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| Numerical Analysis of Random Vibro-acoustic Based on Finite Element Method |
| Received:February 04, 2021 Revised:February 16, 2021 |
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| DOI：10.7643/issn.1672-9242.2021.03.006 |
| KeyWord:finite element method random vibration noise harmonic analysis frequencies response function power spectrum |
| Author | Institution |
| WU Lian-jun |
Institute of System Engineering, China Academy of Engineering Physics, Mianyang , China |
| CHEN Hong-yong |
Institute of System Engineering, China Academy of Engineering Physics, Mianyang , China |
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| Abstract: |
| In order to realize the numerical analysis of random vibro-acoustic. First, a dynamic model of acoustic-structure direct coupling is built based on the dynamic finite element method about acoustic-structural interaction, the frequencies response function of structural was analyzed based on a direct harmonic analysis method. Then, the Power Spectrum Density curve on random excitation is indirect get through the frequencies response function. An analysis of random vibro-acoustic is simulated in 10~5000 Hz based on the method. |
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