基于磁流变缓冲吸能装置的汽车碰撞仿真分析

doi:10.3969/j.issn.1674-8484.2020.04.008

汽车安全与节能学报 ›› 2020, Vol. 11 ›› Issue (4): 487-492.DOI: 10.3969/j.issn.1674-8484.2020.04.008

基于磁流变缓冲吸能装置的汽车碰撞仿真分析

屈贤¹(), 林繁国², 张金龙³

1.重庆工程职业技术学院智能制造与交通学院,重庆 402260,中国
2.河北艾福亿维动力总成有限公司,河北 050000,中国
3.机械传动国家重点实验室,重庆大学汽车工程学院, 重庆 402260,中国

收稿日期:2020-08-24 出版日期:2020-12-30 发布日期:2021-01-04
作者简介:屈贤(1988—), 女（汉）,山东,讲师。E-mail:516685355@qq.com。
基金资助:
重庆市教育委员会科学技术研究项目(KJQN201803408);重庆市教委科学技术研究项目(KJ1603207);重庆工程职业技术学院院级科研项目(KJA201903);重庆工程职业技术学院“十大育人”科研育人项目(SDB202013)

Simulation analysis of vehicle collision based on magnetorheological buffer energy absorption device

QU Xian¹(), LIN Fanguo², ZHANG Jinlong³

1. Chongqing Vocational Institute of Engineering, College of Intelligent Manufacturing and Transportation, Chongqing 402260, China
2. Hebei Aifu Yiwei Powertrain Co. LTD, Hebei 050000, China
3. The State Key Laboratory of Mechanical Transmission, Chongqing University , School of Automotive Engineering, Chongqing 400044, China

Received:2020-08-24 Online:2020-12-30 Published:2021-01-04

摘要/Abstract

摘要：

为解决汽车保险杠吸能效率低、自适应差等问题,针对磁流变液响应快、易于控制等特点,提出了一种磁流变(MR)缓冲器结构。考虑碰撞过程中磁流变缓冲器内部压差影响,构建了磁流变缓冲器动力学模型;基于该动力学模型,建立了含磁流变缓冲装置的整车有限元模型,运用LS-DYNA进行碰撞吸能仿真试验。结果显示：相对传统吸能式保险杠,装有磁流变缓冲吸能装置的整车变形量减少36%;碰撞力峰值左右侧B柱加速度峰值明显减小;前围板最大侵入值减少47.3 mm。这表明磁流变缓冲装置可有效降低汽车碰撞对人员的伤害,提高汽车被动安全性。

关键词: 被动安全, 汽车碰撞, 磁流变(MR)液, 磁流变缓冲装置

Abstract:

A magnetorheological (MR) absorber was proposed based on the MR fluid, which has advantages of fast response and can be easily controlled to address some problems existing in bumpers, such as low energy absorption efficiency and poor adaptive performance. Considering the influence of the pressure difference inside the MR absorber during the collision, a dynamical model was built, followed by the establishment of the whole vehicle finite element model containing the MR absorber. A crash simulation experiment was carried out adopting LS-DYNA. The results show that the deformation of vehicles with the MR absorber can be reduced by 36% compared with that of conventional bumpers. Meanwhile, the peak acceleration of both sides of the B column as well as the peak impact force present a significantly decreasing tendency. The maximum intrusion of the dash board decreases by 47.3 mm. As a whole, the MR absorber is proved to be effective in reducing damage to members during the crash, thus further improving the passive safety of automobiles.

Key words: passive safety, vehicle crash, magnetorheological (MR) fluid, MR absorber

中图分类号:

TH122

屈贤, 林繁国, 张金龙. 基于磁流变缓冲吸能装置的汽车碰撞仿真分析[J]. 汽车安全与节能学报, 2020, 11(4): 487-492.

QU Xian, LIN Fanguo, ZHANG Jinlong. Simulation analysis of vehicle collision based on magnetorheological buffer energy absorption device[J]. Journal of Automotive Safety and Energy, 2020, 11(4): 487-492.

图/表 10

图1 保险杠结构图

图2 磁流变缓冲器

图3 磁流变缓冲器工作缸内部结构示意图

图4 整车碰撞有限元模型

图5 阻尼单元

图6 整车变形云图

图7 碰撞力曲线

图8 B柱加速度曲线

图9 前围板侵入位移云图

图10 前围板关键点位移曲线

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基于磁流变缓冲吸能装置的汽车碰撞仿真分析

Simulation analysis of vehicle collision based on magnetorheological buffer energy absorption device

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