基于等效静载荷法的挤压铝门槛梁非线性结构优化

Nonlinear Optimization Design of Extruded Aluminum Sill Based on ESL Method

针对侧面柱碰撞工况下的挤压铝门槛梁截面正向设计问题,分析了基于等效静载荷(ESL)原理的非线性优化技术和传统优化技术的优缺点。研究显示:概念设计阶段基于等效静载荷法的非线性拓扑优化技术相比传统的线性拓扑优化技术,能得到更加贴近碰撞安全结构变形策略要求的拓扑路径;详细设计阶段,基于等效静载荷法的非线性料厚优化技术,在优化效率和优化方案性能方面都优于传统的近似模型数值优化技术。

For the forward design of extruded aluminum door sill section in side pole crash condition,this paper analyzed the pros and cons of the Equivalent Static Load(ESL) based nonlinear optimization and traditional optimization technology.The research indicate that the ESL based nonlinear topology optimization design can obtain a topology path closer to the strategic requirement of crash safety structural deformation in the concept design phase than the traditional linear topology optimization,whereas in the detailed design stage,the ESL based thickness optimization method is better than the traditional approximate model value optimization technology in optimization efficiency and optimization scheme performance.