应用CAE技术进行汽车乘员室声学分析与优化  

Acoustic Analysis and Topology Optimization of Auto-body Using CAE Method

作　　者：梁新华[1] 朱平[1] 林忠钦[1] 

机构地区：[1]上海交通大学机械与动力学院,上海200030

出　　处：《机械设计与研究》2006年第3期64-66,共3页Machine Design And Research

摘　　要：近年来,由于具有节省成本和开发时间的优点,采用计算机仿真技术对结构进行振动和噪声分析已经越来越受到工业界的重视。应用有限元法和边界元法相结合的技术对汽车乘员室进行噪声分析可以大大减少计算时间,并能保证计算精度。具体地,计算声压响应时,首先应用有限元法进行车身结构的频率响应分析,然后将计算所得的结构壁板速度响应作为内部声腔的边界条件,采用边界元法计算乘员室内部的声响应。最后对声压峰值处的结构进行壁板贡献度分析,并对贡献度最大的板件进行阻尼处理,有效地降低乘员耳部的声压响应峰值。Recently, using numerial method to perform the vibration and acoustic analysis is getting more and more attention because of its merits of saving costs and time. In this study, the acoustic analysis of auto-body is performed. As to the acoustic analysis, in order to get the dynamic behavior of the auto-body structure, a frequency response function of the body structure is calculated by using FEM. And then, the pressure response of the interior acoustic domain is solved by boundary element method （BEM）. Finally, the panel contribution analysis for finding the location of the noisiest panel and the structural topology optimization are performed in modification.

关 键 词：声学响应分析 FEM BEM 

分 类 号：TP391.9[自动化与计算机技术—计算机应用技术]