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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): 336-342.DOI: 10.3969/j.issn.1674-8484.2014.04.004

• 汽车安全 • 上一篇    下一篇

基于有限元- 多刚体耦合方法的儿童座椅结构改进

曹立波1，赵 净1，陈志宇2   

  1. 1. 湖南大学 汽车车身先进设计制造国家重点实验室，长沙 410082，中国；
    2. 福建麦凯婴童用品有限公司，诏安 363005，中国
  • 收稿日期:2014-07-02 出版日期:2014-12-25 发布日期:2014-12-29
  • 作者简介:曹立波（1964 －），男（汉），湖南，教授。E-mail: hdclb@163.com
  • 基金资助:

    国家“八六三”高技术研究发展计划项目（2012AA111802）

Structure improvement of a child seat with Dyna-Madymo coupling method

CAO Libo1, ZHAO Jing1, CHEN Zhiyu2   

  1. 1. Hunan University, State Key Laboratory of Advanced Design and Manufacturing for Vehicle Body, Changsha
    410082, China; 2. Baby Products Co., Ltd. Fujian Mackay, Zhao'an of Fujian Prov., 363005, China
  • Received:2014-07-02 Online:2014-12-25 Published:2014-12-29

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摘要：

对某反向安装儿童安全座椅的结构进行了改进设计。采用有限元- 多刚体耦合的方法，依
据欧洲经济委员会(ECE) 的法规R44 的要求，建立了改进前后的儿童安全座椅正面碰撞台车试验模型，
并进行了模型验证。完成了改进后的儿童安全座椅结构正面台车碰撞实验。仿真结果表明：座椅改进
后的儿童假人头部综合加速度峰值约降低15 g ；胸部综合加速度超过55 g 的时间缩短为2 ms ；胸
部垂向加速度超过30 g 的时间约为2.4 ms。台车试验结果与仿真结果一致，胸部综合加速度超过
55 g 的时间缩短为1.7 ms ；胸部垂向加速度超过30 g 的时间约为2.85 ms，且台车实验中座椅结构
未产生明显破坏。

关键词: 汽车, 被动安全, 儿童座椅, 结构改进, 有限元- 多刚体耦合

Abstract:

Structure improvement was made for a rear-facing child seat. Models of frontal impact sled test for
the original and the improved child seats were built and then simulated using Lsdyna-Madymo coupling method
referring to the Regulation No. 44 by the Economic Commission for Europe. A front impact sled test was made
with a sample of the improved child seat. The results show that the peak of the resultant head acceleration
reduces 15 g, the time in which the resultant chest acceleration exceeds 55 g is cut in 2ms, and the time in
which the chest acceleration vertical component exceeds 30 g is 2.4ms when using the improved child seat.
The test results are in accordance with the simulation results. The time in which the resultant chest acceleration
exceeds 55 g is cut in 1.7ms, and the time in which the vertical component of the chest acceleration exceeds 30 g
is 2.85ms, without obvious structure damage during the sled test.

Key words: motor vehicle, passive safety, child seat, structure improvement, Lsdyna-Madymo coupling method