汽车车门内锁止有限元分析及结构优化

FEA and Optimization for Vehicle Inner-door Latch

利用Unigraphics NX软件平台,对内锁止进行有限元仿真,分析其工作时受到的应力和位移。依据分析结果发现最大应力出现在凸耳根部,针对结构特点提出增大凸耳根部宽度并增添加强筋以求减小最大应力。实施结构优化后再次进行有限元仿真,对比前后两次有限元分析结果可知:该结构优化方案可有效减小内锁止工作时最大应力和位移,提高其工作可靠性和延长使用寿命,实现增强汽车安全性能的目的。

With the help of Unigraphics NX software platform,the finite element simulation and analysis were carried on the inner-door latch model to analyze its stress and displacement when it worked. The maximum stress was found occurring at the convex lug root from the results of the analysis. To reduce the maximum stress,a proposal was submitted in which the width of the convex lug root was increased and stiffeners was added. After optimization,the FEA was conducted again and compared with the former results. It is shown that the structure optimization scheme can effectively reduce the maximum working stress and displacement of the inner-door latch,as well as the work reliability and life are improved with vehicle security enhanced.