Effect of vehicle crash severity and advanced restraint system parameters on occupant injuries

doi:10.3969/j.issn.1674-8484.2025.05.004

Abstract

Abstract:

Aiming at the matching problem of advanced restraint system in vehicle crashes, the distribution frequencies of vehicle Occupant Load Criterion (OLC) and the advanced restraint system parameters during the frontal rigid barrier collisions conducted over the recent three-year of a company were statistically analyzed. A Finite Element (FE) for crash simulation matrix was established. The Kruskal-Wallis non-parametric test and the Spearman correlation analysis methods were used to investigate the vehicle OLC effect and the restraint system parameters on occupant injuries. The results show that the increased OLC significantly increases the occupant injuries severities (the correlation coefficient ρ=0.66, the significance p value<0.01) while the airbag vent size and the retractor TTF (time to fire) cannot significantly affect occupant injuries. The increased seatbelt first-level load limiter mitigates head injury but increases chest compression. Using the Pyrotechnic Lap Pretension (PLP) to pretension lap belt and the Crash Locking Tongue (CLT) to cut off the transfer of seatbelt forces can slightly decrease the chest compression. Moreover, the occupant hip restraint is enhanced and the movements of hip and legs are reduced, which alleviate the vehicle interior-leg impact severity and significantly reduce the lower limbs injury risks.

Key words: vehicle safety, occupant injury, impact severity, advanced restraint system, pyrotechnic lap pretension (PLP), crash locking tongue (CLT)

CLC Number:

U461.91

DENG Gongxun, CAI Yani, LEI Feibing, LIU Hengjin, QI Lulin, FAN Yubo. Effect of vehicle crash severity and advanced restraint system parameters on occupant injuries[J]. Journal of Automotive Safety and Energy, 2025, 16(5): 698-706.

Figures/Tables 16

References 21

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评价指标	CFC	CORA
头部加速度	1 000	0.78
胸部加速度	600	0.71
骨盆加速度	1 000	0.80
胸部压缩位移	180	0.85
肩带力B3	60	0.80
腰带力B6	60	0.78

评价指标	CFC	CORA
头部加速度	1 000	0.78
胸部加速度	600	0.71
骨盆加速度	1 000	0.80
胸部压缩位移	180	0.85
肩带力B3	60	0.80
腰带力B6	60	0.78

乘员载荷准则OLC / g	25、26、27、28、29、30、31、32、33、34、35
气囊泄气孔径 / mm	20、25、30
气囊点火时间 / ms	15、18、20
安全带限力等级* / Nm	32、49、60、49+26、49+36、60+26、60+36、70+26、70+36
卷收器点火时间 / ms	13、16、19
PLP + CLT**	0、1

乘员载荷准则OLC / g	25、26、27、28、29、30、31、32、33、34、35
气囊泄气孔径 / mm	20、25、30
气囊点火时间 / ms	15、18、20
安全带限力等级* / Nm	32、49、60、49+26、49+36、60+26、60+36、70+26、70+36
卷收器点火时间 / ms	13、16、19
PLP + CLT**	0、1

评价指标	损伤阈值
HIC	500~700
a_3-ms	72g~80g
F_x_{, ne}	1.9~3.1 kN
F_z_{, ne}	2.7~3.3 kN
M_y_{, ne}	42~57 Nm
D_ch	22~50 mm
F_z_{, fe}	3.80~9.07 kN
S_kn	6~15 mm
F_z_{, ti}	2~8 kN
TI	0.4~1.3