轨道车辆泡沫铝填充吸能元件的优化设计

Optimum Design for Energy Absorption Device of Railway Vehicle with Aluminium Foam Filler

通过仿真研究了填充泡沫铝对吸能元件性能的影响,然后针对轨道车辆吸能装置中填充泡沫铝圆管元件参数进行优化研究。研究以质量最小为优化目标,以薄壁厚度、圆管直径以及泡沫铝密度为优化设计参数,以刚度为约束,运用序列二次迭代(SQP)法进行优化。最后,运用非线性有限元分析软件MSC.DYTRAN进行碰撞分析并验证了优化结果。结果表明:泡沫铝填充材料对元件的比吸能以及其他耐撞击性能的改善起到较为重要的作用;针对不同的吸能要求,泡沫铝密度需合理选取;填充泡沫铝的薄壁圆管壁厚度不宜取太大;泡沫铝材料的密度的选取应随压溃力的提高而适当增大。

By using a simulation method,this article investigates the infection of the energy Absorption component with aluminum foam,and according to the parameters of energy Absorption component,attempts to optimize the rail vehicle energy Absorption equipment. Aiming at achieving the goal of the least weight ,the thin-walled thickness,the pipe diameter and the aluminum foam density are taken as an optimum parameters,the stiffness as the constraint,and the sequential quadratic programming(SQP)as the optimum method. ...