蜂窝夹层板封闭声腔的结构—声耦合特性分析

摘要

The structural -acoustic coupling mechanism, characteristics, effect of system parameters on structural-acoustic coupling degree and on eigenfrequency of the system were analyzed theoretically. The eigenfrequency of the coupled system was estimated. The theoretical model and calcula-tional methods were validated by comparing with available results. The influence of structural parameters of honeycomb sandwich panel on the sound pressure response in cavity was then studied systematically. The analysis results demonstrate that increase in thickness of face sheet and core is propitious to reduction of sound pressure response in cavity under the restriction of total mass and the fundamental frequency of structure.%对弹性板封闭声腔的结构—声耦合机制、耦合特性、影响耦合程度的系统参数及其对系统固有频率的影响进行了深入的理论分析,并对耦合系统固有频率进行了估计,通过与已有文献结果的比较对所提出的分析模型和计算方法进行了验证,在此基础上分析了夹层板结构参数对腔内声压响应的影响.结果表明:在满足结构质量和第一阶固有频率约束的前提下,适当增大面板厚度和芯层厚度有利于降低腔内声压响应.