Full-Frequency Vibroacoustic Modeling of a Ballistic Re-Entry Aeroshell and Validation through Diffuse Field Acoustic Testing
During ballistic flight, a re-entry vehicle is subjected to high-level structural vibrations due to pressure fluctuations on its bounding surface. The aim of this work is to simulate this structural vibration response. The first step, which is not covered in this study, is the modeling of pressure f...
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| Format: | Article |
| Language: | English |
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MDPI AG
2022-05-01
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| Series: | Applied Sciences |
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| Online Access: | https://www.mdpi.com/2076-3417/12/11/5397 |
| _version_ | 1797494271050252288 |
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| author | Maxence Claeys Hélène Valle Canas Benoit Alcoverro |
| author_facet | Maxence Claeys Hélène Valle Canas Benoit Alcoverro |
| author_sort | Maxence Claeys |
| collection | DOAJ |
| description | During ballistic flight, a re-entry vehicle is subjected to high-level structural vibrations due to pressure fluctuations on its bounding surface. The aim of this work is to simulate this structural vibration response. The first step, which is not covered in this study, is the modeling of pressure fluctuations using aerodynamic simulation results. The second step is the simulation of the vibroacoustic response. In this study, the full-frequency vibroacoustic modeling of a metal shell representing a re-entry vehicle aeroshell is developed. The low-frequency response is computed using a FEM–BEM model while Statistical Energy Analysis is used for high-frequency behavior. The validation of these models is based on a ground experiment with controlled diffuse-field acoustic loading. A dedicated reverberation chamber was developed with loudspeaker excitation. The simulation results are compared with the experimental results. In the low-frequency range, simulation helps to understand the measured response spectra by highlighting the acoustic resonances and scattering phenomena. In the high-frequency range, an experimental identification of the damping loss factors and SEA modeling of each subsystem using an FE–SEA approach provides a predictive simulation of the vibration-response spectrum. In this application, FEM–BEM and SEA models are complementary in simulating full-frequency vibroacoustic responses. |
| first_indexed | 2024-03-10T01:31:57Z |
| format | Article |
| id | doaj.art-bdc50c57122947d485bda7e88170aae9 |
| institution | Directory Open Access Journal |
| issn | 2076-3417 |
| language | English |
| last_indexed | 2024-03-10T01:31:57Z |
| publishDate | 2022-05-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Applied Sciences |
| spelling | doaj.art-bdc50c57122947d485bda7e88170aae92023-11-23T13:41:01ZengMDPI AGApplied Sciences2076-34172022-05-011211539710.3390/app12115397Full-Frequency Vibroacoustic Modeling of a Ballistic Re-Entry Aeroshell and Validation through Diffuse Field Acoustic TestingMaxence Claeys0Hélène Valle Canas1Benoit Alcoverro2CEA/CESTA, 15 Avenue des Sablières, CS60001, 33114 Le Barp, FranceCEA/CESTA, 15 Avenue des Sablières, CS60001, 33114 Le Barp, FranceCEA/CESTA, 15 Avenue des Sablières, CS60001, 33114 Le Barp, FranceDuring ballistic flight, a re-entry vehicle is subjected to high-level structural vibrations due to pressure fluctuations on its bounding surface. The aim of this work is to simulate this structural vibration response. The first step, which is not covered in this study, is the modeling of pressure fluctuations using aerodynamic simulation results. The second step is the simulation of the vibroacoustic response. In this study, the full-frequency vibroacoustic modeling of a metal shell representing a re-entry vehicle aeroshell is developed. The low-frequency response is computed using a FEM–BEM model while Statistical Energy Analysis is used for high-frequency behavior. The validation of these models is based on a ground experiment with controlled diffuse-field acoustic loading. A dedicated reverberation chamber was developed with loudspeaker excitation. The simulation results are compared with the experimental results. In the low-frequency range, simulation helps to understand the measured response spectra by highlighting the acoustic resonances and scattering phenomena. In the high-frequency range, an experimental identification of the damping loss factors and SEA modeling of each subsystem using an FE–SEA approach provides a predictive simulation of the vibration-response spectrum. In this application, FEM–BEM and SEA models are complementary in simulating full-frequency vibroacoustic responses.https://www.mdpi.com/2076-3417/12/11/5397vibroacoustic simulationdiffuse acoustic field testingFEMBEMSEA |
| spellingShingle | Maxence Claeys Hélène Valle Canas Benoit Alcoverro Full-Frequency Vibroacoustic Modeling of a Ballistic Re-Entry Aeroshell and Validation through Diffuse Field Acoustic Testing Applied Sciences vibroacoustic simulation diffuse acoustic field testing FEM BEM SEA |
| title | Full-Frequency Vibroacoustic Modeling of a Ballistic Re-Entry Aeroshell and Validation through Diffuse Field Acoustic Testing |
| title_full | Full-Frequency Vibroacoustic Modeling of a Ballistic Re-Entry Aeroshell and Validation through Diffuse Field Acoustic Testing |
| title_fullStr | Full-Frequency Vibroacoustic Modeling of a Ballistic Re-Entry Aeroshell and Validation through Diffuse Field Acoustic Testing |
| title_full_unstemmed | Full-Frequency Vibroacoustic Modeling of a Ballistic Re-Entry Aeroshell and Validation through Diffuse Field Acoustic Testing |
| title_short | Full-Frequency Vibroacoustic Modeling of a Ballistic Re-Entry Aeroshell and Validation through Diffuse Field Acoustic Testing |
| title_sort | full frequency vibroacoustic modeling of a ballistic re entry aeroshell and validation through diffuse field acoustic testing |
| topic | vibroacoustic simulation diffuse acoustic field testing FEM BEM SEA |
| url | https://www.mdpi.com/2076-3417/12/11/5397 |
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