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

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Journal of Vibration and Shock ›› 2017, Vol. 36 ›› Issue (12) : 31-36.

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

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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.

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Solid mechanics / Multi-cellstructure / Numerical simulation / Impact experiments / Multi-objective optimization

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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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