Transcript

Contract Report

DRDC Atlantic CR 2009-112

August 2009

Defence Research and Recherche et développement Development Canada pour la défense Canada Defence Research and Recherche et développement Development Canada pour la défense Canada

AVAST 2009 User’s Guide for the AVAST Autotester

Dave Brennan Martec Limited

Ron Watanabe Martec Limited

Martec Limited 1888 Brunswick Street, Suite 400 Halifax Nova Scotia B3J 3J8

Project Manager: D. Brennan (902) 425-5101 x226

Contract number: W7707-088100

Contract Scientific Authority: L. Gilroy, Telephone # (902) 426-3100 x365 Leader, Underwater Signatures Group

AVAST 2009 User’s Guide for the AVAST Autotester

Dave Brennan Martec Limited

Ron Watanabe Martec Limited

Martec Limited 1888 Brunswick Street, Suite 400 Halifax Nova Scotia B3J 3J8

Project Manager: D. Brennan (902) 425-5101 x226

Contract number: W7707-088100

Contract Scientific Authority: L. Gilroy, Telephone # (902) 426-3100 x365 Leader, Underwater Signatures Group

Defence R&D Canada – Atlantic

Contract Report DRDC Atlantic CR 2009 - 112 August 2009

The scientific or technical validity of this Contract Report is entirely the responsibility of the contractor and the contents do not necessarily have the approval or endorsement of Defence R&D Canada.

The scientific or technical validity of this Contract Report is entirely the responsibility of the contractor and the contents do not necessarily have the approval or endorsement of Defence R&D Canada.

© Her Majesty the Queen as represented by the Minister of National Defence, 2009

© Sa majesté la reine, représentée par le ministre de la Défense nationale, 2009

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Abstract

The AVAST software was developed to predict underwater radiated noise and acoustic target strength of ships and submarines. Over the last several years the AVAST code has undergone significant modifications and upgrades. At this point in the software development cycle, it is necessary for the software to undergo a rigorous series of regression tests to ensure the entire suite of analysis features is still operating properly

A series of benchmark test cases has been developed to validate the AVAST software after any significant modifications are made to the code. To aid in the evaluation of the testing, an autotester was developed to automate the process of running the test models, comparing the new results to the benchmark results, and generating reports.

Additional benchmark test cases will be added as the analysis features of the software are upgraded. It is suggested that the AVAST software should be modified to generate standardized output files in Tecplot format. This approach would eliminate the need for codes to translate the data into the format necessary to plot the results for comparison with the benchmark results.

Résumé

Le logiciel AVAST a été conçu pour prédire le niveau de bruit transmis par rayonnement sous-marin et déterminer l’indice de réflexion acoustique des navires et des sous-marins. Au cours des dernières années, le code du logiciel AVAST a subi des modifications et des mises à niveau importantes. Au moment présent du cycle de développement du logiciel, AVAST doit subir une série d’essais de régression rigoureux pour s’assurer que toutes les caractéristiques d’analyse fonctionnent correctement.

Une série de tests de performance a été mise au point afin de valider le logiciel AVAST une fois que toutes les modifications importantes au code auront été apportées. Pour contribuer à l’évaluation de ces tests, on a conçu un testeur automatique capable d’automatiser le processus d’évaluation des tests modèles, la comparaison de nouveaux résultats et de résultats des tests de performance et la création de rapports.

Des tests de performance supplémentaires seront ajoutés à mesure que les caractéristiques d’analyse du logiciel seront mises à niveau. On a proposé de modifier le logiciel AVAST de manière à créer des fichiers de sortie normalisés en format Tecplot. Cette modification éliminerait la nécessité d’utiliser des codes pour convertir les données vers un format cible aux fins de représentation graphique des résultats et de comparaison avec les résultats des tests de performance.

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Executive summary

Introduction

The AVAST software was developed to predict underwater radiated noise and acoustic target strength of ships and submarines. Over the last several years the AVAST code has undergone significant modifications and upgrades. At this point in the software development cycle, it is necessary for the software to undergo a rigorous series of regression tests to ensure the entire suite of analysis features is still operating properly

Results

To aid in the evaluation of the testing, an autotester was developed to automate the process of running the test models, comparing the new results to the benchmark results, and generating reports.

Significance

A series of benchmark test cases has been developed to validate the AVAST software after any significant modifications are made to the code.

Future Plans

Additional benchmark test cases will be added as the analysis features of the software are upgraded. It is suggested that the AVAST software should be modified to generate standardized output files in Tecplot format. This approach would eliminate the need for codes to translate the data into the format necessary to plot the results for comparison with the benchmark results.

Brennan, D. and Watanabe, R. 2009. AVAST 2009 - User’s Guide for the AVAST Autotester. DRDC CR 2009-112. DRDC Atlantic.

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Sommaire

Introduction

Le logiciel AVAST a été conçu pour prédire le niveau de bruit transmis par rayonnement sous-marin et déterminer l’indice de réflexion acoustique des navires et des sous-marins. Au cours des dernières années, le code du logiciel AVAST a subi des modifications et des mises à niveau importantes. Au moment présent du cycle de développement du logiciel, AVAST doit subir une série d’essais de régression rigoureux pour s’assurer que toutes les caractéristiques d’analyse fonctionnent correctement.

Résultats

Pour contribuer à l’évaluation de ces tests, on a conçu un testeur automatique capable d’automatiser le processus d’évaluation des tests modèles, la comparaison de nouveaux résultats et de résultats des tests de performance et la création de rapports.

Portée

Une série de tests de performance a été mise au point afin de valider le logiciel AVAST une fois que toutes les modifications au code auront été apportées.

Recherches futures

Des tests de performance supplémentaires seront ajoutés à mesure que les caractéristiques d’analyse du logiciel seront mises à niveau. On a proposé de modifier le logiciel AVAST de manière à créer des fichiers de sortie normalisés en format Tecplot. Cette modification éliminerait la nécessité d’utiliser des codes pour convertir les données vers un format cible aux fins de représentation graphique des résultats et de comparaison avec les résultats des tests de performance.

Brennan, D. and Watanabe, R. 2009. AVAST 2009 - User’s Guide for the AVAST Autotester. DRDC CR 2009-112. DRDC Atlantic.

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Table of contents

Abstract........................................................................................................................................ i

Executive summary ................................................................................................................... iii

Sommaire ................................................................................................................................... iv

Table of contents ........................................................................................................................ v

List of figures ........................................................................................................................... vii

1. Introduction ................................................................................................................... 1

2. AVAST Autotester Files ............................................................................................... 2

2.1 Validation Data Files ........................................................................................ 2 2.2 Autotester Files ................................................................................................. 4

3. Procedure for Running the AVAST Autotester ............................................................. 5

3.1 Test Procedure .................................................................................................. 5

4. Recommendations ......................................................................................................... 7

Annexes ...................................................................................................................................... 9

1. Test Case #1: BARGL ................................................................................................. 10

2. Test Case #2: Full Cylinder BM 7500 Hz Mono ......................................................... 13

3. Test Case #3: Full Cylinder Kirchhoff 7500 Hz Mono ............................................... 15

4. Test Case #4: Full Sphere Interior ............................................................................... 17

5. Test Case #5: Full Sphere Mixed Radiation Pressure BC ........................................... 19

6. Test Case #6: Half Sphere Rigid Xeq2 BiStatic .......................................................... 21

7. Test Case #7: Half Sphere Rigid Xeq2 Radiation ....................................................... 23

8. Test Case #8: Half Sphere Rigid Yeq2 BiStatic .......................................................... 25

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List of tables .............................................................................................................................. vii

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9. Test Case #9: Half Sphere Rigid Yeq2 Radiation ....................................................... 27

10. Test Case #10: Half Sphere Rigid Zeq2 BiStatic ........................................................ 29

11. Test Case #11: Half Sphere Rigid Zeq2 Radiation ...................................................... 31

12. Test Case #12: Kirchhoff Full Capsule 200Hz ............................................................ 33

13. Test Case #13: Kirchhoff Half Capsule Y Symm 200Hz ............................................ 35

14. Test Case #14: Quarter Sphere Radiation .................................................................... 37

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List of figures

Figure 1. Wet Natural Frequencies ............................................................................................... 10

Figure 2. XY Plot of Radiated, Scattered and Total Pressures......................................................... 11

Figure 3. Polar Plot of Radiated, Scattered and Total Pressures ..................................................... 12

Figure 4. XY Plot of Radiated, Scattered and Total Pressures......................................................... 13

Figure 5. Polar Plot of Radiated, Scattered and Total Pressures ..................................................... 14

Figure 6. XY Plot of Radiated, Scattered and Total Pressures......................................................... 15

Figure 7. Polar Plot of Radiated, Scattered and Total Pressures ..................................................... 16

Figure 8. XY Plot of Radiated, Scattered and Total Pressures......................................................... 17

Figure 9. Polar Plot of Radiated, Scattered and Total Pressures ..................................................... 18

Figure 10. XY Plot of Radiated, Scattered and Total Pressures....................................................... 19

Figure 11. Polar Plot of Radiated, Scattered and Total Pressures ................................................... 20

Figure 12. XY Plot of Radiated, Scattered and Total Pressures....................................................... 21

Figure 13. Polar Plot of Radiated, Scattered and Total Pressures ................................................... 22

Figure 14. XY Plot of Radiated, Scattered and Total Pressures....................................................... 23

Figure 15. Polar Plot of Radiated, Scattered and Total Pressures ................................................... 24

Figure 16. XY Plot of Radiated, Scattered and Total Pressures....................................................... 25

Figure 17. Polar Plot of Radiated, Scattered and Total Pressures ................................................... 26

Figure 18. XY Plot of Radiated, Scattered and Total Pressures....................................................... 27

Figure 19. Polar Plot of Radiated, Scattered and Total Pressures ................................................... 28

Figure 20. XY Plot of Radiated, Scattered and Total Pressures....................................................... 29

Figure 21. Polar Plot of Radiated, Scattered and Total Pressures ................................................... 30

Figure 22. XY Plot of Radiated, Scattered and Total Pressures....................................................... 31

Figure 23. Polar Plot of Radiated, Scattered and Total Pressures ................................................... 32

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Figure 24. XY Plot of Radiated, Scattered and Total Pressures....................................................... 33

Figure 25. Polar Plot of Radiated, Scattered and Total Pressures ................................................... 34

Figure 26. XY Plot of Radiated, Scattered and Total Pressures....................................................... 35

Figure 27. Polar Plot of Radiated, Scattered and Total Pressures ................................................... 36

Figure 28. XY Plot of Radiated, Scattered and Total Pressures....................................................... 37

Figure 29. Polar Plot of Radiated, Scattered and Total Pressures ................................................... 38

List of tables

Table 1. Benchmark Test Cases ................................................................................................. 2

Table 2. Functions of Autotester Files ........................................................................................ 4

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1. Introduction

The AVAST software was developed to predict underwater radiated noise and acoustic target strength of ships and submarines. Over the last several years the AVAST code has undergone significant modifications and upgrades. At this point in the software development cycle, it is necessary for the software to undergo a rigorous series of regression tests to ensure the entire suite of analysis features is still operating properly.

A series of benchmark test cases has been developed to validate the AVAST software after any significant modifications are made to the code. To aid in the evaluation of the testing, an autotester was developed to automate the process of running the test models, comparing the new results to the benchmark results, and generating reports.

The autotester files are discussed in Section 2 and the procedure for running the autotester is outlined in Section 3.

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2. AVAST Autotester Files

All AVAST autotester files should be stored in a folder called \AVAST\, which is located in the system root folder.

The solver to be tested (AvastSolver_Console.exe) should be copied to the folder \AVAST\01-Solver\.

The benchmark files for the 14 test cases and the input files for the AVAST solver should be installed in the folder \AVAST\02-ValidationData\. Additional information about the test cases and data files is presented in Section 2.1.

The autotester files should be installed in the folder \AVAST\03-Autotester\. These files include the batch, macro and executable files that are used to set up a test folder, run the solver using standard input data, compare the test results against the benchmark results, and generate a test report. Additional information about the autotester files is presented in Section 2.2.

2.1 Validation Data Files

The autotester runs AVAST for the 14 benchmark test cases shown in Table 1.

Table 1. Benchmark Test Cases

TEST LOCATION OF FILES* DESCRIPTION OF TEST

Test #1

\BARGL\ Elastic Radiation analysis of an FE model and an AVAST model with 20 wet natural frequencies, to compute radiation pressures for 36 θ-angles at 105 Hz.

Test #2

\FullCylinderBM7500hzMono\ Monostatic Target Strength analysis of a full geometric model of a rigid cylinder, using a Burton and Millar formulation to compute radiation pressures for 360 θ-angles and 360 φ-angles at 7500 Hz.

Test #3

\Full Cylinder Kirchhoff 7500 Hz Mono\ Monostatic Target Strength analysis of a full geometric model of a rigid cylinder, using a Kirchhoff formulation to compute radiation pressures for 36 θ-angles at 7500 Hz.

Test #4

\FullSphereInterior\ Transducer analysis of the interior of a full geometric model of a sphere to compute radiation pressures for 36 θ-angles

Test #5

\FullSphereMixedRadiationPressureBC\ Radiation analysis of a full geometric model of a sphere, using mixed radiation pressure boundary conditions to compute radiation pressures for 36 θ-angles

Test #6

\HalfSphereRigidXeq2BiStatic\ Bistatic target strength analysis of a half geometric model of a rigid sphere, using the symmetry option for equations in the X-direction to compute radiation pressures for 36 θ-angles at 0.159 Hz.

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Test #7

\HalfSphereRigidXeq2Radiation\ Radiation target strength analysis of a half geometric model of a rigid sphere, using the symmetry option for equations in the X-direction to compute radiation pressures for 36 θ-angles.

Test #8

\HalfSphereRigidYeq2BiStatic\ Bistatic target strength analysis of a half geometric model of a rigid sphere, using the symmetry option for equations in the Y-direction to compute radiation pressures for 36 θ-angles at 0.159 Hz..

Test #9

\HalfSphereRigidYeq2Radiation\ Radiation target strength analysis of a half geometric model of a rigid sphere, using the symmetry option for equations in the Y-direction to compute radiation pressures for 36 θ-angles.

Test #10

\HalfSphereRigidZeq2BiStatic\ Bistatic target strength analysis of a half geometric model of a rigid sphere, using the symmetry option for equations in the Z-direction to compute radiation pressures for 36 θ-angles at 0.159 Hz.

Test #11

\HalfSphereRigidZeq2Radiation\ Radiation target strength analysis of a half geometric model of a rigid sphere, using the symmetry option for equations in the Z-direction to compute radiation pressures for 36 θ-angles.

Test #12

\KirchhoffFullCapsule200Hz\ Kirchhoff target strength analysis of a full geometric model of a capsule to compute radiation pressures for 360 θ-angles at 200 Hz

Test #13

\KirchhoffHalfCapsuleYSymm200Hz\ Kirchhoff target strength analysis of a half geometric model of a capsule, using the Y symmetry option to compute radiation pressures for 36 θ-angles at 200 Hz.

Test #14

\QuarterSphereRadiation\ Radiation target strength analysis of a quarter geometric model of a rigid sphere, using the symmetry option to compute radiation pressures for 36 θ-angles.

* Folders should be installed in \AVAST\02-ValidationData\

The standard input files for these tests are stored in the folder \AVAST\, and each folder contains the following 9 files (where filename is an abbreviation of the folder name): AVAST.IOF AVAST input/output control file (input for tests) AVAST.BEM AVAST boundary element model data file (input for tests) filenamepressuresXY.lay Tecplot layout file for generating XY-plots of pressures filenamepressures.lay Tecplot layout file for generating polar-plots of pressures AVAST-STD.IOF AVAST input/output control file (benchmark file) AVAST-STD.BEM AVAST boundary element model data file (benchmark file) AVAST-STD.OUT AVAST output file (benchmark file) AVAST-STD.LOG AVAST log file (benchmark file) press-STD.dat AVAST output translated to Tecplot format (benchmark file)

The \BARGL\ folder also include two extra files for the wet natural frequencies: filenamewnf.lay Tecplot layout file for generating plots of wet natural frequencies wnf-STD.dat AVAST output translated to Tecplot format (benchmark file)

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2.2 Autotester Files

The different types of autotester files and their functions are shown in Table 2.

Table 2. Functions of Autotester Files

AUTOTESTER FILES* TYPE FUNCTION

Step1-GetInputData Shortcut Provides a hyperlink to the file Step1-GetInputData.exe (useful if the files are stored on a fileserver instead of a local drive).

Step1-GetInputData.exe Fortran executable

Copies AVAST solver, validation data and autotester files to a test directory, writes messages to an Autotest.log file, and creates the batch file Step2-RunAtests.bat.

AVASTAutotester.bat Batch file Runs all test cases, with input from the parallelflag.inp file.

parallelflag.inp ASCII file Turns off the option for parallel processing.

Step2-RunAtests.bat Batch file Runs the AVAST solver on all test cases, and writes messages to an Autotest.log file.

Step3a-RunAVASTWindiff.bat Batch file Compares ASCII files from test cases (AVAST.IOF, AVAST.BEM, AVAST.OUT and AVAST.LOG) with ASCII benchmark files (AVAST-STD.IOF, AVAST-STD.BEM, AVAST-STD.OUT and AVAST-STD.LOG), and writes results to AVASTdiff.out

Step3b-GenerateAvastTecplotFigures.bat Batch file Runs translator programs to convert AVAST.OUT to files in Tecplot format and runs Tecplot macros for polar-rectangular conversion and for exporting plots.

tr*.exe Fortran executable

Translates AVAST.OUT to a Tecplot format file press.dat.

filename.mcr Tecplot macro

Loads the files press.dat and press-STD.dat in Tecplot and creates XY plots, then transforms polar coordinates to Tecplot’s rectangular coordinate system creates polar plots and creates the binary files pressRad.plt and pressRad-STD.plt. For the \BARGL\ folder, loads the files wnf.dat and wnf-STD.dat in Tecplot and creates XY plots

ExportfilenamepressXY.mcr Tecplot macro

Opens the Tecplot lay files for each test case, loads the files press.dat and exports the plots to WMF files.

Exportfilenamepress.mcr Tecplot macro

Opens the Tecplot lay files for each test case, loads the files pressRad.plt and exports the plots to WMF files.

ExportBARGLwnf.mcr Tecplot macro

Opens the Tecplot lay files for the BARGL test case, loads the files wnf.dat and exports the plots to WMF files.

MasterTemplateTestResultsFromAVASTAutotester.doc

Word document containing a macro

Running the macro InsertAutotesterPlots inserts the WMF files as pictures, resizes the figures, and saves the document as TestResultsFromAVASTAutotester.doc.

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3. Procedure for Running the AVAST Autotester

The autotester files, AVAST solver and standard input files for the tests are stored in the folder \AVAST\, which is located in the system root folder. Batch, macro and executable files are used to:

• Download the input files to the folder \testAVASTsolvers\

• Run the AVAST solver on the benchmark test cases

• Compare the ASCII input and output files

• Generate plots for comparing the test results against the benchmark results.

• Insert XY and polar plots into a test report.

The computed pressures in the AVAST output file are converted to Tecplot format, plotted in rectangular and polar coordinates and exported to graphics files. Plots of the test results and benchmark results are then inserted into a Word Document for comparison purposes. A sample autotester report is presented in Appendix A

3.1 Test Procedure

The validation tests should be performed as follows.

1. Installing the AVAST Solver

• Copy the most recent version of the AVAST solver to \AVAST\01-Solver\.

2. Installing Input Data for Benchmark Test Cases

• Copy the input data for the benchmark test cases to \AVAST\02-ValidationData\.

3. Installing the Autotester files

• Copy theautotester files to \AVAST\03-Autotester\.

4. Setting up a Working Directory

• In \AVAST\03-AVASTautotester\, run the file Step1-GetInputData (hyperlink)or Step1-GetInputData.exe, which will do the following:

o Create a working directory \testAVASTsolvers\.o Copy the AVAST solver from \AVAST\01-Solver\ to the working directory.o Copy folders containing the input data, benchmark data and Tecplot data files

from \AVAST\02-ValidationData\ to the working directory.

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o Copy the autotester files from \AVAST\03-Autotester\ to the workingdirectory.

5. Testing the AVAST Solver

• In \testAVASTsolvers\, run the file Step2-RunAtests, which will run the codes oneach of the benchmark test cases.

6. Postprocessing of the Test Results

• In \testAVASTsolvers\, run the file Step3-GenerateAVASTecplotFigures, whichwill do the following:

o Apply translator programs that read AVAST output files and create input datafiles for Tecplot.

o Apply a Tecplot macro to create rectangular and polar plots and export themto WMF files.

7. Generating a Report of the Test Results

• In \testAVASTsolvers\, enable macros in Word, and open the Word documentMasterTemplateTestResultsFromAVASTAutotester.doc and run the macroInsertTecplotFigures, which will do the following:

o Insert the WMF files generated by the Tecplot macros as pictures, and resizethe figures.

o Save the document as TestResultsFromAVASTAutotester.doc.

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4. Recommendations

Additional benchmark test cases will be added as the analysis features of the software are upgraded.

It is suggested that the AVAST software should be modified to generate standardized output files in Tecplot format. This approach would eliminate the need for codes to translate the data into the format necessary to plot the results for comparison with the benchmark results.

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Annexes

ANNEX A: TEST RESULTS FROM THE AVAST AUTOTESTER

Standard Comparison Tests

Test Case Test Description

Figure No. Plots of Baseline and Test Results

#1. BARGL Fig. 1 Fig. 2 Fig. 3

Wet natural frequencies XY plot of radiated, scattered and total pressure Polar plot of radiated, scattered and total pressure

#2. Full Cylinder BM 7500 Hz Mono Fig. 4 Fig. 5

XY plot of radiated, scattered and total pressure Polar plot of radiated, scattered and total pressure

#3. Full Cylinder Kirchhoff 7500 Hz Mono Fig. 6 Fig. 7

XY plot of radiated, scattered and total pressure Polar plot of radiated, scattered and total pressure

#4. Full Sphere Interior Fig. 8 Fig. 9

XY plot of radiated, scattered and total pressure Polar plot of radiated, scattered and total pressure

#5. Full Sphere Mixed Radiation Pressure BC Fig. 10 Fig. 11

XY plot of radiated, scattered and total pressure Polar plot of radiated, scattered and total pressure

#6. Half Sphere Rigid Xeq2 BiStatic Fig. 12 Fig. 13

XY plot of radiated, scattered and total pressure Polar plot of radiated, scattered and total pressure

#7. Half Sphere Rigid Xeq2 Radiation Fig. 14 Fig. 15

XY plot of radiated, scattered and total pressure Polar plot of radiated, scattered and total pressure

#8. Half Sphere Rigid Yeq2 BiStatic Fig. 16 Fig. 17

XY plot of radiated, scattered and total pressure Polar plot of radiated, scattered and total pressure

#9. Half Sphere Rigid Yeq2 Radiation Fig. 18 Fig. 19

XY plot of radiated, scattered and total pressure Polar plot of radiated, scattered and total pressure

#10. Half Sphere Rigid Zeq2 BiStatic Fig. 20 Fig. 21

XY plot of radiated, scattered and total pressure Polar plot of radiated, scattered and total pressure

#11. Half Sphere Rigid Zeq2 Radiation Fig. 22 Fig. 23

XY plot of radiated, scattered and total pressure Polar plot of radiated, scattered and total pressure

#12. Kirchhoff Full Capsule 200 Hz Fig. 24 Fig. 25

XY plot of radiated, scattered and total pressure Polar plot of radiated, scattered and total pressure

#13. Kirchhoff Half Capsule Y Symm 200 Hz Fig. 26 Fig. 27

XY plot of radiated, scattered and total pressure Polar plot of radiated, scattered and total pressure

#14 Quarter Sphere Radiation Fig. 28 Fig. 29

XY plot of radiated, scattered and total pressure Polar plot of radiated, scattered and total pressure

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1. Test Case #1: BARGL

Re(f)

Im(f)

0 100 200 300 400-2

-1.8

-1.6

-1.4

-1.2

-1

-0.8

-0.6

-0.4

-0.2

0

0.2

Wet natural frequencies - benchmark 25 Mar 2009 Wet Natural Frequencies

Re(f)

Im(f)

0 100 200 300 400-2

-1.8

-1.6

-1.4

-1.2

-1

-0.8

-0.6

-0.4

-0.2

0

0.2

Wet natural frequencies - test results 25 Mar 2009 Wet Natural Frequencies

Test Case: BARGL 25 Mar 2009 No Data Set

Figure 1. Wet Natural Frequencies

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Angle (radians)

Tota

lpre

ssur

e(d

B)

0 1 2 3 4 5 60

0.1

0.2

0.3

0.4

0.5

0.6

0.7

0.8

0.9

1

1.1

1.2

Total pressure (dB) - benchmark results 25 Mar 2009 Radiated Pressures

Angle (radians)

Rad

iate

dpr

essu

re(d

B)

0 1 2 3 4 5 60

0.05

0.1

0.15

0.2

0.25

0.3

0.35

0.4

0.45

0.5

0.55

0.6

Radiated pressure (dB) - test results 25 Mar 20

Angle (radians)

Tota

lpre

ssur

e(d

B)

0 1 2 3 4 5 60

0.1

0.2

0.3

0.4

0.5

0.6

0.7

0.8

0.9

1

1.1

1.2

Total pressure (dB) - test results 25 Mar 20

Angle (radians)

Sca

ttere

dpr

essu

re(d

B)

0 1 2 3 4 5 60

0.05

0.1

0.15

0.2

0.25

0.3

0.35

0.4

0.45

0.5

0.55

0.6

Scattered pressure (dB) - Test results 25 Mar

Angle (radians)

Sca

ttere

dpr

essu

re(d

B)

0 1 2 3 4 5 60

0.05

0.1

0.15

0.2

0.25

0.3

0.35

0.4

0.45

0.5

0.55

0.6

Scattered pressure (dB) - benchmark results 25 Mar 2009 Radiated Pressures

Angle (radians)

Rad

iate

dpr

essu

re(d

B)

0 1 2 3 4 5 60

0.05

0.1

0.15

0.2

0.25

0.3

0.35

0.4

0.45

0.5

0.55

0.6

Radiated pressure (dB) - benchmark results 25 Mar 2009 Radiated Pressures

Test Case: BARGL 25 Mar 2009 No Data Set

Figure 2. XY Plot of Radiated, Scattered and Total Pressures

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Radiated pressure (dB)-0.6 -0.5 -0.4 -0.3 -0.2 -0.1 0 0.1 0.2 0.3 0.4 0.5 0.6

-0.6

-0.5

-0.4

-0.3

-0.2

-0.1

0

0.1

0.2

0.3

0.4

0.5

0.6

Radiated Pressure - benchmark results 25 Mar 2009 Radiated Pressures

Scattered pressure (dB)-0.6 -0.5 -0.4 -0.3 -0.2 -0.1 0 0.1 0.2 0.3 0.4 0.5 0.6

-0.6

-0.5

-0.4

-0.3

-0.2

-0.1

0

0.1

0.2

0.3

0.4

0.5

0.6

Scattered Pressure - benchmark results 25 Mar 2009 Radiated Pressures

Total pressure (dB)-1.2 -1 -0.8 -0.6 -0.4 -0.2 0 0.2 0.4 0.6 0.8 1 1.2

-1.2

-1

-0.8

-0.6

-0.4

-0.2

0

0.2

0.4

0.6

0.8

1

1.2

Total Pressure - benchmark results 25 Mar 2009 Radiated Pressures

Radiated pressure (dB)-0.6 -0.5 -0.4 -0.3 -0.2 -0.1 0 0.1 0.2 0.3 0.4 0.5 0.6

-0.6

-0.5

-0.4

-0.3

-0.2

-0.1

0

0.1

0.2

0.3

0.4

0.5

0.6

Radiated Pressure - Test Results 25 Mar 2

Scattered pressure (dB)-0.6 -0.5 -0.4 -0.3 -0.2 -0.1 0 0.1 0.2 0.3 0.4 0.5 0.6

-0.6

-0.5

-0.4

-0.3

-0.2

-0.1

0

0.1

0.2

0.3

0.4

0.5

0.6

Scattered Pressure - test results 25 Mar 20

Total pressure (dB)-1.2 -1 -0.8 -0.6 -0.4 -0.2 0 0.2 0.4 0.6 0.8 1 1.2

-1.2

-1

-0.8

-0.6

-0.4

-0.2

0

0.2

0.4

0.6

0.8

1

1.2

Total Pressure - test results 25 Ma

Test Case: BARGL 25 Mar 2009 No Data Set

Figure 3. Polar Plot of Radiated, Scattered and Total Pressures

DRDC Atlantic CR 2009-112

13

2. Test Case #2: Full Cylinder BM 7500 Hz Mono

Angle (radians)

Rad

iate

dpr

essu

re(d

B)

0 1 2 3 4 5 60

0.0001

0.0002

0.0003

0.0004

0.0005

0.0006

0.0007

0.0008

0.0009

0.001

Radiated pressure (dB) - test results 25 Mar 20

Angle (radians)

Rad

iate

dpr

essu

re(d

B)

0 1 2 3 4 5 60

0.0001

0.0002

0.0003

0.0004

0.0005

0.0006

0.0007

0.0008

0.0009

0.001

Radiated pressure (dB) - benchmark results 25 Mar 2009 Incident Pressures

Angle (radians)

Sca

ttere

dpr

essu

re(d

B)

0 1 2 3 4 5 6-50

-40

-30

-20

-10

0

Scattered pressure (dB) - benchmark results 25 Mar 2009 Incident Pressures

Angle (radians)

Sca

ttere

dpr

essu

re(d

B)

0 1 2 3 4 5 6-50

-40

-30

-20

-10

0

Scattered pressure (dB) - Test results 25 Mar

Angle (radians)

Tota

lpre

ssur

e(d

B)

0 1 2 3 4 5 60

0.0002

0.0004

0.0006

0.0008

0.001

0.0012

0.0014

0.0016

0.0018

0.002

Total pressure (dB) - benchmark results 25 Mar 2009 Incident Pressures

Angle (radians)

Tota

lpre

ssur

e(d

B)

0 1 2 3 4 5 60

0.0002

0.0004

0.0006

0.0008

0.001

0.0012

0.0014

0.0016

0.0018

0.002

Total pressure (dB) - test results 25 Mar 20

P-Inc

Ang

le

-40 -20 0 200

1

2

3

4

5

6

Test Case: fullCylinderBM7500hzMono 25 Mar 2009 Incident Pressures

Figure 4. XY Plot of Radiated, Scattered and Total Pressures

DRDC Atlantic CR 2009-112

14

Radiated pressure (dB)-0.001 -0.0005 0 0.0005 0.001

-0.001

-0.00075

-0.0005

-0.00025

0

0.00025

0.0005

0.00075

0.001

Radiated Pressure - benchmark results 25 Mar 2009 Incident Pressures

Radiated pressure (dB)-0.001 -0.0005 0 0.0005 0.001

-0.001

-0.00075

-0.0005

-0.00025

0

0.00025

0.0005

0.00075

0.001

Radiated Pressure - Test Results 25 Mar 2

Scattered pressure (dB)-50 -40 -30 -20 -10 0 10 20 30 40 50

-50

-40

-30

-20

-10

0

10

20

30

40

50

Scattered Pressure - benchmark results 25 Mar 2009 Incident Pressures

Scattered pressure (dB)-50 -40 -30 -20 -10 0 10 20 30 40 50

-50

-40

-30

-20

-10

0

10

20

30

40

50

Scattered Pressure - test results 25 Mar 20

Total pressure (dB)-0.002 -0.001 0 0.001 0.002

-0.002

-0.0015

-0.001

-0.0005

0

0.0005

0.001

0.0015

0.002

Total Pressure - benchmark results 25 Mar 2009 Incident Pressures

Total pressure (dB)-0.002 -0.001 0 0.001 0.002

-0.002

-0.0015

-0.001

-0.0005

0

0.0005

0.001

0.0015

0.002

Total Pressure - test results 25 Ma

Test Case: fullCylinderBM7500hzMono 25 Mar 2009 No Data Set

Figure 5. Polar Plot of Radiated, Scattered and Total Pressures

DRDC Atlantic CR 2009-112

15

3. Test Case #3: Full Cylinder Kirchhoff 7500 Hz MonoP-Inc

Ang

le

-40 -20 0 200

1

2

3

4

5

6

Test Case: fullCylinderKirchhoff7500HzMono 25 Mar 2009 Incident Pr

Angle (radians)

Inci

dent

pres

sure

(dB

)

0 1 2 3 4 5 60

0.0001

0.0002

0.0003

0.0004

0.0005

0.0006

0.0007

0.0008

0.0009

0.001

Incident pressure (dB) - test results 25 Mar 200

Angle (radians)

Inci

dent

pres

sure

(dB

)

0 1 2 3 4 5 60

0.0001

0.0002

0.0003

0.0004

0.0005

0.0006

0.0007

0.0008

0.0009

0.001

Incident pressure (dB) - benchmark results 25 Mar 2009 Incident Pressures

Angle (radians)

Sca

ttere

dpr

essu

re(d

B)

0 1 2 3 4 5 60

5E-07

1E-06

1.5E-06

2E-06

2.5E-06

3E-06

Scattered pressure (dB) - benchmark results 25 Mar 2009 Incident Pressures

Angle (radians)

Sca

ttere

dpr

essu

re(d

B)

0 1 2 3 4 5 60

5E-07

1E-06

1.5E-06

2E-06

2.5E-06

3E-06

Scattered pressure (dB) - Test results 25 Mar

Angle (radians)

Tota

lpre

ssur

e(d

B)

0 1 2 3 4 5 6-50

-40

-30

-20

-10

0

10

20

Total pressure (dB) - benchmark results 25 Mar 2009 Incident Pressures

Angle (radians)

Tota

lpre

ssur

e(d

B)

0 1 2 3 4 5 6-50

-40

-30

-20

-10

0

10

20

Total pressure (dB) - test results 25 Mar 20

Figure 6. XY Plot of Radiated, Scattered and Total Pressures

DRDC Atlantic CR 2009-112

16

Test Case: fullCylinderKirchhoff7500HzMono 25 Mar 2009 No Data Se

Incident pressure (dB)-0.001 -0.0005 0 0.0005 0.001

-0.001

-0.00075

-0.0005

-0.00025

0

0.00025

0.0005

0.00075

0.001

Incident pressure - benchmark results 25 Mar 2009 Incident Pressures

Incident pressure (dB)-0.001 -0.0005 0 0.0005 0.001

-0.001

-0.00075

-0.0005

-0.00025

0

0.00025

0.0005

0.00075

0.001

Incident pressure - Test Results 25 Mar 20

Scattered pressure (dB)-1E-06 -5E-07 0 5E-07 1E-06

-1E-05

-7.5E-06

-5E-06

-2.5E-06

0

2.5E-06

5E-06

7.5E-06

1E-05

Scattered Pressure - benchmark results 25 Mar 2009 Incident Pressures

Scattered pressure (dB)-1E-06 -5E-07 0 5E-07 1E-06

-1E-05

-7.5E-06

-5E-06

-2.5E-06

0

2.5E-06

5E-06

7.5E-06

1E-05

Scattered Pressure - test results 25 Mar 20

Total pressure (dB)-40 -30 -20 -10 0 10 20 30 40

-40

-30

-20

-10

0

10

20

30

40

Total Pressure - benchmark results 25 Mar 2009 Incident Pressures

Total pressure (dB)-40 -30 -20 -10 0 10 20 30 40

-40

-30

-20

-10

0

10

20

30

40

Total Pressure - test results 25 Ma

Figure 7. Polar Plot of Radiated, Scattered and Total Pressures

DRDC Atlantic CR 2009-112

17

4. Test Case #4: Full Sphere InteriorP-Inc

Ang

le

-40 -20 0 200

1

2

3

4

5

6

Test Case: fullSphereInterior 25 Mar 2009 Incident

Angle (radians)

Inci

dent

pres

sure

(dB

)

0 1 2 3 4 5 60

0.0001

0.0002

0.0003

0.0004

0.0005

0.0006

0.0007

0.0008

0.0009

0.001

Incident pressure (dB) - test results 25 Mar 200

Angle (radians)

Inci

dent

pres

sure

(dB

)

0 1 2 3 4 5 60

0.0001

0.0002

0.0003

0.0004

0.0005

0.0006

0.0007

0.0008

0.0009

0.001

Incident pressure (dB) - benchmark results 25 Mar 2009 Incident Pressures

Angle (radians)

Tota

lpre

ssur

e(d

B)

0 1 2 3 4 5 60

0.0002

0.0004

0.0006

0.0008

0.001

0.0012

0.0014

0.0016

0.0018

0.002

Total pressure (dB) - benchmark results 25 Mar 2009 Incident Pressures

Angle (radians)

Tota

lpre

ssur

e(d

B)

0 1 2 3 4 5 60

0.0002

0.0004

0.0006

0.0008

0.001

0.0012

0.0014

0.0016

0.0018

0.002

Total pressure (dB) - test results 25 Mar 20

Angle (radians)

Sca

ttere

dpr

essu

re(d

B)

0 1 2 3 4 5 60

0.0001

0.0002

0.0003

0.0004

0.0005

0.0006

0.0007

0.0008

0.0009

0.001

Scattered pressure (dB) - benchmark results 25 Mar 2009 Incident Pressures

Angle (radians)

Sca

ttere

dpr

essu

re(d

B)

0 1 2 3 4 5 60

0.0001

0.0002

0.0003

0.0004

0.0005

0.0006

0.0007

0.0008

0.0009

0.001

Scattered pressure (dB) - Test results 25 Mar

Figure 8. XY Plot of Radiated, Scattered and Total Pressures

DRDC Atlantic CR 2009-112

18

Test Case: fullSphereInterior 25 Mar 2009 No Data

Incident pressure (dB)-0.001 -0.0005 0 0.0005 0.001

-0.001

-0.00075

-0.0005

-0.00025

0

0.00025

0.0005

0.00075

0.001

Incident pressure - benchmark results 25 Mar 2009 Incident Pressures

Incident pressure (dB)-0.001 -0.0005 0 0.0005 0.001

-0.001

-0.00075

-0.0005

-0.00025

0

0.00025

0.0005

0.00075

0.001

Incident pressure - Test Results 25 Mar 20

Total pressure (dB)-0.002 -0.001 0 0.001 0.002

-0.002

-0.0015

-0.001

-0.0005

0

0.0005

0.001

0.0015

0.002

Total Pressure - benchmark results 25 Mar 2009 Incident Pressures

Total pressure (dB)-0.002 -0.001 0 0.001 0.002

-0.002

-0.0015

-0.001

-0.0005

0

0.0005

0.001

0.0015

0.002

Total Pressure - test results 25 Ma

Scattered pressure (dB)-0.001 -0.0005 0 0.0005 0.001

-0.001

-0.00075

-0.0005

-0.00025

0

0.00025

0.0005

0.00075

0.001

Scattered Pressure - benchmark results 25 Mar 2009 Incident Pressures

Scattered pressure (dB)-0.001 -0.0005 0 0.0005 0.001

-0.001

-0.00075

-0.0005

-0.00025

0

0.00025

0.0005

0.00075

0.001

Scattered Pressure - test results 25 Mar 20

Figure 9. Polar Plot of Radiated, Scattered and Total Pressures

DRDC Atlantic CR 2009-112

19

5. Test Case #5: Full Sphere Mixed Radiation PressureBC

Angle (radians)

Sca

ttere

dpr

essu

re(d

B)

0 1 2 3 4 5 60

0.05

0.1

0.15

0.2

0.25

0.3

Scattered pressure (dB) - benchmark results 25 Mar 2009 Incident Pressures

Angle (radians)

Sca

ttere

dpr

essu

re(d

B)

0 1 2 3 4 5 60

0.05

0.1

0.15

0.2

0.25

0.3

Scattered pressure (dB) - Test results 25 Mar

Angle (radians)

Tota

lpre

ssur

e(d

B)

0 1 2 3 4 5 60

0.05

0.1

0.15

0.2

0.25

0.3

Total pressure (dB) - benchmark results 25 Mar 2009 Incident Pressures

Angle (radians)

Tota

lpre

ssur

e(d

B)

0 1 2 3 4 5 60

0.05

0.1

0.15

0.2

0.25

0.3

Total pressure (dB) - test results 25 Mar 20

Angle (radians)

Inci

dent

pres

sure

(dB

)

0 1 2 3 4 5 60

0.01

0.02

0.03

0.04

0.05

0.06

0.07

0.08

0.09

0.1

Incident pressure (dB) - test results 25 Mar 200

Angle (radians)

Inci

dent

pres

sure

(dB

)

0 1 2 3 4 5 60

0.01

0.02

0.03

0.04

0.05

0.06

0.07

0.08

0.09

0.1

Incident pressure (dB) - benchmark results 25 Mar 2009 Incident PressuresP-Inc

Ang

le

-40 -20 0 200

1

2

3

4

5

6

Test Case: fullSphereMixedRadiationPressureBC 25 Mar 2009 Inciden

Figure 10. XY Plot of Radiated, Scattered and Total Pressures

DRDC Atlantic CR 2009-112

20

Incident pressure (dB)-0.1 -0.05 0 0.05 0.1

-0.1

-0.075

-0.05

-0.025

0

0.025

0.05

0.075

0.1

Incident pressure - benchmark results 25 Mar 2009 Incident Pressures

Scattered pressure (dB)-0.3 -0.2 -0.1 0 0.1 0.2 0.3

-0.3

-0.25

-0.2

-0.15

-0.1

-0.05

0

0.05

0.1

0.15

0.2

0.25

0.3

Scattered Pressure - benchmark results 25 Mar 2009 Incident Pressures

Scattered pressure (dB)-0.3 -0.2 -0.1 0 0.1 0.2 0.3

-0.3

-0.25

-0.2

-0.15

-0.1

-0.05

0

0.05

0.1

0.15

0.2

0.25

0.3

Scattered Pressure - test results 25 Mar 20

Total pressure (dB)-0.3 -0.2 -0.1 0 0.1 0.2 0.3

-0.3

-0.25

-0.2

-0.15

-0.1

-0.05

0

0.05

0.1

0.15

0.2

0.25

0.3

Total Pressure - benchmark results 25 Mar 2009 Incident Pressures

Total pressure (dB)-0.3 -0.2 -0.1 0 0.1 0.2 0.3

-0.3

-0.25

-0.2

-0.15

-0.1

-0.05

0

0.05

0.1

0.15

0.2

0.25

0.3

Total Pressure - test results 25 Ma

Test Case: fullSphereMixedRadiationPressureBC 25 Mar 2009 No Dat

Incident pressure (dB)-0.1 -0.05 0 0.05 0.1

-0.1

-0.075

-0.05

-0.025

0

0.025

0.05

0.075

0.1

Incident pressure - Test Results 25 Mar 20

Figure 11. Polar Plot of Radiated, Scattered and Total Pressures

DRDC Atlantic CR 2009-112

21

6. Test Case #6: Half Sphere Rigid Xeq2 BiStatic

Angle (radians)

Sca

ttere

dpr

essu

re(d

B)

0 1 2 3 4 5 6-50

-40

-30

-20

-10

0

Scattered pressure (dB) - benchmark results 25 Mar 2009 Incident Pressures

Angle (radians)

Sca

ttere

dpr

essu

re(d

B)

0 1 2 3 4 5 6-50

-40

-30

-20

-10

0

Scattered pressure (dB) - Test results 25 Mar

P-Inc

Ang

le

-40 -20 0 200

1

2

3

4

5

6

Test Case: halfSphereRigidXeq2BiStatic 25 Mar 2009 Incident Pressure

Angle (radians)

Inci

dent

pres

sure

(dB

)

0 1 2 3 4 5 60

0.025

0.05

0.075

0.1

0.125

0.15

0.175

0.2

Incident pressure (dB) - benchmark results 25 Mar 2009 Incident Pressures

Angle (radians)

Inci

dent

pres

sure

(dB

)

0 1 2 3 4 5 60

0.025

0.05

0.075

0.1

0.125

0.15

0.175

0.2

Incident pressure (dB) - test results 25 Mar 200

Angle (radians)

Tota

lpre

ssur

e(d

B)

0 1 2 3 4 5 60

0.025

0.05

0.075

0.1

0.125

0.15

0.175

0.2

Total pressure (dB) - benchmark results 25 Mar 2009 Incident Pressures

Angle (radians)

Tota

lpre

ssur

e(d

B)

0 1 2 3 4 5 60

0.025

0.05

0.075

0.1

0.125

0.15

0.175

0.2

Total pressure (dB) - test results 25 Mar 20

Figure 12. XY Plot of Radiated, Scattered and Total Pressures

DRDC Atlantic CR 2009-112

22

Test Case: halfSphereRigidXeq2BiStatic 25 Mar 2009 No Data Set

Incident pressure (dB)-0.2 -0.15 -0.1 -0.05 0 0.05 0.1 0.15 0.2

-0.2

-0.15

-0.1

-0.05

0

0.05

0.1

0.15

0.2

Incident pressure - benchmark results 25 Mar 2009 Incident Pressures

Incident pressure (dB)-0.2 -0.15 -0.1 -0.05 0 0.05 0.1 0.15 0.2

-0.2

-0.15

-0.1

-0.05

0

0.05

0.1

0.15

0.2

Incident pressure - Test Results 25 Mar 20

Scattered pressure (dB)-20 -10 0 10 20

-20

-15

-10

-5

0

5

10

15

20

Scattered Pressure - benchmark results 25 Mar 2009 Incident Pressures

Scattered pressure (dB)-20 -10 0 10 20

-20

-15

-10

-5

0

5

10

15

20

Scattered Pressure - test results 25 Mar 20

Total pressure (dB)-0.2 -0.15 -0.1 -0.05 0 0.05 0.1 0.15 0.2

-0.2

-0.15

-0.1

-0.05

0

0.05

0.1

0.15

0.2

Total Pressure - benchmark results 25 Mar 2009 Incident Pressures

Total pressure (dB)-0.2 -0.15 -0.1 -0.05 0 0.05 0.1 0.15 0.2

-0.2

-0.15

-0.1

-0.05

0

0.05

0.1

0.15

0.2

Total Pressure - test results 25 Ma

Figure 13. Polar Plot of Radiated, Scattered and Total Pressures

DRDC Atlantic CR 2009-112

23

7. Test Case #7: Half Sphere Rigid Xeq2 RadiationP-Inc

Ang

le

-40 -20 0 200

1

2

3

4

5

6

Test Case: halfSphereRigidXeq2Radiation 25 Mar 2009 Incident Pressu

Angle (radians)

Inci

dent

pres

sure

(dB

)

0 1 2 3 4 5 60

0.01

0.02

0.03

0.04

0.05

0.06

0.07

0.08

0.09

0.1

Incident pressure (dB) - benchmark results 25 Mar 2009 Incident Pressures

Angle (radians)

Inci

dent

pres

sure

(dB

)

0 1 2 3 4 5 60

0.01

0.02

0.03

0.04

0.05

0.06

0.07

0.08

0.09

0.1

Incident pressure (dB) - test results 25 Mar 200

Angle (radians)

Sca

ttere

dpr

essu

re(d

B)

0 1 2 3 4 5 60

0.05

0.1

0.15

0.2

0.25

0.3

Scattered pressure (dB) - benchmark results 25 Mar 2009 Incident Pressures

Angle (radians)

Sca

ttere

dpr

essu

re(d

B)

0 1 2 3 4 5 60

0.05

0.1

0.15

0.2

0.25

0.3

Scattered pressure (dB) - Test results 25 Mar

Angle (radians)

Tota

lpre

ssur

e(d

B)

0 1 2 3 4 5 60

0.05

0.1

0.15

0.2

0.25

0.3

Total pressure (dB) - benchmark results 25 Mar 2009 Incident Pressures

Angle (radians)

Tota

lpre

ssur

e(d

B)

0 1 2 3 4 5 60

0.05

0.1

0.15

0.2

0.25

0.3

Total pressure (dB) - test results 25 Mar 20

Figure 14. XY Plot of Radiated, Scattered and Total Pressures

DRDC Atlantic CR 2009-112

24

Test Case: halfSphereRigidXeq2Radiation 25 Mar 2009 No Data Set

Incident pressure (dB)-0.1 -0.05 0 0.05 0.1

-0.1

-0.08

-0.06

-0.04

-0.02

0

0.02

0.04

0.06

0.08

0.1

Incident pressure - benchmark results 25 Mar 2009 Incident Pressures

Incident pressure (dB)-0.1 -0.05 0 0.05 0.1

-0.1

-0.08

-0.06

-0.04

-0.02

0

0.02

0.04

0.06

0.08

0.1

Incident pressure - Test Results 25 Mar 20

Scattered pressure (dB)-0.3 -0.2 -0.1 0 0.1 0.2 0.3

-0.3

-0.25

-0.2

-0.15

-0.1

-0.05

0

0.05

0.1

0.15

0.2

0.25

0.3

Scattered Pressure - benchmark results 25 Mar 2009 Incident Pressures

Scattered pressure (dB)-0.3 -0.2 -0.1 0 0.1 0.2 0.3

-0.3

-0.25

-0.2

-0.15

-0.1

-0.05

0

0.05

0.1

0.15

0.2

0.25

0.3

Scattered Pressure - test results 25 Mar 20

Total pressure (dB)-0.3 -0.2 -0.1 0 0.1 0.2 0.3

-0.3

-0.25

-0.2

-0.15

-0.1

-0.05

0

0.05

0.1

0.15

0.2

0.25

0.3

Total Pressure - benchmark results 25 Mar 2009 Incident Pressures

Total pressure (dB)-0.3 -0.2 -0.1 0 0.1 0.2 0.3

-0.3

-0.25

-0.2

-0.15

-0.1

-0.05

0

0.05

0.1

0.15

0.2

0.25

0.3

Total Pressure - test results 25 Ma

Figure 15. Polar Plot of Radiated, Scattered and Total Pressures

DRDC Atlantic CR 2009-112

25

8. Test Case #8: Half Sphere Rigid Yeq2 BiStatic

Angle (radians)

Sca

ttere

dpr

essu

re(d

B)

0 1 2 3 4 5 6-50

-40

-30

-20

-10

0

Scattered pressure (dB) - benchmark results 25 Mar 2009 Incident Pressures

Angle (radians)

Sca

ttere

dpr

essu

re(d

B)

0 1 2 3 4 5 6-50

-40

-30

-20

-10

0

Scattered pressure (dB) - Test results 25 Mar

P-Inc

Ang

le

-40 -20 0 200

1

2

3

4

5

6

7

8

Test Case: halfSphereRigidYeq2BiStatic 25 Mar 2009 Incident Pressure

Angle (radians)

Inci

dent

pres

sure

(dB

)

0 1 2 3 4 5 60

0.025

0.05

0.075

0.1

0.125

0.15

0.175

0.2

Incident pressure (dB) - benchmark results 25 Mar 2009 Incident Pressures

Angle (radians)

Inci

dent

pres

sure

(dB

)

0 1 2 3 4 5 60

0.025

0.05

0.075

0.1

0.125

0.15

0.175

0.2

Incident pressure (dB) - test results 25 Mar 200

Angle (radians)

Tota

lpre

ssur

e(d

B)

0 1 2 3 4 5 60

0.025

0.05

0.075

0.1

0.125

0.15

0.175

0.2

Total pressure (dB) - benchmark results 25 Mar 2009 Incident Pressures

Angle (radians)

Tota

lpre

ssur

e(d

B)

0 1 2 3 4 5 60

0.025

0.05

0.075

0.1

0.125

0.15

0.175

0.2

Total pressure (dB) - test results 25 Mar 20

Figure 16. XY Plot of Radiated, Scattered and Total Pressures

DRDC Atlantic CR 2009-112

26

Test Case: halfSphereRigidYeq2BiStatic 25 Mar 2009 No Data Set

Incident pressure (dB)-0.2 -0.1 0 0.1 0.2

-0.2-0.175

-0.15-0.125

-0.1-0.075

-0.05-0.025

0

0.0250.05

0.0750.1

0.1250.15

0.1750.2

Incident pressure - benchmark results 25 Mar 2009 Incident Pressures

Incident pressure (dB)-0.2 -0.1 0 0.1 0.2

-0.2

-0.175-0.15

-0.125

-0.1

-0.075-0.05

-0.0250

0.025

0.050.075

0.10.125

0.15

0.175

0.2

Incident pressure - Test Results 25 Mar 20

Scattered pressure (dB)-20 -15 -10 -5 0 5 10 15 20

-20

-10

0

10

20

Scattered Pressure - benchmark results 25 Mar 2009 Incident Pressures

Scattered pressure (dB)-20 -15 -10 -5 0 5 10 15 20

-20

-10

0

10

20

Scattered Pressure - test results 25 Mar 20

Total pressure (dB)-0.2 -0.15 -0.1 -0.05 0 0.05 0.1 0.15 0.2

-0.2-0.175

-0.15-0.125

-0.1-0.075

-0.05-0.025

00.025

0.050.075

0.10.125

0.15

0.1750.2

Total Pressure - benchmark results 25 Mar 2009 Incident Pressures

Total pressure (dB)-0.2 -0.15 -0.1 -0.05 0 0.05 0.1 0.15 0.2

-0.2-0.175

-0.15-0.125

-0.1-0.075

-0.05-0.025

00.025

0.050.075

0.10.125

0.15

0.1750.2

Total Pressure - test results 25 Ma

Figure 17. Polar Plot of Radiated, Scattered and Total Pressures

DRDC Atlantic CR 2009-112

27

9. Test Case #9: Half Sphere Rigid Yeq2 RadiationP-Inc

Ang

le

-40 -20 0 200

1

2

3

4

5

6

Test Case: halfSphereRigidYeq2Radiation 25 Mar 2009 Incident Pressu

Angle (radians)

Inci

dent

pres

sure

(dB

)

0 1 2 3 4 5 60

0.01

0.02

0.03

0.04

0.05

0.06

0.07

0.08

0.09

0.1

Incident pressure (dB) - benchmark results 25 Mar 2009 Incident Pressures

Angle (radians)

Inci

dent

pres

sure

(dB

)

0 1 2 3 4 5 60

0.01

0.02

0.03

0.04

0.05

0.06

0.07

0.08

0.09

0.1

Incident pressure (dB) - test results 25 Mar 200

Angle (radians)

Sca

ttere

dpr

essu

re(d

B)

0 1 2 3 4 5 60

0.05

0.1

0.15

0.2

0.25

0.3

Scattered pressure (dB) - benchmark results 25 Mar 2009 Incident Pressures

Angle (radians)

Sca

ttere

dpr

essu

re(d

B)

0 1 2 3 4 5 60

0.05

0.1

0.15

0.2

0.25

0.3

Scattered pressure (dB) - Test results 25 Mar

Angle (radians)

Tota

lpre

ssur

e(d

B)

0 1 2 3 4 5 60

0.05

0.1

0.15

0.2

0.25

0.3

Total pressure (dB) - benchmark results 25 Mar 2009 Incident Pressures

Angle (radians)

Tota

lpre

ssur

e(d

B)

0 1 2 3 4 5 60

0.05

0.1

0.15

0.2

0.25

0.3

Total pressure (dB) - test results 25 Mar 20

Figure 18. XY Plot of Radiated, Scattered and Total Pressures

DRDC Atlantic CR 2009-112

28

Test Case: halfSphereRigidYeq2Radiation 25 Mar 2009 No Data Set

Incident pressure (dB)-0.1 -0.05 0 0.05 0.1

-0.1

-0.08

-0.06

-0.04

-0.02

0

0.02

0.04

0.06

0.08

0.1

Incident pressure - benchmark results 25 Mar 2009 Incident Pressures

Incident pressure (dB)-0.1 -0.05 0 0.05 0.1

-0.1

-0.08

-0.06

-0.04

-0.02

0

0.02

0.04

0.06

0.08

0.1

Incident pressure - Test Results 25 Mar 20

Scattered pressure (dB)-0.3 -0.2 -0.1 0 0.1 0.2 0.3

-0.3

-0.25

-0.2

-0.15

-0.1

-0.05

0

0.05

0.1

0.15

0.2

0.25

0.3

Scattered Pressure - benchmark results 25 Mar 2009 Incident Pressures

Scattered pressure (dB)-0.3 -0.2 -0.1 0 0.1 0.2 0.3

-0.3

-0.25

-0.2

-0.15

-0.1

-0.05

0

0.05

0.1

0.15

0.2

0.25

0.3

Scattered Pressure - test results 25 Mar 20

Total pressure (dB)-0.3 -0.2 -0.1 0 0.1 0.2 0.3

-0.3

-0.25

-0.2

-0.15

-0.1

-0.05

0

0.05

0.1

0.15

0.2

0.25

0.3

Total Pressure - benchmark results 25 Mar 2009 Incident Pressures

Total pressure (dB)-0.3 -0.2 -0.1 0 0.1 0.2 0.3

-0.3

-0.25

-0.2

-0.15

-0.1

-0.05

0

0.05

0.1

0.15

0.2

0.25

0.3

Total Pressure - test results 25 Ma

Figure 19. Polar Plot of Radiated, Scattered and Total Pressures

DRDC Atlantic CR 2009-112

29

10. Test Case #10: Half Sphere Rigid Zeq2 BiStatic

Angle (radians)

Sca

ttere

dpr

essu

re(d

B)

0 1 2 3 4 5 6-50

-40

-30

-20

-10

0

Scattered pressure (dB) - benchmark results 25 Mar 2009 Incident Pressures

Angle (radians)

Sca

ttere

dpr

essu

re(d

B)

0 1 2 3 4 5 6-50

-40

-30

-20

-10

0

Scattered pressure (dB) - Test results 25 Mar

Angle (radians)

Inci

dent

pres

sure

(dB

)

0 1 2 3 4 5 60

0.025

0.05

0.075

0.1

0.125

0.15

0.175

0.2

Incident pressure (dB) - benchmark results 25 Mar 2009 Incident Pressures

Angle (radians)

Inci

dent

pres

sure

(dB

)

0 1 2 3 4 5 60

0.025

0.05

0.075

0.1

0.125

0.15

0.175

0.2

Incident pressure (dB) - test results 25 Mar 200

Angle (radians)

Tota

lpre

ssur

e(d

B)

0 1 2 3 4 5 60

0.025

0.05

0.075

0.1

0.125

0.15

0.175

0.2

Total pressure (dB) - benchmark results 25 Mar 2009 Incident Pressures

Angle (radians)

Tota

lpre

ssur

e(d

B)

0 1 2 3 4 5 60

0.025

0.05

0.075

0.1

0.125

0.15

0.175

0.2

Total pressure (dB) - test results 25 Mar 20

P-Inc

Angl

e

-40 -20 0 200

1

2

3

4

5

6

7

Test Case: halfSphereRigidZeq2BiStatic 25 Mar 2009 Incident Pressure

Figure 20. XY Plot of Radiated, Scattered and Total Pressures

DRDC Atlantic CR 2009-112

30

Test Case: halfSphereRigidZeq2BiStatic 25 Mar 2009 No Data Set

Incident pressure (dB)-0.2 -0.1 0 0.1 0.2

-0.2-0.175

-0.15-0.125

-0.1-0.075

-0.05-0.025

0

0.0250.05

0.0750.1

0.1250.15

0.1750.2

Incident pressure - benchmark results 25 Mar 2009 Incident Pressures

Incident pressure (dB)-0.2 -0.1 0 0.1 0.2

-0.2

-0.175-0.15

-0.125

-0.1

-0.075-0.05

-0.0250

0.025

0.050.075

0.10.125

0.15

0.175

0.2

Incident pressure - Test Results 25 Mar 20

Scattered pressure (dB)-20 -15 -10 -5 0 5 10 15 20

-20

-10

0

10

20

Scattered Pressure - benchmark results 25 Mar 2009 Incident Pressures

Scattered pressure (dB)-20 -15 -10 -5 0 5 10 15 20

-20

-10

0

10

20

Scattered Pressure - test results 25 Mar 20

Total pressure (dB)-0.2 -0.15 -0.1 -0.05 0 0.05 0.1 0.15 0.2

-0.2-0.175

-0.15-0.125

-0.1-0.075

-0.05-0.025

00.025

0.050.075

0.10.125

0.15

0.1750.2

Total Pressure - benchmark results 25 Mar 2009 Incident Pressures

Total pressure (dB)-0.2 -0.15 -0.1 -0.05 0 0.05 0.1 0.15 0.2

-0.2-0.175

-0.15-0.125

-0.1-0.075

-0.05-0.025

00.025

0.050.075

0.10.125

0.15

0.1750.2

Total Pressure - test results 25 Ma

Figure 21. Polar Plot of Radiated, Scattered and Total Pressures

DRDC Atlantic CR 2009-112

31

11. Test Case #11: Half Sphere Rigid Zeq2 RadiationP-Inc

Ang

le

-40 -20 0 200

1

2

3

4

5

6

Test Case: halfSphereRigidZeq2Radiation 25 Mar 2009 Incident Pressu

Angle (radians)

Inci

dent

pres

sure

(dB

)

0 1 2 3 4 5 60

0.01

0.02

0.03

0.04

0.05

0.06

0.07

0.08

0.09

0.1

Incident pressure (dB) - benchmark results 25 Mar 2009 Incident Pressures

Angle (radians)

Inci

dent

pres

sure

(dB

)

0 1 2 3 4 5 60

0.01

0.02

0.03

0.04

0.05

0.06

0.07

0.08

0.09

0.1

Incident pressure (dB) - test results 25 Mar 200

Angle (radians)

Sca

ttere

dpr

essu

re(d

B)

0 1 2 3 4 5 60

0.05

0.1

0.15

0.2

0.25

0.3

Scattered pressure (dB) - benchmark results 25 Mar 2009 Incident Pressures

Angle (radians)

Sca

ttere

dpr

essu

re(d

B)

0 1 2 3 4 5 60

0.05

0.1

0.15

0.2

0.25

0.3

Scattered pressure (dB) - Test results 25 Mar

Angle (radians)

Tota

lpre

ssur

e(d

B)

0 1 2 3 4 5 60

0.05

0.1

0.15

0.2

0.25

0.3

Total pressure (dB) - benchmark results 25 Mar 2009 Incident Pressures

Angle (radians)

Tota

lpre

ssur

e(d

B)

0 1 2 3 4 5 60

0.05

0.1

0.15

0.2

0.25

0.3

Total pressure (dB) - test results 25 Mar 20

Figure 22. XY Plot of Radiated, Scattered and Total Pressures

DRDC Atlantic CR 2009-112

32

Test Case: halfSphereRigidZeq2Radiation 25 Mar 2009 No Data Set

Incident pressure (dB)-0.1 -0.05 0 0.05 0.1

-0.1

-0.08

-0.06

-0.04

-0.02

0

0.02

0.04

0.06

0.08

0.1

Incident pressure - benchmark results 25 Mar 2009 Incident Pressures

Incident pressure (dB)-0.1 -0.05 0 0.05 0.1

-0.1

-0.08

-0.06

-0.04

-0.02

0

0.02

0.04

0.06

0.08

0.1

Incident pressure - Test Results 25 Mar 20

Scattered pressure (dB)-0.3 -0.2 -0.1 0 0.1 0.2 0.3

-0.3

-0.25

-0.2

-0.15

-0.1

-0.05

0

0.05

0.1

0.15

0.2

0.25

0.3

Scattered Pressure - benchmark results 25 Mar 2009 Incident Pressures

Scattered pressure (dB)-0.3 -0.2 -0.1 0 0.1 0.2 0.3

-0.3

-0.25

-0.2

-0.15

-0.1

-0.05

0

0.05

0.1

0.15

0.2

0.25

0.3

Scattered Pressure - test results 25 Mar 20

Total pressure (dB)-0.3 -0.2 -0.1 0 0.1 0.2 0.3

-0.3

-0.25

-0.2

-0.15

-0.1

-0.05

0

0.05

0.1

0.15

0.2

0.25

0.3

Total Pressure - benchmark results 25 Mar 2009 Incident Pressures

Total pressure (dB)-0.3 -0.2 -0.1 0 0.1 0.2 0.3

-0.3

-0.25

-0.2

-0.15

-0.1

-0.05

0

0.05

0.1

0.15

0.2

0.25

0.3

Total Pressure - test results 25 Ma

Figure 23. Polar Plot of Radiated, Scattered and Total Pressures

DRDC Atlantic CR 2009-112

33

12. Test Case #12: Kirchhoff Full Capsule 200Hz

Angle (radians)

Inci

dent

pres

sure

(dB

)

0 1 2 3 4 5 60

0.0001

0.0002

0.0003

0.0004

0.0005

0.0006

0.0007

0.0008

0.0009

0.001

Incident pressure (dB) - test results 25 Mar 200

Angle (radians)

Inci

dent

pres

sure

(dB

)

0 1 2 3 4 5 60

0.0001

0.0002

0.0003

0.0004

0.0005

0.0006

0.0007

0.0008

0.0009

0.001

Incident pressure (dB) - benchmark results 25 Mar 2009 Incident PressuresP- Inc

Ang

le

-40 -20 0 200

1

2

3

4

5

6

Test Case: kirchhoffFullCapsule200Hz 25 Mar 2009 Incident Pressures

Angle (radians)

Sca

ttere

dpr

essu

re(d

B)

0 1 2 3 4 5 60

2E-06

4E-06

6E-06

8E-06

1E-05

1.2E-05

1.4E-05

1.6E-05

1.8E-05

2E-05

Scattered pressure (dB) - benchmark results 25 Mar 2009 Incident Pressures

Angle (radians)

Sca

ttere

dpr

essu

re(d

B)

0 1 2 3 4 5 60

2E-06

4E-06

6E-06

8E-06

1E-05

1.2E-05

1.4E-05

1.6E-05

1.8E-05

2E-05

Scattered pressure (dB) - Test results 25 Mar

Angle (radians)

Tota

lpre

ssur

e(d

B)

0 1 2 3 4 5 60

5

10

15

20

25

30

Total pressure (dB) - benchmark results 25 Mar 2009 Incident Pressures

Angle (radians)

Tota

lpre

ssur

e(d

B)

0 1 2 3 4 5 60

5

10

15

20

25

30

Total pressure (dB) - test results 25 Mar 20

Figure 24. XY Plot of Radiated, Scattered and Total Pressures

DRDC Atlantic CR 2009-112

34

Incident pressure (dB)-0.001 -0.0005 0 0.0005 0.001

-0.001

-0.00075

-0.0005

-0.00025

0

0.00025

0.0005

0.00075

0.001

Incident pressure - benchmark results 25 Mar 2009 Incident Pressures

Incident pressure (dB)-0.001 -0.0005 0 0.0005 0.001

-0.001

-0.00075

-0.0005

-0.00025

0

0.00025

0.0005

0.00075

0.001

Incident pressure - Test Results 25 Mar 20

Test Case: kirchhoffFullCapsule200Hz 25 Mar 2009 No Data Set

Scattered pressure (dB)-2E-05 -1E-05 0 1E-05 2E-05

-2E-05

-1.5E-05

-1E-05

-5E-06

0

5E-06

1E-05

1.5E-05

2E-05

Scattered Pressure - benchmark results 25 Mar 2009 Incident Pressures

Scattered pressure (dB)-2E-05 -1E-05 0 1E-05 2E-05

-2E-05

-1.5E-05

-1E-05

-5E-06

0

5E-06

1E-05

1.5E-05

2E-05

Scattered Pressure - test results 25 Mar 20

Total pressure (dB)-30 -20 -10 0 10 20 30

-30

-20

-10

0

10

20

30

Total Pressure - benchmark results 25 Mar 2009 Incident Pressures

Total pressure (dB)-30 -20 -10 0 10 20 30

-30

-20

-10

0

10

20

30

Total Pressure - test results 25 Ma

Figure 25. Polar Plot of Radiated, Scattered and Total Pressures

DRDC Atlantic CR 2009-112

35

13. Test Case #13: Kirchhoff Half Capsule Y Symm200Hz

Angle (radians)

Inci

dent

pres

sure

(dB

)

0 1 2 3 4 5 60

0.0001

0.0002

0.0003

0.0004

0.0005

0.0006

0.0007

0.0008

0.0009

0.001

Incident pressure (dB) - benchmark results 25 Mar 2009 Incident PressuresP-Inc

Ang

le

-40 -20 0 200

1

2

3

4

5

6

Test Case: KirchhoffHalfCapsuleYSymm200Hz 25 Mar 2009 Incident P

Angle (radians)

Inci

dent

pres

sure

(dB

)

0 1 2 3 4 5 60

0.0001

0.0002

0.0003

0.0004

0.0005

0.0006

0.0007

0.0008

0.0009

0.001

Incident pressure (dB) - test results 25 Mar 200

Angle (radians)

Sca

ttere

dpr

essu

re(d

B)

0 1 2 3 4 5 60

2E-06

4E-06

6E-06

8E-06

1E-05

1.2E-05

1.4E-05

1.6E-05

1.8E-05

2E-05

Scattered pressure (dB) - benchmark results 25 Mar 2009 Incident Pressures

Angle (radians)

Sca

ttere

dpr

essu

re(d

B)

0 1 2 3 4 5 60

2E-06

4E-06

6E-06

8E-06

1E-05

1.2E-05

1.4E-05

1.6E-05

1.8E-05

2E-05

Scattered pressure (dB) - Test results 25 Mar

Angle (radians)

Tota

lpre

ssur

e(d

B)

0 1 2 3 4 5 60

5

10

15

20

25

30

Total pressure (dB) - benchmark results 25 Mar 2009 Incident Pressures

Angle (radians)

Tota

lpre

ssur

e(d

B)

0 1 2 3 4 5 60

5

10

15

20

25

30

Total pressure (dB) - test results 25 Mar 20

Figure 26. XY Plot of Radiated, Scattered and Total Pressures

DRDC Atlantic CR 2009-112

36

Incident pressure (dB)-0.001 -0.0005 0 0.0005 0.001

-0.001

-0.00075

-0.0005

-0.00025

0

0.00025

0.0005

0.00075

0.001

Incident pressure - benchmark results 25 Mar 2009 Incident Pressures

Incident pressure (dB)-0.001 -0.0005 0 0.0005 0.001

-0.001

-0.00075

-0.0005

-0.00025

0

0.00025

0.0005

0.00075

0.001

Incident pressure - Test Results 25 Mar 20

Test Case: KirchhoffHalfCapsuleYSymm200Hz 25 Mar 2009 No Data S

Scattered pressure (dB)-2E-05 -1E-05 0 1E-05 2E-05

-2E-05

-1.5E-05

-1E-05

-5E-06

0

5E-06

1E-05

1.5E-05

2E-05

Scattered Pressure - benchmark results 25 Mar 2009 Incident Pressures

Scattered pressure (dB)-2E-05 -1E-05 0 1E-05 2E-05

-2E-05

-1.5E-05

-1E-05

-5E-06

0

5E-06

1E-05

1.5E-05

2E-05

Scattered Pressure - test results 25 Mar 20

Total pressure (dB)-30 -20 -10 0 10 20 30

-30

-20

-10

0

10

20

30

Total Pressure - benchmark results 25 Mar 2009 Incident Pressures

Total pressure (dB)-30 -20 -10 0 10 20 30

-30

-20

-10

0

10

20

30

Total Pressure - test results 25 Ma

Figure 27. Polar Plot of Radiated, Scattered and Total Pressures

DRDC Atlantic CR 2009-112

37

14. Test Case #14: Quarter Sphere RadiationP-Inc

Ang

le

-40 -20 0 200

1

2

3

4

5

6

7

8Test Case: quarterSphereRadiation 25 Mar 2009 Incident Pressures

Angle (radians)

Inci

dent

pres

sure

(dB

)

0 1 2 3 4 5 60

0.01

0.02

0.03

0.04

0.05

0.06

0.07

0.08

0.09

0.1

Incident pressure (dB) - benchmark results 25 Mar 2009 Incident Pressures

Angle (radians)

Inci

dent

pres

sure

(dB

)

0 1 2 3 4 5 60

0.01

0.02

0.03

0.04

0.05

0.06

0.07

0.08

0.09

0.1

Incident pressure (dB) - test results 25 Mar 200

Angle (radians)

Sca

ttere

dpr

essu

re(d

B)

0 1 2 3 4 5 60

0.05

0.1

0.15

0.2

0.25

0.3

Scattered pressure (dB) - benchmark results 25 Mar 2009 Incident Pressures

Angle (radians)

Sca

ttere

dpr

essu

re(d

B)

0 1 2 3 4 5 60

0.05

0.1

0.15

0.2

0.25

0.3

Scattered pressure (dB) - Test results 25 Mar

Angle (radians)

Tota

lpre

ssur

e(d

B)

0 1 2 3 4 5 60

0.05

0.1

0.15

0.2

0.25

0.3

Total pressure (dB) - benchmark results 25 Mar 2009 Incident Pressures

Angle (radians)

Tota

lpre

ssur

e(d

B)

0 1 2 3 4 5 60

0.05

0.1

0.15

0.2

0.25

0.3

Total pressure (dB) - test results 25 Mar 20

Figure 28. XY Plot of Radiated, Scattered and Total Pressures

DRDC Atlantic CR 2009-112

38

Test Case: quarterSphereRadiation 25 Mar 2009 No Data Set

Incident pressure (dB)-0.1 -0.05 0 0.05 0.1

-0.1

-0.08

-0.06

-0.04

-0.02

0

0.02

0.04

0.06

0.08

0.1

Incident pressure - benchmark results 25 Mar 2009 Incident Pressures

Incident pressure (dB)-0.1 -0.05 0 0.05 0.1

-0.1

-0.08

-0.06

-0.04

-0.02

0

0.02

0.04

0.06

0.08

0.1

Incident pressure - Test Results 25 Mar 20

Scattered pressure (dB)-0.3 -0.2 -0.1 0 0.1 0.2 0.3

-0.3

-0.25

-0.2

-0.15

-0.1

-0.05

0

0.05

0.1

0.15

0.2

0.25

0.3

Scattered Pressure - benchmark results 25 Mar 2009 Incident Pressures

Scattered pressure (dB)-0.3 -0.2 -0.1 0 0.1 0.2 0.3

-0.3

-0.25

-0.2

-0.15

-0.1

-0.05

0

0.05

0.1

0.15

0.2

0.25

0.3

Scattered Pressure - test results 25 Mar 20

Total pressure (dB)-0.3 -0.2 -0.1 0 0.1 0.2 0.3

-0.3

-0.25

-0.2

-0.15

-0.1

-0.05

0

0.05

0.1

0.15

0.2

0.25

0.3

Total Pressure - benchmark results 25 Mar 2009 Incident Pressures

Total pressure (dB)-0.3 -0.2 -0.1 0 0.1 0.2 0.3

-0.3

-0.25

-0.2

-0.15

-0.1

-0.05

0

0.05

0.1

0.15

0.2

0.25

0.3

Total Pressure - test results 25 Ma

Figure 29. Polar Plot of Radiated, Scattered and Total Pressures

DRDC Atlantic CR 2009-112

DOCUMENT CONTROL DATA (Security classification of title, body of abstract and indexing annotation must be entered when the overall document is classified)

1. ORIGINATOR (the name and address of the organization preparing the document..Organizations for whom the document was prepared, e.g. Centre sponsoring a contractor'sreport, or tasking agency, are entered in section 8.)

Martec Limited1888 Brunswick Street, Suite 400Halifax, Nova Scotia B3J 3J8

2. SECURITY CLASSIFICATION (overall security classification of the documentincluding special warning terms if applicable).

UNCLASSIFIED

3. TITLE (the complete document title as indicated on the title page. Its classification should be indicated by the appropriate abbreviation (S,C,R or U) in parentheses after the title).

AVAST 2009 User’s Guide for the AVAST Autotester

4. AUTHORS (Last name, first name, middle initial. If military, show rank, e.g. Doe, Maj. John E.)

Brennan, D.; Watanabe, R

5. DATE OF PUBLICATION (month and year of publication ofdocument)

August 2009

6a. NO .OF PAGES (total containing information Include Annexes, Appendices, etc). 54

6b. NO. OF REFS (total cited in document)

0

7. DESCRIPTIVE NOTES (the category of the document, e.g. technical report, technical note or memorandum. If appropriate, enter the type of report, e.g. interim, progress, summary, annual or final. Give the inclusive dates when a specific reporting period is covered).

CONTRACT REPORT

8. SPONSORING ACTIVITY (the name of the department project office or laboratory sponsoring the research and development. Include address).Defence R&D Canada - AtlanticPO Box 1012Dartmouth, NS, Canada B2Y 3Z7

9a. PROJECT OR GRANT NO. (if appropriate, the applicable research and development project or grant number under which the document was written. Please specify whether project or grant).

Project 11cd

9b. CONTRACT NO. (if appropriate, the applicable number under which the document was written).

W7707-088100

10a ORIGINATOR'S DOCUMENT NUMBER (the official document number by which the document is identified by the originating activity. This number must be unique to this document.)

DRDC Atlantic CR 2009-112

10b OTHER DOCUMENT NOs. (Any other numbers which may be assigned this document either by the originator or by the sponsor.)

11. DOCUMENT AVAILABILITY (any limitations on further dissemination of the document, other than those imposedby security classification)( x ) Unlimited distribution( ) Canadian Defence department and defence contractors; further distribution only as approved ( ) Defence departments and Canadian defence contractors; further distribution only as approved ( ) Government departments and agencies; further distribution only as approved ( ) Defence departments; further distribution only as approved ( ) Other (please specify):

12. DOCUMENT ANNOUNCEMENT (any limitation to the bibliographic announcement of this document. This will normally correspond to theDocument Availability (11). However, where further distribution (beyond the audience specified in (11) is possible, a wider announcement audiencemay be selected).

Unlimited

(NON-CONTROLLED GOODS)DMC AREVIEW: GCEC December 2013

13. ABSTRACT (a brief and factual summary of the document. It may also appear elsewhere in the body of the document itself. It is highly desirable that the abstract of classified documents be unclassified. Each paragraph of the abstract shall begin with an indicationof the security classification of the information in the paragraph (unless the document itself is unclassified) represented as (S), (C), (R), or (U). It is not necessary to include here abstracts in both official languages unless the text is bilingual).

The AVAST software was developed to predict underwater radiated noise and acoustic target strength of ships and submarines. Over the last several years the AVAST code has undergone significant modifications and upgrades. At this point in the software development cycle, it is necessary for the software to undergo a rigorous series of regression tests to ensure the entire suite of analysis features is still operating properly.

A series of benchmark test cases has been developed to validate the AVAST software after any significant modifications are made to the code. To aid in the evaluation of the testing, an autotester was developed to automate the process of running the test models, comparing the new results to the benchmark results, and generating reports.

Additional benchmark test cases will be added as the analysis features of the software are upgraded. It is suggested that the AVAST software should be modified to generate standardized output files in Tecplot format. This approach would eliminate the need for codes to translate the data into the format necessary to plot the results for comparison with the benchmark results.

14. KEYWORDS, DESCRIPTORS or IDENTIFIERS (technically meaningful terms or short phrases that characterize a document and could be helpful in cataloguing the document. They should be selected so that no security classification is required. Identifiers, such as equipment model designation, trade name, military project code name, geographic location may also be included.If possible keywords should be selected from a published thesaurus. e.g. Thesaurus of Engineering and Scientific Terms (TEST) and that thesaurus-identified. If it not possible to select indexing terms which are Unclassified, the classification of each should be indicated as with the title).

AVAST; Acoustic Radiation; Target Strength; Benchmark; Test cases

Le logiciel AVAST a été conçu pour prédire le niveau de bruit transmis par rayonnement sous-marin et déterminer l’indice de réflexion acoustique des navires et des sous-marins. Au cours des dernières années, le code du logiciel AVAST a subi des modifications et des mises à niveau importantes. Au moment présent du cycle de développement du logiciel, AVAST doit subir une série d’essais de régression rigoureux pour s’assurer que toutes les caractéristiques d’analyse fonctionnent correctement.

Une série de tests de performance a été mise au point afin de valider le logiciel AVAST une fois que toutes les modifications importantes au code auront été apportées. Pour contribuer à l’évaluation de ces tests, on a conçu un testeur automatique capable d’automatiser le processus d’évaluation des tests modèles, la comparaison de nouveaux résultats et de résultats des tests de performance et la création de rapports.

Des tests de performance supplémentaires seront ajoutés à mesure que les caractéristiques d’analyse du logiciel seront mises à niveau. On a proposé de modifier le logiciel AVAST de manière à créer des fichiers de sortie normalisés en format Tecplot. Cette modification éliminerait la nécessité d’utiliser des codes pour convertir les données vers un format cible aux fins de représentation graphique des résultats et de comparaison avec les résultats des tests de performance.

Defence R&D Canada R & D pour la défense Canada

Canada's Leader in Defence and National Security

Science and Technology

Chef de file au Canada en matière de science et de technologie pour la défense et la sécurité nationale

www.drdc-rddc.gc.ca


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