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汽车安全与节能学报

汽车安全与节能学报 ›› 2015, Vol. 6 ›› Issue (02): 134-138.DOI: 10.3969/j.issn.1674-8484.2015.02.004

• 汽车安全 • 上一篇    下一篇

轿车热冲压保险杠的柱类碰撞耐撞性

林建平1，舒常乐1，金建伟2，王灿1，王晓娜2，姚再起2   

  1. 1. 同济大学，机械与能源工程学院，上海201804，中国；
    2. 吉利汽车研究院，杭州311228，中国
  • 收稿日期:2014-07-12 出版日期:2015-06-25 发布日期:2015-07-08
  • 作者简介:第一作者 / First author ： 林建平（1958 －），男（汉），上海，教授。E-mail: jplin58@tongji.edu.cn 第二作者 / Second author ： 舒常乐，硕士研究生。E-mail: shuchangle@126.com 04/13 134 — 138
  • 基金资助:

    国家“十二五”科技支撑计划项目子项（2011BAG03B02）；国家自然科学基金（51375346）

Pole impact crashworthiness of hot stamping front bumper of a car

1. Tongji University, School of Mechanical Engineering, Shanghai 201804, China;#br# 2. Geely Automobile Research Institute, Hangzhou 311228, China   

  1. 1. Tongji University, School of Mechanical Engineering, Shanghai 201804, China;
    2. Geely Automobile Research Institute, Hangzhou 311228, China
  • Received:2014-07-12 Online:2015-06-25 Published:2015-07-08

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摘要：

研究了汽车前保险杠与柱类物( 如电线杆或大树的垂直硬物) 耐碰撞性能。为降低保险杠的
质量，某轿车采用了超高强度热冲压含硼钢。针对该类保险杠进行了落锤试验。用有限元模型进行了
柱碰性能模拟，并分析了不同板厚的前保险杠耐撞性。选取了前保险杠的变形、受力及吸能3 个参
量作为柱碰过程的评判指标。结果表明：柱类碰撞时，对比原冷冲压保险杠，热冲保险杠的最大内
侵量减小40 mm，最大承载力提高7 kN，最终吸能量提高0.1 kJ。因而，热冲压保险杠具有更加优异
的柱碰性能。

关键词: 汽车安全, 柱类碰撞, 耐撞性, 热冲压, 保险杠

Abstract:

The impact crashworthiness between front-bumper and pillars (such as telegraph poles or trees)
was investigated. Some drop hammer impact tests were done for a car with its front-bumper being built from
ultra-high-strength hot-stamping boron-steel to reduce the bumper mass. The impact crashworthiness were
simulated and analyzed for the bumper with different thickness by a special finite element model with the
deformations, the stresses, and the energy absorption conditions of a front-bumper being taken as evaluation
indexes. The results show that the front-bumper using ultra-high-strength hot-stamping boron-steel reduces 40
mm within the biggest deformation, increases 7 kN within the biggest stress, and increases 0.1 kJ within the
energy absorptions compared with the original bumper from cold-stamping steel. Therefore, the hot-stamping
front-bumper has more excellent pole impact crashworthiness.

Key words: automotive safety, pole impact, crashworthiness, hot stamping, front bumper