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汽车安全与节能学报

汽车安全与节能学报 ›› 2014, Vol. 5 ›› Issue (04): 367-370.DOI: 10.3969/j.issn.1674-8484.2014.04.009

• 汽车安全 • 上一篇    下一篇

正面偏置碰撞中降低假人膝盖滑动位移的结构优化

杨笠，顾玉龙   

  1. 上海海马汽车研发有限公司，上海 201201，中国
  • 收稿日期:2014-05-19 出版日期:2014-12-25 发布日期:2014-12-29
  • 作者简介:杨笠（1980 －），男（汉），上海，工程师。E-mail: ylyl0517@126.com
  • 基金资助:

    国家“八六三”高技术研究发展计划项目（2012AA111802）

Structural optimization for reducing knee slider displacement in offset deformable barrier crash

YANG Li, GU Yulong   

  1. Shanghai HAIMA Automobile Research and Development Co., LTD, Shanghai 201201, China
  • Received:2014-05-19 Online:2014-12-25 Published:2014-12-29

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摘要：

在某次整车正面偏置碰撞试验中发现，根据中国新车评价规程(C-NCAP) 的评分规则，膝盖
滑动位移超标，得分较低。为改进相关部件的结构，根据实际的试验状态，建立约束系统模型，用
多刚体与有限元分析相结合的方法，仿真分析仪表板造型、结构强度以及约束系统；确定了一种仪
表板面板和杂物箱面板的结构优化方案；并进行了试验验证。结果表明：和原方案比较，该方案的膝
盖滑动位移由12.7 mm 降低到6.5 mm，膝部得分提高2.76 分。因此，该研究方法可用于结构优化，
缩短产品开发时间。

关键词: 汽车安全, 正面偏置碰撞, 膝盖滑动位移, 约束系统, 仪表板, 结构优化, 接触刚度

Abstract:

In an offset deformable barrier crash, it was found that the knee slider displacement was beyond
target and the score was lower than the expected one according to the assessment method by the China New
Car Assessment Program (C-NCAP). To solve the problem, some relevant structures were improved by the
authors. A multi-body model combined with the finite element method was built based on the vehicle test data
to simulate the cases of the instrument panel (IP) shape, the structure strength, and the supplemental restraint
system (SRS) to ascertain the improving direction. The optimized design of the dashboard and gloves box body
was verified by tests. The results show that the knee slider displacement reduces from 12.7mm to 6.5mm with
the femur score increasing 2.76 points. Therefore, the method can be used to optimize vehicle structures and
shorten the product development period.

Key words: automotive safety, offset deformable barrier crash, knee slider displacement, supplemental restraint system (SRS) , instrument panel (IP), structure optimization, contact surface stiffness