轿车白车身模态试验与有限元模态分析的对比

Comparison between Modal Analysis and Experimental Modal Analysis of Car's Body-in-White

以某轿车白车身为研究对象,利用模态试验分析方法研究该白车身的振动,用随机信号对白车身进行激励,测得固有频率、阻尼、振型等模态参数.并与该白车身的有限元模态分析结果进行对比,用分析结果的差别评价该白车身动态特性.

Taking car＇ s body-in-white as subject, this paper analyzes the vibration of the body-in-white based on the experimental modal analysis method. The modal parameters such as the mode frequency, damp and shape of the frame are identified by using random signal. The results of the finite element modal analysis are compared with that of test, then comments are offered on the dynamic characteristics of the car＇ s body-in-white.