基于混合元胞自动机的铝合金保险杠横梁设计

Design of an Aluminum Bumper Beam Based on Hybrid Cellular Automata

摘要:

为提高保险杠横梁的耐撞性并考虑轻量化的要求，提出铝合金横梁结构的设计方法.建立耐撞性有限元仿真模型，基于混合元胞自动机方法进行耐撞性拓扑优化，根据材料分布得到H型梁的结构；采用Kriging近似模型技术，进一步优化拓扑优化后的截面尺寸.结果表明，所提出的结构设计方法可以得到合理的截面形状和尺寸，提高了保险杠横梁耐撞性且实现了轻量化设计.

Abstract:

In order to improve the crashworthiness and simultaneously achieve the lightweight goal, a design method was proposed for an aluminum bumper. A crashworthiness simulation model was established first and topology optimization was conducted based on hybrid cellular automata (HCA). The material distribution from topology optimization was used to generate H shaped cross section. Base on the Kriging modeling technique, size optimization was executed to acquire the optimal sectional dimension. The final result demonstrates that the proposed method is able to provide a reasonable cross sectional shape and size of the bumper, and to improve the crashworthiness of the bumper beam and to achieve a lightweight design.