某消声器声辐射仿真分析与形貌优化  

Simulative Analysis on Sound Radiation of a Muffler and Topography Optimization

作　　者：贺岩松[1,2] 杨益[2] 赵曌[2] 孙风建[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]重庆大学机械工程学院,重庆400030

出　　处：《机械科学与技术》2015年第1期113-117,共5页Mechanical Science and Technology for Aerospace Engineering

基　　金：国家自然科学基金项目(50975296)资助

摘　　要：先通过模态分析与传递函数研究了某款消声器的动态性能,其次采用结构有限元与声学边界元耦合分析计算了消声器辐射噪声并与排气噪声进行比较,说明了辐射噪声对消声器声学性能的明显影响。在降低原消声器厚度情况下对消声器进行形貌优化,得到消声器辐射噪声更小的优化结果。This paper investigates the structural dynamics of a muffler through transfer function and modal analysis methods. The sound radiation of the muffler is computed by the finite element and boundary element coupled analysis,and compared with the sound level of exhaust noise,which illustrates that the radiation noise has an evident impact on the acoustic performance of the muffler. The shape of muffler is optimized by reducing its thickness,and consequently result shows that the optimized muffler has lower radiation sound level.

关 键 词：有限元 边界元 辐射噪声 厚度 形貌优化 

分 类 号：U464.134.4[机械工程—车辆工程]