薄壁板结构声激励载荷作用下的响应谱估算方法

Estimation of response Power Spectrum of Panel Structure under Acoustic Loads

本文提出一种估算薄壁板结构在声激励载荷作用下的响应谱的方法。这一方法借助板式结构的线性振动理论 ,研究薄壁板结构在声激励载荷作用下动力响应问题 ,引入结合受纳函数来考虑结构模态的波长和声波长在空间的耦合程度。本文给出的估算薄壁板结构声激励响应的方法 ,不仅对规则的几何结构有效 ,而且也应用于复杂薄壁板结构的分析。并将估算的结果与实验值做出了比较 ,较为吻合。

An estimation of the response of panel structure under acoustic loads is based on the linear vibration theory and research of the dynamic response of panel structure.The joint acceptance has been used to consider the relative effect between the acoustic wavelength and the structure modal wavelength.The method is able not only for a single panel but also for complexity panel structure.This method is based on modal analysis,and the contribution of each modal is taken into account.The coupling degree between acoustic wave length and structure modal wavelength is considered,finally the total response spectrum of panel structure has been obtained.