新型仿竹六边形梯度层级多胞管耐撞性对比分析

doi:10.13229/j.cnki.jdxbgxb.20221099

摘要/Abstract

摘要：

设计并提出了一种新型的仿竹六边形梯度层级多胞管。首先，采用超折叠单元方法推导了六边形单梯度层级多胞管的平均冲击力的理论解，开展了方管的实验研究，利用理论解及实验结果对有限元数值模型的精确性进行了验证。其次，利用验证后的数值模型分析了不同壁厚的仿竹六边形梯度层级多胞管的耐撞性能。最后，系统地研究了仿竹六边形梯度层级多胞管相比常规方管、六边形管、六边形单梯度层级多胞管在相同质量、相同初始峰值力和相同能量吸收条件下的耐撞性能。研究结果表明：提出的仿竹六边形梯度层级多胞管能有效降低结构的初始峰值力和提高结构的冲击力效率，在相同质量、相同初始峰值力和相同能量吸收条件下，仿竹六边形梯度层级多胞管的综合耐撞性能都要优于常规方管、六边形管和六边形单梯度层级多胞管。研究结果能为新型梯度层级多胞管的结构创新设计提供参考。

关键词: 车辆工程, 耐撞性, 仿竹结构, 梯度层级多胞管, 能量吸收

Abstract:

A novel bamboo-like hexagonal gradient hierarchical multicellular tube （BHGHMT） was designed. A theoretical solution of the mean crashing force for hexagonal single-gradient hierarchical multicellular tube （HSGHMT） is derived by using the super-folded element method， and the experimental study of the square tube is carried out. The accuracy of the finite element numerical model is verified by using the theoretical solution and the experimental results. The crashworthiness performance of BHGHMTs with different wall thicknesses was analyzed using the validated numerical model. Finally， the crashworthiness performance of the BHGHMT and the conventional square tube （ST）， hexagonal tube （HT）， and HSGHMT under the same mass， the same initial peak force and the same energy absorption were compared. The research results show that the proposed BHGHMT can effectively reduce the initial peak force and improve the crushing force efficiency. The crashworthiness performance of the BHGHMT is better than that of the conventional ST， HT and HSGHMT under the same mass， the same initial peak force and the same energy absorption. The research results can provide a reference for the innovative design of gradient hierarchical multicellular tubes.

Key words: vehicle engineering, crashworthiness, bamboo-like structure, gradient hierarchical multicellular tube, energy absorption

中图分类号:

U463.8

邓小林,杨馥模,覃善甘. 新型仿竹六边形梯度层级多胞管耐撞性对比分析[J]. 吉林大学学报(工学版), 2024, 54(2): 333-345.

Xiao-lin DENG,Fu-mo YANG,Shan-gan QIN. Comparative analysis on crashworthiness of a novel bamboo⁃like hexagonal gradient hierarchical multicellular tube[J]. Journal of Jilin University(Engineering and Technology Edition), 2024, 54(2): 333-345.

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名称	质量/kg	壁厚/mm	IPCF/kN	EA/J	SEA/（kJ·kg^-1）	CFE/%
ST	0.117	1.5000	72.91	2591.37	22.15	34.85
HT	0.117	1.0000	68.31	1751.47	14.97	25.14
HSGHMT	0.117	0.2866	68.83	3597.52	30.75	51.24
BHGHMT	0.117	0.3439	6.33	3186.61	27.24	493.52

名称	质量/kg	壁厚/mm	IPCF/kN	EA/J	SEA/（kJ·kg^-1）	CFE/%
ST	0.365	4.70	294.49	17334.15	47.48	57.71
HT	0.408	3.50	295.71	15365.00	37.66	50.94
HSGHMT	0.408	1.00	293.85	22210.25	54.44	74.10
BHGHMT	1.160	3.40	295.69	84591.81	72.92	280.47

名称	质量/ kg	壁厚/ mm	IPCF/ kN	EA/ J	SEA/ （kJ·kg^-1）	CFE/ %
ST	0.1170	1.5000	72.91	2591.37	22.15	34.85
HT	0.1420	1.2100	84.42	2603.50	18.33	30.24
HSGHMT	0.0943	0.2310	40.32	2584.54	27.41	62.84
BHGHMT	0.1010	0.2982	5.34	2594.10	25.68	476.26