高速列车前端多胞吸能结构的耐撞性优化

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振动与冲击 ›› 2017, Vol. 36 ›› Issue (12) : 31-36.

论文

高速列车前端多胞吸能结构的耐撞性优化

张秧聪1许平1彭勇1邓雯苑1,2车全伟1

作者信息 +

Crashworthiness Optimization of High-speed Train FrontalMulti-cell Energy-absorbing Structure

ZHANG Yang-cong1, XU Ping1,PENG Yong1 ,DENG Wen-yuan1,2，CHE Quan-wei1

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文章历史 +

摘要

为设计具有良好耐撞性能的高速列车前端多胞吸能结构，基于显式动力学有限元软件LS-DYNA，建立此吸能结构的有限元模型，并通过台车碰撞试验验证了有限元模型的准确性，结合验证的有限元模型与全因子试验设计，构造了吸能结构的比吸能SEA和撞击平台力关于设计参数单元胞边长和壁厚的Kriging代理模型，并进行了误差分析，采用多目标粒子群优化算法，对多胞吸能结构的截面尺寸和厚度进行了优化设计。结果表明：壁厚比单元胞边长对多胞吸能结构耐撞性影响更显著，通过合理匹配壁厚和边长，能有效提高撞击平台力和比吸能。

Abstract

To designhigh-speed train frontalmulti-cell energy-absorbing structure with excellent crashworthiness,the finite element model (FEM) of energy-absorbing structure was established using finite element software LS-DYNA based on explicit dynamic, and FEM was effectively verified using trolley collision test.Combined with the validated FEM and full factorial experiment design, the Kriging surrogate models of specific energy absorption (SEA)and mean crushing forcewith respect to design parameters were respectively constructed, and error analysis was given. The section size and thickness of energy-absorbing structurewere optimized by using multi-objective particle swarm optimization algorithm.The result shows that wall thickness than cell-wall length has more obvious impact on crashworthiness of multi-cell energy-absorbing structure, the mean crushing force and SEA can be effectively improved by reasonable matching wall thickness and length.

导出引用

张秧聪1许平1彭勇1邓雯苑1,2车全伟1. 高速列车前端多胞吸能结构的耐撞性优化[J]. 振动与冲击, 2017, 36(12): 31-36

ZHANG Yang-cong1, XU Ping1,PENG Yong1,DENG Wen-yuan1,2，CHE Quan-wei1. Crashworthiness Optimization of High-speed Train FrontalMulti-cell Energy-absorbing Structure[J]. Journal of Vibration and Shock, 2017, 36(12): 31-36

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