基于Euro NCAP典型工况的儿童行人下肢损伤评估方法研究

doi:10.19562/j.chinasae.qcgc.2022.06.011

Abstract

Abstract:

In this paper， the finite element models for the front-end structure of four typical vehicles， i.e. family car （FCR）， multi-purpose vehicle （MPV）， roadster （RDS） and sport utility vehicle （SUV） specified in Pedestrian Human Model Certification （TB024） of the Euro NCAP protocol and a finite element model for six-year-old child pedestrian with detailed anatomical and structural features are used to simulate the child pedestrian-car crash accident with the effects of the structural parameters of vehicle front-end on the lower extremity injuries of children pedestrians analyzed under typical conditions. The results show that the RDS causes the fractures in the greater trochanter of impact-side femur of children pedestrians due to the smaller ground clearance of the front edge of engine hood， and the high ground clearance of the spoiler in MPV and SUV leads to the more severe injuries in tibia， fibula and knee ligament of lower limbs. Finally a parameter of sectional bending moment of long bones is proposed for assessing the lower extremity injury of six-year-old child pedestrian based on the simulation results， providing references for the development and digital assessment of child's leg impactor.

Key words: vehicles, child pedestrian protection, car-pedestrian crash, lower extremity injury

Haiyan Li,Kun Li,Yongqiang Huang,Lijuan He,Shihai Cui,Lü Wenle,Shijie Ruan. Research on Assessment Method of Lower Extremity Injury of Child Pedestrian Under Typical Conditions Specified in Euro NCAP TB024[J].Automotive Engineering, 2022, 44(6): 893-899.

Figures/Tables 11

References 20

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车型	扰流板离地间隙/mm	保险杠宽度/mm	机盖前缘高度/mm	汽车质量/kg
FCR	224.8	87.7	739.6	1 729.3
MPV	243.0	104.9	782.5	1 637.2
RDS	193.2	55.7	657.1	1 495.6
SUV	289.1	70.0	904.1	1 823.4

车型	FCR	MPV	RDS	SUV
膝关节韧带损伤	16 ms对撞侧MCL断裂	17 ms对撞侧MCL断裂	15 ms对撞侧MCL断裂	18 ms对撞侧MCL断裂
	24 ms撞击侧MCL断裂	27 ms撞击侧MCL断裂	24 ms对撞侧LCL断裂	26 ms撞击侧MCL断裂
	27 ms对撞侧LCL断裂	32 ms对撞侧LCL断裂	30 ms对撞侧ACL断裂	33 ms对撞侧LCL断裂
	33 ms对撞侧PCL断裂	36 ms对撞侧PCL断裂		38 ms对撞侧PCL断裂
	39 ms对撞侧ACL断裂	42 ms对撞侧ACL断裂		39 ms对撞侧ACL断裂

车型	下肢长骨弯矩/（N·m）
车型	Femur1	Femur2	Femur3	Tibia1	Tibia2	Tibia3	Tibia4
FCR	86.3	92.3	91.3	75.8	69.9	64.4	50.7
MPV	90.3	92.4	103.3	87.3	84.2	75.2	61.6
RDS	68.7	102.8	124.4	67.2	59.1	56.8	41.7
SUV	76.4	83.6	82.7	71.9	64.7	57.2	51.7

车型	撞击侧	对撞侧
FCR	26.2	28.9
MPV	27.5	29.2
RDS	16.6	16.5
SUV	25.2	26.1

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Research on Assessment Method of Lower Extremity Injury of Child Pedestrian Under Typical Conditions Specified in Euro NCAP TB024

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