中国体征3岁儿童乘员损伤仿生模型在C-NCAP正面碰撞测试仿真中的应用

doi:10.19562/j.chinasae.qcgc.2022.12.016

Abstract

Abstract:

In this paper， the validated TUST injury bionic model of Chinese three-year-old child occupant （TUST IBMs 3YO-O） with detailed anatomical structure features is used to build a simulation model， according to two dynamic frontal crash test specifications specified in C-NCAP （2001 version）. A simulation is conducted to analyze the kinematic and biomechanical responses of the head， neck and chest and study the injury mechanism and the injury discrepancy of three-year-old child occupant in different conditions during frontal crash evaluation test. The results show that in the aspect of kinematic response， the injury risk of three-year-old child occupant in the frontal 50% overlap mobile progressive deformable barrier （MPDB） crash test is higher than that in the frontal 100% overlap rigid barrier （FRB） crash test， and the child farther away from the impact point has more serious injuries. In the aspect of biomechanical response， the three-year-old child occupant may suffer a mild concussion due to the lower jaw contacting the chest in the FRB crash test， while in the MPDB crash test， the child moves transversely toward left with the lower jaw contacting the right side of chest， leading to a larger peak biomechanical response， and may inducing minor concussion， rib fracture， lung contusion and other injuries.

Key words: C-NCAP, frontal crash, child occupant, injury mechanisms, biomechanical response

Haiyan Li,Hangjie Su,He Zhu,Chong Liu,Yanxin Wang,Shihai Cui,Lijuan He,Yida Wang,Lü Wenle. The Application of the Injury Bionic Model of Chinese Three-year-old Child Occupant to the Simulation of C-NCAP Frontal Crash Tests[J].Automotive Engineering, 2022, 44(12): 1944-1953.

Figures/Tables 10

References 23

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响应类型	损伤评价指标	FRB	MPDB 后排右侧	MPDB 后排左侧	阈值
运动学响应	HIC₁₅	257	691	677	高性能限值500 低性能限值700
	头部累积3 ms合成加速度	54g	89g	79g	高性能限值60g 低性能限值80g
	BrIC	1.19	1.97	1.77	1，45%概率AIS 4级脑损伤
	颈部张力	435 N	331 N	314 N	高性能限值1 555 N 低性能限值2 840 N
	胸部累积3 ms合成加速度	58g	54g	58g	高性能限值41g 低性能限值55g
	胸部最大变形量	29 mm	30 mm	29 mm	40 mm
	胸部最大压缩比	23.3%	23.5%	23.3%	35%
生物力学响应	脑组织Von Mises应力	5 kPa	8 kPa	7 kPa	6-11 kPa，脑挫伤大于15 kPa，轻微脑震荡大于38 kPa，重度脑损伤^［18］
	脑组织颅内压	184 kPa	374 kPa	277 kPa	大于173 kPa，轻度脑损伤大于235 kPa，致命脑损伤^［19］
	脑组织剪切应力	6.0 kPa	8.8 kPa	8.2 kPa	6 kPa，25%概率轻度脑损伤 7.8 kPa，50%概率轻度脑损伤 10 kPa，80%概率轻度脑损伤 25 kPa，100%概率中度脑损伤^［20］
	脑组织最大主应变MPS	0.34	0.41	0.42	0.45，50%概率轻微脑震荡^［21］
	肺部第一主应变	0.17	0.29	0.28	大于0.35，肺挫伤^［22］
	心脏第一主应变	0.11	0.10	0.09	大于0.3，心脏挫伤^［23］

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The Application of the Injury Bionic Model of Chinese Three-year-old Child Occupant to the Simulation of C-NCAP Frontal Crash Tests

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