结构声腔耦合系统频率耦合机理探讨  

Frequency coupling mechanism of structural-acoustic coupled system

作　　者：邓兆祥[1] 高书娜[1,2] 

机构地区：[1]重庆大学机械传动国家重点实验室,重庆400030 [2]西南大学工程技术学院,重庆400716

出　　处：《振动与冲击》2012年第14期11-15,共5页Journal of Vibration and Shock

基　　金：国家高技术发展计划/863计划(2006AA110102);中央高校基本科研业务费资助(CDJXS11110005)

摘　　要：给出结构和声腔耦合系统的振型耦合特点,选择几阶典型结构声腔模态,计算分析耦合系统固有频率的分布特性;分析论证耦合系统固有频率的主导特性判断准则;基于该准则深入分析耦合系统固有频率的主导特性,从而揭示结构声腔的频率耦合机理。The mode shape coupling characteristics of structures and acoustic modes were selected to calculate and frequencies. Then the judgment criterions for the domination structural-acoustic coupled system were introduced. Typical analyze the distribution features of coupled system＇s natural features of coupled frequency were discussed and verified. Based on the judgment criterions, the domination features of coupled system＇s natural frequencies were deeply analysed. The frequency coupling mechanism of structural-acoustic coupled system was revealed.

关 键 词：结构声腔耦合系统 振型耦合系数 耦合频率分布特性 耦合频率主导特性 

分 类 号：U467.493[机械工程—车辆工程]