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| Influences of Thermal Effect on High-frequency Vibro-acoustic Response Based on Statistical Energy Analysis |
| Received:March 21, 2015 Revised:September 25, 2018 |
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| DOI：10.7643/ issn.1672-9242.2018.09.009 |
| KeyWord:thermal effect statistical energy analysis coupling loss factor finite element method |
| Author | Institution |
| WANG Yong-yan |
AVIC Chengdu Aircraft Design & Research Institute, Chengdu , China |
| JIN Wei |
AVIC Chengdu Aircraft Design & Research Institute, Chengdu , China |
| FU Huan-bing |
AVIC Chengdu Aircraft Design & Research Institute, Chengdu , China |
| HUANG Hu |
AVIC Chengdu Aircraft Design & Research Institute, Chengdu , China |
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| Abstract: |
| Objective To study influences of thermal effect on three important parameters in Statistical Energy Analysis (SEA). Methods Finite element method (FEM) and widely-used wave method were used to analyze and calculate CLF. High frequency acoustic vibration response analysis was carried out under the three working conditions (only the working conditions of variable material parameters was considered; only the working conditions affected by thermal stress was considered; the working conditions of variable material parameters and thermal stress effect were comprehensively considered) with the above two calculation methods, and influences of thermal effect on the coupling loss factor of L-plate were studied. Results The calculated results of both were basically identical. The temperature change had certain influences on CLF, but the influences were limited. Relatively speaking, the influences in low-frequency section were obvious; and the influences in high-frequency section were relatively small. Conclusion In 400 - 5000 Hz frequency range, FEM is used to calculate the coupling loss factor. The calculation results are basically identical with that of the wave method. This proves the validity of it. |
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