儿童安全座椅侧面碰撞头部保护研究

doi:10.19562/j.chinasae.qcgc.2021.09.013

Abstract

Abstract:

According to the requirements of European child occupant restraint system regulation （ECE R129）， a sled seat restraint system model is established， with a speed curve specified in the regulation applied to simulate the head injury of child occupants on rear-row seat in a side collision accident. Through the sled test of side impact， the effectiveness of the finite element model built is verified. By compression test， the mechanical properties of expanded polypropylene （EPP） with a foaming rate of 30 times are measured and it is determine to use the material card MAT83 with strain rate effect to simulate the mechanical response of EPP headrest under collision conditions. With the 3 ms head acceleration and HPC of child occupants as evaluation indicators， the protective effects on child occupant head of EPP and ordinary materials are comparatively analyzed. The results show that compared with ordinary material， by using EPP headrest， the HPC and 3 ms head acceleration of Q3 dummy model is lowered by 24.9% and 8.1% respectively， effectively reducing the injury of child’s head in car side collision.

Key words: child safety seat, EPP, side collision, head injury

Lü Mengkuan,Xin Yang,Shucai Xu,Binbing Huang,Shaopeng Li,Peng Huo,Yongliang Bian. Research on Head Protection of Child on Safety Seat in Side Collision[J].Automotive Engineering, 2021, 43(9): 1360-1366.

Figures/Tables 17

References 17

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参数	数值
密度/（kg·mm^-3）	2.87×10^-8
弹性模量/GPa	1.128×10^-2
DAMP	0.05
HU	0.3
SHAPE	20

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Research on Head Protection of Child on Safety Seat in Side Collision

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