微型客车车身结构模态分析研究

采用模态分析方法，针对由于振动带来的车身结构变形进行了分析，获得了车身在原始设计状态下的振动频率和结构变形，预测出了车身在不同频率下的振动模态，通过增加局部结构件的方式在加强车身的刚度的同时提高了车身的低阶振动频率，进而降低车身的结构变形。通过模态分析和实验结合的方式获得了满足车身刚度设计要求的车身结构。路试证明，模态分析是一种有效的预测方法，增加的局部结构件能够有效地提高车身的刚度。

The Research on Modal Analyse of Mini-car Body Structure

Abstract By the way of modal analyses,the deformation about the structure of mini-car body caused by vibrate was analyzed.Frequency of vibration and structure deformation of white car body in the original design state were achieved.At the same time,the modals of vibration in different frequency were predicted.Local strengthen parts were designed to increase the stiffness of whole white car body.The low level vibration frequency was increased simultaneously.With the design changing,the deformation of structu...