基于三维逆向建模的轿车前副车架有限元与实验模态分析  

Finite Element and Test Modal Analysis of Car Sub-frame Based on 3D Reverse Modeling

作　　者：孙传阳[1] 李剑敏[1] 杨章程[1] 陈道攀[1] 

机构地区：[1]浙江理工大学机械与自动控制学院浙江省可靠性重点实验室,杭州310018

出　　处：《机械工程师》2012年第11期54-57,共4页Mechanical Engineer

摘　　要：以某大众轿车副车架为对象,通过逆向工程反求得到三维模型,进行了模态试验和有限元分析。分析结果表明:对于复杂机械构件通过三维逆向反求能够得到较好的工程模型;文中研究的大众副车架固有频率较高,能够有效地避免路面激励通过悬架传入形成共振,具有较好的动力学特性;分析指出了副车架局部刚度较弱的部位,在设计中需引起关注。Taking the Volkswagen car sub-frame as object, the 3D model is obtained through reverse engineering, then a modal test and finite element analysis are carried out. The analysis results show that： better engineering model of the complex mechanical components can be realized through three-dimensional reverse engineering. The Volkswagen cal sub-frame has high natural frequency which can effectively avoid the road excitation through the suspension afferents form resonance, and has better dynamic characteristics. The analysis pointed out the weak area of the sub-frame＇s local stiffness, that sbould be paid attention in the design.

关 键 词：副车架 逆向工程 模态实验 固有频率 

分 类 号：TP391.41[自动化与计算机技术—计算机应用技术]