泡沫铝填充非等长双方管的轴向压溃特性研究

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摘要泡沫铝填充双管结构在轴向压缩下的初始峰值力突出，在作为吸能元件时未能有效地起到保护作用。在双管填充结构的基础上，提出了一种采用非等长双管填充结构降低初始峰值力的方法，建立了具有不同内管长度的泡沫铝填充双方管结构的有限元模型，研究了内管长度对吸能过程的影响。结果表明，与等长双管填充结构相比，非等长双管填充结构的初始压溃峰值可大幅度降低约37%，初始峰值力与平均力之比从1.9下降到1.4，且平台力不会受到明显影响。通过分析泡沫铝、内管和外管之间的相互作用，获得了双管填充结构峰值载荷与材料/结构参数之间的关系。内外管非等长设计可以提高泡沫铝填充双管结构冲击载荷的稳定性和可控性，可为压溃力稳定的吸能器设计提供指导。

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	汪高飞1
	张永亮1
	郑志军1
	叶坚2
	秦玉林2
	柯俊2
	虞吉林1

关键词 ：泡沫铝, 填充结构, 双管构型, 初始压溃峰值, 相互作用

Abstract：Foam-filled double tubes under axial compression have high values of initial buckling force and when used as energy-absorbing components they may not effectively play a protective role. A method was proposed to reduce the initial buckling force of the foam-filled double tubes by reducing the length of inside tube. Finite element analysis was performed on the mechanical behavior of the new structures with different lengths of inner tubes under quasi-static axial compression. The effect of the length of inner tube on the energy absorption process was analyzed. The results show that the initial buckling force of the new structure could be reduced by 37%, the ratio of the initial buckling force to the mean force is reduced from 1.8 to 1.4 and the plateau force is almost unchanged. The interaction among aluminum foam, inner tube and outer tube was analyzed, and the relationship between the peak initial buckling force and the material and structural properties of the foam-filled double tubes was obtained. The non-equal length design of the inner and outer tubes can improve the stability and controllability of the impact force of the foam-filled double tubes, and provide guidance for the design of energy absorbers with stable compressive load.

Key words： aluminum foam filling structure double tube initial peak load interaction

收稿日期: 2020-08-05 出版日期: 2021-12-28

引用本文:

汪高飞1，张永亮1，郑志军1，叶坚2，秦玉林2，柯俊2，虞吉林1. 泡沫铝填充非等长双方管的轴向压溃特性研究[J]. 振动与冲击, 2021, 40(24): 90-98.
WANG Gaofei1，ZHANG Yongliang1，ZHENG Zhijun1，YE Jian2，QIN Yulin2，KE Jun2，YU Jilin1. Axial compression characteristic of non-equal length double square tube structures filled with aluminum foam. JOURNAL OF VIBRATION AND SHOCK, 2021, 40(24): 90-98.

链接本文:

http://jvs.sjtu.edu.cn/CN/ 或 http://jvs.sjtu.edu.cn/CN/Y2021/V40/I24/90

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