模态综合法在车身结构动力学计算中的应用  

Application of Component Mode Synthesis on Dynamic Analysis of Automotive Body Structure

作　　者：冯海星[1] 刘海立[1] 张松波 高云凯[1] 

机构地区：[1]同济大学汽车学院,上海201804 [2]重庆长安汽车股份有限公司汽车工程研究院,重庆401120

出　　处：《汽车工程》2012年第9期811-815,共5页Automotive Engineering

基　　金：上海汽车工业科技发展基金(1011)资助

摘　　要：采用模态综合法求解车身模态、车身结构在发动机激励下的响应和车身结构与驾驶室声腔耦合的声学响应。与传统的有限元分析的对比结果表明,使用模态综合法求解时,计算时间缩短18%～40%,而车身结构模态、频响和声固耦合响应的计算偏差分别在1%、5%和15%以内。Component mode synthesis （CMS） technique is adopted to find the modes of car body, the body response under engine excitation and the acoustic response with coupling between body structure and cab acoustic cavity. The results of comparison with conventional FEA show that with CMS technique, the computation time is re- duced by 18% -40% with the. deviations in mode, frequency response and acoustic-structure coupling response less than 1%, 5% and 15% respectively.

关 键 词：车身结构 模态综合 计算效率 声固耦合 NVH 

分 类 号：U463.82[机械工程—车辆工程]