摘要
副车架作为独立悬架总成中的重要组成部分,其结构尺寸的最优化设计是十分关键的问题。通过ADAMS/CAR建立悬架总成的刚柔耦合动力学模型,根据三种典型工况下的受力分析提取副车架各硬点位置所受力及力矩大小。对副车架进行静力分析,利用Opti Struct的优化功能,对副车架进行尺寸优化设计,得到副车架的最优结构尺寸。优化后的副车架质量减少11.04%,并通过静力学及模态分析验证了优化结果。最后,建立优化后的刚柔耦合模型,对比分析了副车架结构变化对悬架性能的影响,为副车架实际生产提供了理论参考。
As an important component of independent suspension,optimum design of the subframe in terms of structural dimensions is acrucial issue. In this paper,rigid-flexible coupling model of suspension assembly is established using ADAMS/CAR. The force and the moment of each hard point position of the subframe are extracted according to the force of three typical working cases. Static analysis and dimensional optimization on the subframe has been carried out by utilising the optimization function of Opti Struct. As results,the optimized subframe reduces by 11. 04% of weight. The optimization results are verified by static and modal analysis. Finally,a rigid-flexible coupling model of new rear-subframe has been developed and discussed in terms of the performance parameters of the suspension. The work introduced in this paper provides a theoretical guideline for designing the subframe for vehicles.
关键词
副车架
刚柔耦合
尺寸优化
subframe
rigid-flexible coupling
size optimization
