车架结构二次拓扑优化设计与性能分析

针对重型车底盘车架的设计问题,提出一种基于多工况和二次局部优化的整体拓扑优化方法.根据商用车底盘实际尺寸,建立其结构拓扑优化模型.基于7种典型行驶工况得到初始拓扑结构,再根据不同工况对其局部二次拓扑优化得到最终车架优化结构,最后对其进行有限元仿真对比分析.结果表明:新车架结构质量减轻约30 kg,其刚度、强度及模态性能与原车架相比均有一定程度的改善,验证了所提出的二次拓扑优化方法的有效性.

Quatric-Topology-Optimization Design and Performance Analysis of Vehicle Chassis Structures

To solve the design problem of heavy commercial vehicle chassis， a global topology optimization method based on multi-load conditions and quatric local-optimization was proposed. A structural topology model was constructed based on the real sizes of commerical vehicle chassis. A preliminary topology structure was obtained based on seven typical loading conditions of the vehicle， and the final chassis optimization structure was obtained with the quatric-topology-optimization method based on different loading conditions. Finally， the finite element validation was given. The results showed that the new chassis mass reduced by nearly 30kg， and its stiffness， intensity and modal quality improved to a certain extent compared to the current one， and the effectiveness of the proposed quatric-topology-optimization method was verified.