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| Analysis of Response Coupling of Plate Shell Structure under Vibro-acoustic Test |
| Received:November 03, 2023 Revised:March 11, 2024 |
| View Full Text View/Add Comment Download reader |
| DOI：10.7643/issn.1672-9242.2024.04.011 |
| KeyWord:vibro-acoustic test plate shell structure environmental load crossing frequency response prediction extremum envelope method |
| Author | Institution |
| ZHANG Xuecheng |
Third Military Representative Office of Army Equipment Department in Shanghai, Shanghai , China |
| YAN Jinzhen |
Shanghai Electro-Mechanical Institute, Shanghai , China |
| ZHANG Baogang |
Shanghai Electro-Mechanical Institute, Shanghai , China |
| QIN Xufeng |
Southwest Institute of Technology and Engineering, Chongqing , China |
| SUN Xiaofeng |
Shanghai Spaceflight Precision Machinery Institute, Shanghai , China |
| WU Junhui |
Shanghai Spaceflight Precision Machinery Institute, Shanghai , China |
| ZHANG Guojun |
Shanghai Spaceflight Precision Machinery Institute, Shanghai , China |
| LIU Luguang |
Shanghai Electro-Mechanical Institute, Shanghai , China |
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| Abstract: |
| The work aims to propose an engineering method with practical significance to predict the response of plate shell structure under vibro-acoustic coupling. Based on the response curves of noise test, vibration test and vibro-acoustic test, the response coupling law of plate shell structure under simultaneous excitation of noise and vibration was analyzed, and the response distribution of plate shell structure under vibro-acoustic test was predicted according to the response extremum envelope method of noise test and vibration test. The response curve of vibro-acoustic test was approximately the maximum envelope line of the noise test and vibration test. The surface excitation of noise and the basic excitation of random vibration mainly impacted the structural response in different frequency ranges. Response curves of noise test and vibration test intersected at the given frequency point. The response of vibro-acoustic test below the crossing frequency was highly consistent with the result of vibration test, while the response above the crossing frequency was mainly similar to the noise test. Based on these results, the extremum envelope method can be used to predict the response of plate shell structure under vibro-acoustic test by the response data of noise test and vibration test in engineering practices. In addition, the response superposition method is more suitable because it is difficult to obtain the crossing frequency in advance. |
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