基于模态展开法的二维消声器传递损失分析  

Transmission loss analysis of two-dimensional mufflers based on modal expansion method

作　　者：林力[1] 张旭[1] 李云[1] 程光旭[1] 

机构地区：[1]西安交通大学能源与动力工程学院,西安710049

出　　处：《振动与冲击》2011年第11期161-164,174,共5页Journal of Vibration and Shock

基　　金：香港理工大学联合内地;台湾;澳门高校培养博士生基金(A-PB0Q)

摘　　要：运用模态展开法通过求解矩形和圆柱形二维消声器的压力响应函数以及其相应的四极参数,推导了这些消声器模型的传递损失计算模型。采用此模型计算了二维圆柱形消声器的传递损失,并建立了三维有限元模型验证了该模型的正确性。通过与格林函数法比较传递损失能量计算结果,表明在面源尺寸相对较大时,采用该模型具有更高的计算精度。The pressure response functions and the corresponding four-pole parameters of two-dimensional rectangular and cylindrical mufflers were obtained by using modal expansion method.Transmission loss（TL） calculation model for different shape mufflers was derived.In order to verify the calculation model,the TL results of a two-dimensional cylindrical muffler obtained by the proposed model were verified by comparing with the results obtained by the three-dimensional finite element method.It is demonstrated that the proposed model is more computationally efficient than the finite element method with adequate computational accuracy.The model is more accurate if the area of the surface source is comparatively large,comparing with the TL results by Green＇s function method.

关 键 词：传递损失 四极参数 二维消声器 模态展开法 

分 类 号：O348.8[理学—固体力学]