Biomechanical analysis of occupant damage in different sitting positions in the rear seat in a frontal collision

doi:10.3969/j.issn.1674-8484.2023.06.005

Abstract

Abstract:

In order to study the biomechanical characteristics of frontal collision injury of rear occupant in different sitting positions, the finite element simulation analysis method was used to analyze the biomechanics of THUMS AM50 occupant in the 50 km/h frontal collision under the normal sitting position, 15° left leaning and 15° right leaning. Aiming at the 15° left leaning sitting position, the collision protection strategy was studied by using the 3+2 point seat belt and the rear forward airbag. The results show that the most serious injury is caused by sitting posture of 15° left tilt, so the use of the 3+2 point seat belt can effectively reduce the head injury of passengers, and the use of rear forward airbag can greatly protect the head and chest of passengers. The strategy of using rear forward airbag has a good protection effect on the passengers who are leaning to the left and right. In the future, it is necessary to strengthen the research on the protection of rear passenger, so as to adapt to different collision conditions and complex and changeable occupant sitting posture.

Key words: rear seat occupants, frontal collision, occupant sitting position, injury biomechanics

CLC Number:

U467.1+4

WU Hequan, ZHOU Huilai, LI Yihui, HU Lin. Biomechanical analysis of occupant damage in different sitting positions in the rear seat in a frontal collision[J]. Journal of Automotive Safety and Energy, 2023, 14(6): 688-697.

Figures/Tables 22

References 14

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	HIC₁₅	a_head,max / g	BrIC
NSP	179.7	73.2	0.92
OOP_L15	1 946.0	172.0	1.03
OOP_R15	490.3	86.4	0.89

	HIC₁₅	a_head,max / g	BrIC
NSP	179.7	73.2	0.92
OOP_L15	1 946.0	172.0	1.03
OOP_R15	490.3	86.4	0.89

	F_{neck, max}/ MPa
	ALL	PLL	CL	LF	ISL
NSP	0.34	0.66	1.66	0.51	2.32
OOP_L15	1.30	0.67	1.96	0.51	1.38
OOP_R15	0.29	0.56	1.56	0.46	1.62

	F_{neck, max}/ MPa
	ALL	PLL	CL	LF	ISL
NSP	0.34	0.66	1.66	0.51	2.32
OOP_L15	1.30	0.67	1.96	0.51	1.38
OOP_R15	0.29	0.56	1.56	0.46	1.62

坐姿		NSP	OOP_L15	OOP_R15
骨折情况		5根 (L₁, L₇, L₈, L₁₀, R₁)	3根 (L₈, R₃, R₇)	4根 (L₁, R₁, R₃, R₇)
骨折位置
胸部最大压缩量 / mm	左上	18.1	4.8	8.9
	右上	9.1	19.9	11.6
	左下	52.4	59.5	43.1
	右下	26.1	9.4	3.1
	上侧	26.8	10.7	27.5
	下侧	16.8	34.3	2.2
最大塑性应变/ MPa	心脏	0.27	0.37	0.71
	肝脏	0.58	0.31	0.22
	脾脏	0.32	0.33	0.18
	肺部	0.46	0.41	0.39