摘要
以某商用车白车身为研究对象,对其进行了自由模态仿真分析,并使用LMS Test.lab对白车身进行自由模态试验。通过仿真分析和试验得到了该白车身的模态参数,发现仿真和试验的固有频率相差较大。随后基于自主设计的气囊工装再次对白车身进行模态试验,试验结果与仿真结果偏差较小。说明模态试验边界对结果影响很大,所设计的气囊工装可有效提升模态试验的准确度,也证明了该建模方法的准确性;模型精度可满足工程实际需求,为白车身的结构设计和动态特性优化提供参考。
Taking the body-in-white(BIW)of a commercial vehicle as the research object, the free mode simulation analysis was carried out.LMS Test.lab was used to conduct free mode test on BIW.The modal parameters of BIW were obtained through simulation analysis and test, and it was found that the natural frequencies between simulation and test were quite different.Based on the self-designed airbag tooling, the modal test of BIW was conducted again, and the deviation between the test results and the simulation results was very small.It shows that the boundary of the modal test has a great influence on the results.The designed airbag tooling can effectively improve the accuracy of the modal test, and also proves the accuracy of the modeling method.The model accuracy can meet the actual needs of the project, which provide reference for the structural design and dynamic characteristics optimization of the BIW.
作者
秦严彬
吴思远
洪森
QIN Yanbin;WU Siyuan;HONG Sen(Xuzhou XCMG Automobile Manufacturing Co.,Ltd.,Xuzhou Jiangsu 221004,China;Sate Key Laboratory of Intelligent Manufacturing of Advanced Construction Machinery,Xuzhou Jiangsu 221004,China)
出处
《汽车零部件》
2023年第2期55-59,共5页
Automobile Parts
关键词
白车身
有限元
模态试验
固有频率
body-in-white(BIW)
FEA
modal experiment
natural frequency
