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汽车安全与节能学报

汽车安全与节能学报 ›› 2013, Vol. 4 ›› Issue (2): 142-151.DOI: 10.3969/j.issn.1674-8484.2013.02.006

• 汽车安全 • 上一篇    下一篇

有利于行人保护的非对称式发动机罩盖的设计

李景涛1，刘卫国2，张金换*1，赵福全2   

  1. 有利于行人保护的非对称式发动机罩盖的设计
  • 收稿日期:2013-03-01 出版日期:2013-06-25 发布日期:2013-06-27
  • 作者简介:李景涛（1987—），男（瑶），广西，硕士研究生。E-mail ：asswar133@163.com
  • 基金资助:

    浙江省汽车安全技术研究重点实验室建设项目（2009E10013）

Design of asymmetric vehicle hood inner for pedestrian head protection

LI Jingtao1, LIU Weiguo2, ZHANG Jinhuan1, ZHAO Fuquan2   

  1. 1. 清华大学 汽车安全与节能国家重点实验室，北京 100084 ；2. 浙江省汽车安全技术研究重点实验室，杭州 311228
  • Received:2013-03-01 Online:2013-06-25 Published:2013-06-27

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摘要： 轿车—行人碰撞中，发动机罩盖是造成行人头部伤害的主要来源。该文进行了6 组轿车—儿童行人头型冲击器冲击试验，建立了相应的冲击试验有限元模型（FEM），并完成了模型标定。通过FEM 仿真，分析了5 种不同内板肋板结构的发动机内罩板吸能特性；并根据某款发动机舱布置，设计了一种非对称式发动机罩盖内罩板；进行了有限元模型验证。结果显示：优化设计后，罩盖的多个冲击点的头部伤害标准HIC 值降至1 300 以下，部分冲击点降至1 000 以下。因而，明显提升了该种发动机罩盖对行人头部保护。

关键词: 汽车安全, 轿车&mdash, 行人碰撞, 行人头部保护, 发动机罩盖内板, 非对称式设计

Abstract: Engine hoods are a main resource of pedestrian head injuries in vehicle-pedestrian impact. Six tests were made using child pedestrian head impactors, with the corresponding finite element model built and calibrated to improve pedestrian head protection. The energy absorption performances of five types of
hood inner structures were analyzed using a finite element model (FEM), with an asymmetric vehicle hood inner then designed according to the engine compartment layout of a kind of vehicle. The results show that the head injury criterion (HIC) at several areas of the hood inner is reduced to less than 1300, a few of which to less than 1000. Therefore, the pedestrian head protection is significantly improved using the asymmetric vehicle hood inner.

Key words: crash safety, vehicle-pedestrian impact, pedestrian head protection, vehicle hood inner, asymmetric design

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