汽车车身结构刚度与模态分析及结构改进方法研究  

Auto body structural stiffness and modal analysis method and structure improvement research

作　　者：林辉[1] 陈吉清[1] 谢然[1] 

机构地区：[1]华南理工大学机械与汽车工程学院,广州510640

出　　处：《现代制造工程》2011年第6期58-63,共6页Modern Manufacturing Engineering

摘　　要：基于有限元分析方法,对车身结构的弯曲刚度、扭转刚度和低阶模态进行研究;建立某轿车的有限元模型,根据其刚度、模态分析结果和该车身的受力特点,通过调整关键结构件的厚度参数以及修改主要接头的连接关系和截面形状,成功地使车身刚度和模态性能达到设计要求。The structural bending stiffness, torsion stiffness and low-order modal analysis methods and principles of auto body are studied by means of the Finite Element Method （FEM）. According to the mechanical characteristics of typical car body, the different stiffness and modal analysis methods of body structure are researched in the various stages of the design, as well as structure improving methods. Constructing the finite element model of a car, then the improvement measures are used according to the FEM analysis result,succeeded in its stiffness and modal performance to the design requirements.

关 键 词：车身 弯曲刚度 扭转刚度 模态有限元 

分 类 号：U270.2[机械工程—车辆工程]