矩形域声—固耦合系统的分析方法  

Analysis Method of Structure-acoustic Coupled Systems

作　　者：陈琪[1] 刘丽娟[1] 连磊磊[1] 高勇[1] 

机构地区：[1]中国地质大学(武汉)机械与电子信息学院,武汉430000

出　　处：《噪声与振动控制》2013年第5期41-44,共4页Noise and Vibration Control

摘　　要：运用特征值与模态展开法相结合的方法,研究双向耦合结构-声场系统;分析声学和结构耦合响应;讨论结构驱动点阻抗与声介质特性阻抗比率和声—固耦合引起声波共振频率的变化之间的关系,提出了以声-固耦合引起声波共振频率的变化作为判据,判断何时采用双向耦合分析方法。Analysis method of a two-way structure-acoustic coupled system was studied in this paper. The particular solution approach and the modal expansion method were applied to solve the structure-acoustic coupled system. Numerical results of the modals of the system, which show the acoustic dominance and structural resonance, were presented. The relation between the ratio of structural driving-point impedance to acoustic characteristic impedance and the change of resonant frequencies due to the structure-acoustic coupling effect was discussed. It is found that the change of structural resonant frequencies reaches the peak value when the impedance ratio is unity. This change can be used as a criterion to decide when the two-way coupled analysis becomes applicable.

关 键 词：声学 声-固耦合系统 频率 模态形式 

分 类 号：TB123[理学—工程力学] TB533[理学—力学]