轿车白车身的有限元模态与试验模态分析研究

Finite Model and Experiment Modal Analysis of Car Body-in-White

针对某轿车白车身进行有限元建模及理论模态分析,科学地建立了白车身模态试验系统,依据模态确认准则验证了该白车身试验模态特性,将理论分析与试验分析结果对比,检验了有限元分析模型的精度,为车身的动态和结构设计提供了参考依据。

In this paper, the finite element model of car body-in-white is established and the vibration modes of the car are theoretically analyzed. The car body-in-white experimental system was established scientifically and the experimental modal quality was proved by modal assurance criterion. By contrast between the result of model analysis and the experiment, the finite element analysis model＇s precision has been examined. The result＇ will provide the basis for the dynamic and structure design.