不同坐姿的6岁儿童乘员在MPDB碰撞测试中头颈部损伤评价

doi:10.19562/j.chinasae.qcgc.2021.12.008

Abstract

Abstract:

In this paper， threevalidated finite element models for 6-year-old child with different sitting posturesand having detailed anatomical structures are established， on which the deceleration curve of a SUVobtained in a crash test against mobile progressive deformable barrier （MPDB） with 50% overlap is applied to investigate the effects of sitting postures on the injury severity of the head and neck of a 6-year-old child by comparing his kinematic parameters of head and neck and biomechanical parameters of brain tissue under different sitting postures. The results show that in MPDB collision condition， head rotation load is the main cause of head injury and the increase of sitting posture angle will lead to the increase of the risk of brain tissue inertia injury without the rise of neck injury risk.

Key words: different postures, child occupant, MPDB test, head and neck injuries

Haiyan Li,Yanxin Wang,Lijuan He,Lü Wenle,Shihai Cui. Evaluation of Head and Neck Injuries of a Six-year-old Child Occupant with Different Sitting Postures During a MPDB Crash Test[J].Automotive Engineering, 2021, 43(12): 1793-1799.

Figures/Tables 10

References 17

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名称	阈值	105°坐姿	120°坐姿	135°坐姿
HPC₁₅	700	281.36	349.93	380.99
a_h3ms/g	80	53.67	61.26	67.10
F_x/N	1 950	643.77	591.02	521.40
F_z/N	2 840	941.25	791.65	739.47
M_y/（N·m）	49	11.93	6.72	3.17
N_ij	1	0.46	0.35	0.30
Von Mises应力/kPa	15	13	16	23
剪切应力/kPa	8（轻度）	15	17	26
剪切应力/kPa	16（严重）	15	17	26
最大主应变	0.1	0.131	0.158	0.185

Evaluation of Head and Neck Injuries of a Six-year-old Child Occupant with Different Sitting Postures During a MPDB Crash Test

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