基于碰撞波形与约束系统耦合的汽车安全性改进

doi:10.19562/j.chinasae.qcgc.2021.10.012

Abstract

Abstract:

In the process of vehicle frontal crash， the coupling effect between body structures and restraint system directly affects occupant injuries. By combining theory and experience and using the evaluation method of the coupling relationship between crash waveform and restraint system， an analysis on the coupling relationship between the body structure and restraint system of a B-class passenger car is conducted， with body energy-absorbing structure and occupant restraint system modified. Final results indicate that the frontal crash star rating of that car is raised from three stars to five stars， effectively enhancing the safety performance of the vehicle.

Key words: crash waveform, occupant restraint system, coupling relationship evaluation, structure improvement

Hongbin Tang,Ledan Liu,Junyuan Zhang. Vehicle Safety Performance Improvement Based on Coupling Between Crash Waveform and Restraint System[J].Automotive Engineering, 2021, 43(10): 1504-1512.

Figures/Tables 27

References 11

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约束系统特性参数	数值
织带伸长率/%	10.0
限力水平/N	5 000
泄气孔直径/mm	45
转向柱压溃力/N	2 300

假人部位	伤害指标	数值
头部	HIC	382.47
胸部	压缩量/mm	26.09
颈部	颈部N_ij	0.32
	张紧力/kN	1.353
	圧缩力/kN	0.148
大腿	左腿力/kN	2.321
大腿	右腿力/kN	6.507
RRS		1.26
碰撞星级		3

参数分类	参数	数值
碰撞波形参数	G₁/g	19
	G₂/g	34
	t_E/s	0.060
	G_o/g	14.52
	K_AE/s^-2	609.57
约束系统刚度参数	k₁/（g·m^-1）	330
	k₂/（g·m^-1）	260.8
	G_L/g	29.7

参数	数值
G₁/g	21
G₂/g	25
t_E/s	0.071
G₀/g	11
K_AE/s^-2	383.44

结构名称	原始车体结构厚度/mm	改进车体结构厚度/mm
防撞梁	1.4	1.8
吸能盒-顶	1.8	2.2
吸能盒-内侧	1.8	2.5
吸能盒-外侧	2.3	2.5
纵梁前段-内侧	1.6	2.2
纵梁前段-外侧	1.4	1.6

Vehicle Safety Performance Improvement Based on Coupling Between Crash Waveform and Restraint System

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Figures/Tables 27

References 11

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结构名称	原始车体结构厚度/mm	改进车体结构厚度/mm
纵梁中段-内侧	4	2.2
纵梁中段-外侧	4	1.8
纵梁后段-内侧	4	2.4
纵梁后段-外侧	4	1.6

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