基于Euro NCAP典型工况的儿童行人下肢损伤评估方法研究  

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

作　　者：李海岩[1] 李琨[1] 黄永强 贺丽娟[1] 崔世海[1] 吕文乐[1] 阮世捷[1] Li Haiyan;Li Kun;Huang Yongqiang;He Lijuan;Cui Shihai;Lü Wenle;Ruan Shijie(Tianjin University of Science and Technology,International Research Association on Emerging Automotive Safety Technology,Tianjin 300222)

机构地区：[1]天津科技大学,现代汽车安全技术国际联合研究中心,天津300222

出　　处：《汽车工程》2022年第6期893-899,918,共8页Automotive Engineering

基　　金：国家自然科学基金(81371360,81471274,81201015);国家重点研发计划(2018YFC0807203)资助。

摘　　要：本文中采用Euro NCAP行人模型认证(TB024)中给出的FCR、MPV、RDS、SUV 4种典型汽车前端结构有限元模型,以及具有详细解剖学结构特征的6岁儿童行人有限元模型来模拟汽车-行人碰撞事故,分析典型工况下汽车前端结构参数对儿童行人下肢损伤的影响。结果表明,RDS车型由于机盖前沿离地间距较小,儿童行人撞击侧股骨大转子位置出现骨折现象;MPV和SUV车型由于扰流板离地间隙较大,对下肢胫骨、腓骨和膝关节韧带的损伤更为严重。最后,基于仿真结果提出了6岁儿童下肢长骨损伤的截面弯矩评价参数,为儿童腿型冲击器研发和数字测评提供参考。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.

关 键 词：车辆 儿童行人保护 汽车-行人碰撞 下肢损伤 

分 类 号：U467.14[机械工程—车辆工程]