基于统计能量法的声场-结构耦合模型高频振动隔振分析

Analysis on high frequency vibration isolation of coupled sound cavity-structure model based on statistical energy method

应用统计能量法软件计算高频域卫星的声场-结构耦合响应,并设计被动隔振与主动式有效载荷适配器相结合的减振方案。利用有限元建模和AutoSEA仿真进行减振模拟分析,证明综合隔振方案的提出有效减弱了各阶模态频率上的振动响应,同时也消除了声场振动声压的波动峰值。且充分说明AutoSEA仿真计算对于高频声场-结构耦合问题的可行性与准确性。

Statistical energy analysis(SEA) was adopted to analyze the coupled response of sound cavity-structure model at high frequency bands.The launch vehicle was designed and the isolators and active payload adapter were added to isolate the axial/lateral vibration.The finite element modeling and AutoSEA simulation were combined in the analysis.It is demonstrated that there is obvious decrease of the vibration response of each frequency as well as the peak value of sound pressure.The significance of statistical energy analysis on high frequency model is fully illustrated by the final result.