车身轻量化中梁截面优化的研究与实现

摘要

为在车身概念设计阶段优化薄壁梁的截面,提出了截面几何属性算法和截面形状比例向量控制法；在自主开发的车身概念设计系统VCD_ICAE中,开发了截面辅助设计模块和截面优化模块；在此基础上,运用PSO优化算法,进行了多约束条件下车身梁截面厚度和形状的优化；实现了车身的轻量化.%For optimizing the sections of thin-walled beams in vehicle-body concept design phase, algorithms for determining section geometric properties and the method to control section shape by scale vector are proposed. The section assist-design module and section optimization module are developed and incorporated into the independently developed vehicle-body concept design system VCDJCAE. On these bases and adopting PSO optimization algorithm, an optimization of the thickness and shape of beam sections in multi-constraints condition is conducted , realizing the lightweighting of vehicle-body.