碰撞条件下行人腿部保护装置数值仿真研究  

Numerical Simulation Research on Pedestrian Leg Protection Device under Collision Conditions

作　　者：范戈阳 邓喆 欧广琪 周灿 闫凯波 Fan Geyang;Ou Guangqi;Deng Zhe

机构地区：[1]重庆交通大学机电与车辆工程学院,400074

出　　处：《工程机械》2024年第8期183-188,I0019,共7页Construction Machinery and Equipment

基　　金：2023年国家级大学生创新训练项目(202310618019)。

摘　　要：为在碰撞事故中更好地保护行人,提出一种安装在车身前端的配有气囊的行人腿部保护装置。依据GB/T24550—2009《汽车对行人的碰撞保护》,对腿型冲击器进行有限元仿真分析。分析结果显示:汽车在40 km/h的速度下正碰腿型冲击器时,无气囊条件下的腿部加速度为172.29g,弯曲角度为23.17°,剪切位移为7.08 mm,超出法规阈值;而在有气囊的情况下,腿部加速度降低至126.91g,弯曲角度减小至11.41°,剪切位移减小至4.97 mm,符合法规要求。To better protect pedestrians in collision accidents,a pedestrian leg protection device with an airbag mounted at the front of the vehicle is proposed.According to GB/T 24550-2009,The protection of motor vehicle for pedestrians in the event of a collision,finite element analysis of the leg impactor is carried out.The analysis results show that,when the motor vehicle frontally collides with the leg impactor at a speed of 40 km/h,without an airbag,the leg acceleration is 172.29 g,the bending angle is 23.17°,and the shear displacement is 7.08 mm,exceeding the threshold values in the regulation.In the presence of an airbag,the leg acceleration drops to126.91g,the bending angle drops to11.41°,and the shear displacement drops to4.97 mm,which meets the requirements of the regulation.

关 键 词：行人保护 有限元分析 汽车碰撞 腿型冲击器 

分 类 号：U467.14[机械工程—车辆工程]