Abstract

In recent years, thin-walled energy-absorbing structures have attracted more and more attention due to their excellent structural mechanical properties. In this article, one new kind of multi-cell bionic intersecting thin-walled tube inspired by the structure of the pine cone was designed. In order to fully study the crashworthiness of this new multi-cell tube under axial impact, the effectiveness of the simulation analysis is verified by the verification test of the circular thin-walled tube. Then, the crashworthiness of the circular tube and a series of multi-cell tubes were compared by means of simulation analysis. The simulation results show that the new multi-cell tube can effectively improve the efficiency of energy absorption, specific energy absorption, and crushing force efficiency under the premise of sacrificing part of the peak load. Finally, the response surface method was used to find the optimal design parameters. Response surface model (RSM) was used to represent specific energy absorption (SEA), peak force (PF), crushing force efficiency (CFE), and mass (M). Optimisation results show that the overall impact performance of the three-cell bionic tube under the axial impact load is better than that of the ordinary circular tube and several other multi-cell tubes. Therefore, the three-cell bionic tube can be used as an excellent absorption structure of collision energy under axial impact.

摘要

近年来，薄壁吸能结构因其优异的结构力学性能而受到越来越多的关注。在本文中，受松果结构的启发，设计了一种新型多细胞仿生相交薄壁管。为了充分研究这种新型多室管在轴向冲击下的耐撞性，通过对圆形薄壁管的验证试验，验证了仿真分析的有效性。然后通过仿真分析比较了圆形管和一系列多单元管的耐撞性。仿真结果表明，新型多胞管在牺牲部分峰值负荷的前提下，能有效提高吸能效率、比吸能效率和破碎力效率。最后采用响应面法寻找最优设计参数。响应面模型 (RSM) 用于表示比能量吸收 (SEA)、峰值力 (PF)、破碎力效率 (CFE) 和质量 (M)。优化结果表明，三细胞仿生管在轴向冲击载荷下的整体冲击性能优于普通圆管和其他几种多细胞管。因此，三胞仿生管可以作为轴向冲击下碰撞能量的优良吸收结构。优化结果表明，三细胞仿生管在轴向冲击载荷下的整体冲击性能优于普通圆管和其他几种多细胞管。因此，三胞仿生管可以作为轴向冲击下碰撞能量的优良吸收结构。优化结果表明，三细胞仿生管在轴向冲击载荷下的整体冲击性能优于普通圆管和其他几种多细胞管。因此，三胞仿生管可以作为轴向冲击下碰撞能量的优良吸收结构。