运动轿车白车身试验模态分析

Experimental Modal Analysis of a Sports Car Body in White

首先设计了白车身试验悬挂系统,然后运用试验模态分析方法,测得了结构的频响函数,通过对频响函数的分析,确定了车身的模态特征。试验结果表明,测试系统组建满足精度要求,参数辨识结果有效可靠;文章还对出现共振和局部振动的结构进行了分析,为设计人员改进结构设计提供了依据。

First, the paper designed the testing hang system of the sports car body in white. Then, it got the frequency -response function of the structure,using experimental modal analysis method. Finally,it got the modal characteristic of the body by the analysis of the response function. Testing results show that the system constructed can meet the precision requirements ,and that modal parameters are reliable. The resonant and the local vibration of the body are also analyzed, and the analysis results provide the basis of improving the design for the designers.