轿车白车身模态分析研究

以某轿车白车身为研究对象，在Hypermesh中建立其有限元模型，再导人到ANSYS中对该有限元模型进行模态分析，从而求得白车身的固有振动特性，在进行有限元分析的同时对样车白车身进行模态试验分析，用试验结果验证有限元模型，结果表明，该车自车身的刚度较大，为后续的优化设计提供了一定的空间。

Model Analysis of an Body-in-white

In this paper,the finite element models of some car's body-in-white are established by using Hypermesh.The model analysis was executed base on the element model in Ansys.Through the model analysis the dynamic parameters of the body-in-white are obtained.At the same time,the modal test of a real car body is implemented.The reliability of the finite element model was validated base on the modal test.The results show that the stiffness of the body-in-white is great enough.