统计能量分析方法声振预测应用研究  

Vibroacoustic applications of statistical energy analysis method

作　　者：刘海生[1] 杨春庄[1] 陈士杰[1] 

机构地区：[1]同济大学声学研究所,上海200092

出　　处：《声学技术》2010年第2期192-197,共6页Technical Acoustics

基　　金：国家自然科学基金项目(10774114)

摘　　要：从声振系统激励和响应的频谱特征、预测模型的特点、精度等方面总结了统计能量分析方法(SEA)在多个领域内的应用成果,得出了含有声子系统的双壳和单壳系统是两种基本的SEA声振预测模型的结论。该系统的特点是内外的声能交换须通过声振耦合来实现,当激发的声波频率低于双壳的共振频率时,双壳系统转化为单壳系统。深入讨论了影响其SEA模型预测精度的主要因素是结构子系统的划分方式、统计能量分析参数的测量,以及有界空间内声振耦合损耗因子的正确计算。The achievements of applying Statistical Energy Analysis（SEA） Method in many fields have been summarized from the view points of the system excitation, feature of frequency response, prediction model and precision.It has been put forward that the double and single shell models containing acoustic subsystem are the basic types of sound and vi-bration coupling system.The feature of such systems is that the inside and outside sound field exchanges energy by sound-vibration coupling.The double system converts to a single system while the frequency of exciting sound lower than the resonant frequency of double shell.The main elements to influent the precision of such SEA models is division of subsystem, measurement of SEA parameters and coupling loss factor between sound field and vibration.

关 键 词：统计能量分析 声振耦合 共振传输 非共振传输 辐射比 

分 类 号：TB532[理学—物理]