Effect of head rotation on neck responses under rear impact

doi:10.3969/j.issn.1674-8484.2023.03.003

Abstract

Abstract:

In order to study the effect of head and neck rotation posture of occupants on neck injury during low-speed rear collision, Global Human Body Models Consortium (GHBMC) head and neck model was used to change the head and neck posture through a flexible impactor. After activating the neck muscles of head-and neck finite element models with different poses, acceleration curve was applied to the first thoracic vertebra for low-speed rear collision simulation. The results show that the axial rotation angle of the right side of the head has a great influence on the motion of the occupant's head in the low speed rear collision. When the head and neck are in a rotating state, the activated neck muscles drive the head to turn quickly, resulting in the head hitting the side of the head pillow; Axial head rotation posture dose not affect the process of neck bending and backward extension during collision, but it affects the lateral bending and axial rotation of the neck. Among them, the horizontal lateral bending between the fourth and fifth cervical vertebrae is the most obvious. The peak value of right lateral bending neck injury under 0°, 20° and 40° head rotation posture is 0.11, 2.66 and 5.6, respectively.

Key words: automotive safety, low speed rear impact, head rotation, cervical spine injury, occupant injury

CLC Number:

U471.3

WU Hequan, GONG Chuangye, REN Qifan, ZHOU Huilai, MAO Haojie. Effect of head rotation on neck responses under rear impact[J]. Journal of Automotive Safety and Energy, 2023, 14(3): 282-289.

Figures/Tables 13

References 21

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右侧轴向旋转	C1-C2	C2-C3	C3-C4	C4-C5	C5-C6	C6-C7	C7-T1
20°	9.5	5.1	2.5	3.8	3.7	2.7	0.2
40°	27	5	3.3	4.9	1.5	4.1	0.7
颈椎最大旋转范围^[13]	±28.3	±5.6	±8.1	±5.9	±4.4	±4.8	±3.9

右侧轴向旋转	C1-C2	C2-C3	C3-C4	C4-C5	C5-C6	C6-C7	C7-T1
20°	9.5	5.1	2.5	3.8	3.7	2.7	0.2
40°	27	5	3.3	4.9	1.5	4.1	0.7
颈椎最大旋转范围^[13]	±28.3	±5.6	±8.1	±5.9	±4.4	±4.8	±3.9

运动类型	C1-C2	C2-C3	C3-C4	C4-C5	C5-C6	C6-C7	C7-T1
E	6.7	5.2	5.0	6.1	6.5	7.8	4.3
F	10.4	4.4	6.1	5.5	5.3	5.5	3.0
RAR	28.3	5.6	8.1	5.9	4.4	4.8	3.9
LAR	26.4	4.6	7.6	5.9	3.6	5.3	4.3
LLB	4.3	5.9	5.1	2.6	2.6	2.8	2.0
RLB	7.5	5.6	4.4	2.9	1.6	2.4	2.5

运动类型	C1-C2	C2-C3	C3-C4	C4-C5	C5-C6	C6-C7	C7-T1
E	6.7	5.2	5.0	6.1	6.5	7.8	4.3
F	10.4	4.4	6.1	5.5	5.3	5.5	3.0
RAR	28.3	5.6	8.1	5.9	4.4	4.8	3.9
LAR	26.4	4.6	7.6	5.9	3.6	5.3	4.3
LLB	4.3	5.9	5.1	2.6	2.6	2.8	2.0
RLB	7.5	5.6	4.4	2.9	1.6	2.4	2.5

运动类型	C1-C2	C2-C3	C3-C4	C4-C5	C5-C6	C6-C7	C7-T1
弯曲	-	2.7	3.0	1.9	-	2.3	3.5
伸展	-	-	1.2	2.9	2.0	1.9	3.9
侧弯	-	-	1.5	2.2	2.7	3.4	4.5