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汽车安全与节能学报

JASE ›› 2017, Vol. 08 ›› Issue (03): 252-260.DOI: 10.3969/j.issn.1674-8484.2017.03.005

• 汽车安全 • 上一篇    下一篇

基于多工况的乘用车前防撞梁总成轻量化设计

张君媛1,2，刘 茜1，张 乐1   

  1. 1. 吉林大学 汽车仿真与控制国家重点实验室，长春130022，中国；
    2. 清华大学 汽车安全与节能国家重点实验室，北京100084，中国
  • 收稿日期:2017-04-07 出版日期:2017-09-28 发布日期:2017-10-03
  • 作者简介:第一作者 / First author ： 张君媛(1965 —)，女( 汉)，吉林，教授。E-mail : junyuan@jlu.edu.cn。 第二作者 / Second author ： 刘茜(1993—)，女( 汉)，吉林，硕士研究生。E-mail : 15144160966@163.com。
  • 基金资助:

    汽车安全与节能国家重点实验室开放基金项目(KF16152) ；吉林省科技发展计划项目(20160101269JC)。

Light-mass design of bumper beam system based on multiple modes

ZHANG Junyuan1,2, LIU Qian1, ZHANG Le1   

  1. 1. National Key Laboratory for Automotive Simulation and Control, Jilin University, Changchun 130022, China;
    2. State Key Laboratory of Automotive Safety And Energy, Tsinghua University , Beijing 100084, China
  • Received:2017-04-07 Online:2017-09-28 Published:2017-10-03

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摘要：

对影响整车正面碰撞性能的重要部件前防撞梁总成中的前防撞横梁和吸能盒，进行轻量化设计。根据前防撞梁总成在整车碰撞中的变形过程、吸能特点以及各部件之间的截面力传递关系，将防撞梁总成从整车碰撞工况下解耦，建立了防撞梁总成独立评价条件；并基于独立评价条件，通过改变结构截面形状与材料，对前防撞梁总成进行轻量化设计，将轻量化方案与整车集成通过Ls-Dyna 进行碰撞仿真与性能对比。结果表明：该轻量化方案使碰撞波形、侵入量与平均结构力得到优化，轻量化效果达到30%；因而，该前防撞梁总成轻量化设计方案是可行性的。

关键词: 汽车, 被动安全, 前防撞横梁, 轻量化设计, 吸能盒, 独立评价

Abstract:

The light-mass design was performed for front bumper and crash box in the front bumper assembly, which are the important components that influence automotive performance during front impact. The front bumper assembly was decoupled under the automotive collision condition according to the deformation process, the energy absorption characteristics and the transmission relationship of section force between different components of the front bumper assembly. The independent evaluation mode of the front bumper assembly was established. The light-mass design was performed by changing cross-section shapes and materials of structures  based on the independent evaluation mode. The light-mass solution was integrated with automotive, simulated by Ls-Dyna software and compared the performance. The results show that the scheme achieves a 30% lightmass effect with optimizing the collision waveform, the intrusion volume and the average structural force. Therefore, the light-mass design scheme of the front bumper assembly based on the independent evaluation mode is feasible.

Key words: automobile, passive safety, front bumper beam system, light-mass design, crash box, independent evaluation