保险杠刚度特性对行人头部及下肢的损伤影响

doi:10.3969/j.issn.1674-8484.2023.01.002

汽车安全与节能学报 ›› 2023, Vol. 14 ›› Issue (1): 17-22.DOI: 10.3969/j.issn.1674-8484.2023.01.002

保险杠刚度特性对行人头部及下肢的损伤影响

刘天泉¹(), 王丙雨¹^,^*(), 吴贺², 邹俊¹, 毛明祥³

1.厦门理工学院机械与汽车工程学院，厦门 361024，中国
2.厦门大学航空航天学院，厦门 361102，中国
3.娄底市公安局交警支队直属二大队，娄底 417000，中国

收稿日期:2022-05-10 修回日期:2022-08-15 出版日期:2023-02-28 发布日期:2023-03-07
通讯作者: 王丙雨
作者简介:*王丙雨，讲师。E-mail： 2016000075@xmut.edu.cn。
刘天泉(1998—)，男(汉)，山东，硕士研究生。E-mail: Liutq3815@163.com。
基金资助:
福建省青年自然科学基金项目(2020J05235)

Effects of the bumper stiffness characteristics on the pedestrian head injuries and the lower extremities injuries

LIU Tianquan¹(), WANG Bingyu¹^,^*(), WU He², ZOU Jun¹, MAO Mingxiang³

1. School of Mechanical and Automotive Engineering, Xiamen University of Technology, Xiamen 361024, China
2. School of Aeronautics and Astronautics, Xiamen University, Xiamen 361102, China
3. Directly under the Second Brigade, Loudi City Public Security Bureau Traffic Police Detachment, Loudi 417000, China

Received:2022-05-10 Revised:2022-08-15 Online:2023-02-28 Published:2023-03-07
Contact: WANG Bingyu

摘要/Abstract

摘要：

用(美国)高速公路安全管理局(NHTSA)的某车辆有限元(FE)数字模型，研究了车辆保险杠刚度特性对行人头部及下肢损伤的影响。获取了 20~60 km/h碰撞速度下的保险杠刚度特性曲线。用多刚体仿真方法，研究了刚度为0~1.27 MN/m的保险杠对行人头部和下肢损伤的影响。结果表明：保险杠刚度对行人的整体运动学响应几乎没有影响，但对行人头部及下肢损伤有影响，且对下肢损伤的影响尤为显著。轿车在20 km/h与60 km/h所对应的保险杠接触力—形变曲线的刚度下，对行人头部的最大接触力分别为4.28 kN和4.26 kN，与行人小腿的最大接触力分别为3.94 kN和9.36 kN。因而行人下肢损伤风险随着保险杠刚度的增加而升高。

关键词: 汽车安全, 被动安全, 保险杠刚度特性, 头部损伤, 下肢损伤, 运动学响应, 有限元(FE)

Abstract:

The effect of bumper stiffness characteristics on the pedestrian head and lower extremity injuries was investigated by using a vehicle Finite Element (FE) analysis model of the National Highway Traffic Safety Administration (NHTSA) of the USA. Some bumper stiffness curves for 20, 40, and 60 km/h crash speeds were obtained by the FE method. The effects of bumper stiffnesses of 0~1.27 MN /m on pedestrian head and lower extremity injuries were conducted by using a multi-body simulation method. The results show that different bumper stiffnesses have almost no effect on the overall kinematic response of pedestrians, but have an extremity effect on the injuries for pedestrian head and lower limb, especially for lower limb injuries. The pedestrian's head maximum contact force is 4.28 kN and 4.26 kN respectively, and the pedestrian's lower leg maximum contact force is 3.94 kN and 9.36 kN respectively, at the stiffness of the bumper contact force-deformation curve corresponding to 20 km/h and 60 km/h. Therefore, the risk of pedestrian lower limb injury increases with the increase of bumper stiffness.

Key words: automotive safety, passive safety, bumper stiffness characteristic, head injury, lower extremity injury, kinematic response, Finite Element (FE)

中图分类号:

U461.91

刘天泉, 王丙雨, 吴贺, 邹俊, 毛明祥. 保险杠刚度特性对行人头部及下肢的损伤影响[J]. 汽车安全与节能学报, 2023, 14(1): 17-22.

LIU Tianquan, WANG Bingyu, WU He, ZOU Jun, MAO Mingxiang. Effects of the bumper stiffness characteristics on the pedestrian head injuries and the lower extremities injuries[J]. Journal of Automotive Safety and Energy, 2023, 14(1): 17-22.

图/表 8

图1 保险杠典型F-D曲线

图2 保险杠接触力传递示意图

图3 车体及ARUP腿型冲击器有限元模型

图4 车辆及行人多体模型

图5 不同车速下保险杠刚度特性曲线

图6 保险杠刚度对头部损伤的影响

图7 保险杠刚度对腿部损伤的影响

图8 车辆类型对行人整体运动学响应的影响

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保险杠刚度特性对行人头部及下肢的损伤影响

Effects of the bumper stiffness characteristics on the pedestrian head injuries and the lower extremities injuries

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