某轻型卡车转向器支架断裂原因分析与结构优化

Fractured Reasons Analysis and Structure Optimization on the Light Truck Steering Bracket

汽车转向器支架是转向器与车架之间的重要连接件,为了保证支架的安全可靠性,在设计阶段必须保证支架有足够强度,同时应避免结构冗余,影响车辆轻量化要求。结合某轻型卡车市场出现方向机支架断裂问题,利用HyperWorks软件对断裂转向器支架进行有限元分析,并对改进结构实施拓扑优化,优化后支架与断裂支架比较,最大应力由189.4 MPa降低到142.4MPa,质量减轻38%。最终通过实验验证了优化支架的可靠性,说明基于CAE的结构分析和拓扑优化,能为产品故障分析提供手段,为产品设计和轻量化提供有效解决方案。

Automotive steering bracket is an important connection between the fi＇ame and steering box. In order to ensure safety and relia- bility of the bracket, in the design stage, it is necessary to ensure adequate strength, while redundant structure should be avoided which will impact vehicle lightweight requirements. Aiming at a light truck＇ s market issues, HyperWorks software was used to do finite element analysis for the fractured bracket, and the structure was improved by topology optimization. Compared with the fractured bracket, the optimized bracket had 25% of the nlaxinmm stress t^duction, 38% of weight reduction. The reliability of the optimized bracket was verified by experiment. It is indicated that the CAE-based structure analysis and topology optimization, can provide means for product failure analysis, find optimal solution for product design.