具有刚度梯度折纹管能量吸收
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TIAN XiaoGeng
( State Key Laboratory for Strength and Vibration of Mechanical Structuresꎬ Xi’ an Jiaotong Universityꎬ
Xi’ an 710049ꎬ China)
摘要 为了解决传统薄壁方管在遭受冲击时最大峰值力大且吸能效率低等问题ꎬ通过在方管表面引入折痕ꎬ提出了
number of standard segments Mꎬc / lꎬand b / t on the energy absorption performance of the pre ̄folded tubeꎬ the optimized structure
of the pre ̄folded tube to improve the energy absorption performance of the pre ̄folded tube is obtainedꎬ which provides a reference
for the application of the automobile energy absorption components.
Key words Pre ̄folded tubeꎻ Energy absorptionꎻ Stiff gradient
Corresponding author: TIAN XiaoGengꎬ E ̄mail: tiansu@ mail.xjtu.edu.cnꎬ Tel:+86 ̄29 ̄82665420
出行的同时ꎬ交通事故不可避免会发生ꎬ给人们生命和
财产造成巨大的损失ꎮ 通常ꎬ为了保护乘客的生命安
全ꎬ会在汽车端部安装专门的能量吸收装置ꎮ 薄壁结
构因其具有质量轻、吸能效果好等优点ꎬ已经被广泛的
应用于汽车结构中ꎬ其中最常见的是圆管和方管 [1 ̄2] ꎮ
但是方管和圆管受到冲击时吸收能量少、最大峰值力
( P max ) 较高ꎬ吸能效果不佳ꎮ
square tubes during impactꎬ the octagonal pre ̄folded tube was proposed by introducing creases on the surface of square tubes. The
finite element software ABAQUS / Explicit was used to simulate the deformation mode and energy absorption under quasi ̄static
纹管的标准段个数 M、c / l 和 b / t 等参数对吸能性能影响的研究ꎬ获得了提高折纹管吸能性能的优化折纹管结构ꎬ为汽车
吸能构件的应用提供了参考ꎮ
关键词 预折纹管 能量吸收 刚度梯度
中图分类号 O347
Abstract In order to solve the problems of high peak force and low energy absorption efficiency of traditional thin ̄walled
The project supported by the National Natural Science Foundation of China( No.11732007)
Manuscript received 20191223ꎬin revised form 20200109.
引言
随着科技和经济的发展ꎬ汽车极大的方便了人们
具有刚度梯度折纹管能量吸收 ∗
ENERGY ABSORPTION OF PRE ̄FOLDED TUBE
WITH STIFFNESS GRADIENT
门 恒 ∗∗ 陈伟东 田晓耕 ∗∗∗
( 西安交通大学 机械结构强度与振动国家重点实验室ꎬ 西安 710049)
MEN Heng
CHEN WeiDong
Copyright©博看网 . All Rights Reserved.
பைடு நூலகம்
Journal of Mechanical Strength
2021ꎬ 43(3) :651 ̄659
DOI: 10 16579 / j.issn.1001 9669 2021 03 021
compression. The results show thatꎬ compared with the square tubeꎬ the introduction of crease reduces the maximum peak force
P max ꎬ increases the mean crushing force P m ꎬ and forms the stiffness gradient crease tubeꎬ which produces a small crush force in
the early stage of compressionꎬ which is beneficial to protect the main structure. With the increase of compressionꎬ the reaction
force increasesꎬ and the energy absorption performance of the folded tube is improved Based on the study of the influence of the
等
[3]
降低 P max 的 常 见 做 法 是 引 入 几 何 缺 陷ꎬ Song Jie
一种八边形折纹管ꎮ 应用有限元软件 Abaqus / Explicit 模拟了其在准静态压缩下的变形模式和吸能情况ꎮ 结果表明ꎬ相
较于普通方管ꎬ折纹的引入降低了最大峰值力 P max ꎬ提高了平均压溃力 P m ꎬ且形成了刚度梯度折纹管ꎬ使得在压缩前期
产生较小的支反力ꎬ有利于保护主结构ꎮ 随着压缩量的增大ꎬ支反力随之增大ꎬ从而提高折纹管的吸能性能ꎮ 通过对折