车门开闭耐久仿真分析研究及结构优化

Car Towing Hook Strength Analysis and Design Based on Topology Optimization

车门开闭耐久性能在整车设计中至关重要,直接影响汽车的品质和品牌形象。文章基于有限元理论和疲劳耐久理论在HyperMesh软件中建立某车型车门开闭耐久分析有限元模型,解决了玻璃升降器区域钣金开裂问题。首先,利用Abaqus/Explicit求解器进行冲击强度的瞬态动力学分析,获得各单元时域下的冲击应力;然后在Ncode软件中基于各单元时域下的冲击应力及结合冲击时间历程,预测车门结构设计的危险区域。在此基础上,提出优化方案并进行疲劳分析,经试验验证了优化方案的有效性。

Door opening and closing durability is very important in vehicle design,which directly affects the quality and brand image of the car.In this paper,based on the finite element theory and fatigue durability theory,the finite element model of door opening and closing durability analysis is established to solve crack problem of the window regulator area by HyperMesh.Firstly,the transient dynamic analysis of impact strength is carried out by Abaqus/Explicit solver to obtain the impact stress of each element in time domain;then,based on the impact stress of each element in time domain and the impact time history,the dangerous area of door structure design is predicted in ncode software.On this basis,the optimization scheme is proposed and fatigue analysis is carried out.The effectiveness of the optimization scheme is verified by the test.