误使用工况下儿童安全座椅安全性的开发与验证

doi:10.19562/j.chinasae.qcgc.2021.12.006

Abstract

Abstract:

The top tether strap is one of the anti-reversal devices of ISOFIX type child safety seat （CSS）， and its misuse will reduce the protective performance of CSS. According to the requirements of the dynamic test with anti-reversal device does not function provisioned in GB27887—2011， the use of carbon fiber reinforced plastics（CFRP）for CSS is proposed to strengthen the protection of children in the condition of the misuse of top tether strap in frontal crash.Both computer simulation and sled collision test are conducted on the Q-series dummy for 3-years-old child （Q3） to compare the injury of child dummy on the CSS of CFRP and the CSS of common plastics in the condition of the misuse of top tether strap. The results of test show that in the condition of the misuse of top tether strap，compared with the CSS of common plastics，the maximum forward displacement of Q3 dummy’s headwith the CSS of CFRP reduces by 18.49% and the chest acceleration of Q3 dummy lowers by 2.71%， strengthening the protection of children.

Key words: vehicle passive safety, child safety seat, frontal crash, carbon fiber reinforced plastics, misuse

Xiangwen Song,Meng Zou,Shucai Xu,Binbing Huang. The Safety Development and Validation of Child Safety Seat Under the Condition of Misuse[J].Automotive Engineering, 2021, 43(12): 1780-1786.

Figures/Tables 22

试验类型	平均厚度/mm	平均宽度/mm	平均孔径/mm	加载速度/ （mm·min^-1）	标准
开孔拉伸	2.9 （2-4）	36.12 （36 $±$ 1）	5.97 （6 $± 0.06$ ）	2	ASTM D 5766/D 5766M—02a
开孔压缩	2.85（3-5）	36.12（36 $± 0.25$ ）	5.97 （6 $± 0.06$ ）	2	ASTM D 6484/D 6484M—04
钉孔挤压（A方法）	2.84（3-5）	36.13（36 $±$ 1）	6（ $60 + 0.03$ ）	2	ASTM D 5961/D 5961M—01
短梁剪切	2.23	6.03	无	1	ASTM D 2344/D 2344M—00

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试验项目	试验强度值/MPa	仿真强度值/MPa	相对误差/%
开孔拉伸	222.50	204.62	-8.04
开孔压缩	236.50	211.00	-10.78
钉孔挤压	751.41	738.25	-1.75
短梁剪切	52.29	50.89	-2.68

项目	头部前向最大位移/mm	胸部合成加速度/g
目标值	550	5
仿真值	456.4	31.3
试验值	485	35.9
偏差	5.9%	12.8%

项目	头部前向最大位移/mm	胸部合成加速度/g
目标值	550	55
CFRP儿童安全座椅值	485	35.9
普通塑料儿童安全座椅值	595	36.9
性能提升百分比	18.49%	2.71%

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The Safety Development and Validation of Child Safety Seat Under the Condition of Misuse

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