基于背腔的矩形板的声振耦合分析  

Structural-Acoustic Coupling Analysis of Rectangular Panel Backed by a Rectangular Cavity

作　　者：彭彬彬[1] 黄协清[1] 吴成军[1] 

机构地区：[1]西安交通大学机械工程学院振动与噪声控制研究所,陕西西安710049

出　　处：《中北大学学报（自然科学版）》2007年第5期407-411,共5页Journal of North University of China(Natural Science Edition)

基　　金：国家自然科学基金资助项目（5005015）

摘　　要：运用模态综合方法,推导了基于封闭矩形腔体的弹性板的自由振动解;利用数值方法,验证了理论模型的正确性;分析了影响耦合板腔耦合系统的关键结构参数,弹性板的厚度和腔体的深度对板振动的影响.数值计算表明:弹性板的厚度和腔体的深度两参数的增加都能够有效降低系统的耦合程度,在板腔系统的强耦合区,腔体的深度比板厚度对耦合频率的影响较大,在弱耦合区域,两者的影响趋于相同.Modal synthesis approach is presented to deduce a theoretical solution for the free vibration of flexible panel backed by a closed rectangular cavity. The numerical method validates the validity of theoretical mode. Key parameters, the depth of cavity and thick of panel, are the crucial structural parameters influencing the structural-acoustic analysis of rectangular panel. It is concluded that the coupling degree is reduced along with the increasing of panel thick and the cavity depth. In the strong coupling region, the coupling frequency is depended much on cavity depth than the panel thick does. In the weak coupling region, the influence of panel thick and cavity depth are inclined to identical.

关 键 词：腔体 板 声振耦合 

分 类 号：TH113.1[机械工程—机械设计及理论] O327[理学—一般力学与力学基础]