行人保护气囊设计与验证

Design and Verification of Pedestrian Protection Airbag

在近几年我国实际交通事故中,超过70%的事故涉及弱势道路使用者,汽车对他们的保护需求日益凸显。本文中基于一款A级轿车,对能保护弱势道路使用者头部、并与弹起式发动机罩相配合的保护气囊(简称行人气囊)进行了设计和验证。首先,设计行人气囊的包型和布置,基于弹起式发动机罩仿真行人气囊头型冲击、联动展开等工况;其次,利用试验和理论推导对仿真结果进行验证,修正行人气囊和弹起式发动机罩的关键参数;最后,基于C-NCAP头型冲击试验,探究该行人气囊的保护效果。试验结果表明,基于该车开发的行人气囊对头部的保护效果良好,伤害降低60%以上,得分率高达93.1%。

In recent years,more than 70%of the real traffic accidents in China are related to vulnerable road users,and the requirements for cars to protect them are becoming more and more prominent.Based on an A-class car,a vulnerable road user protection airbag(pedestrian airbag for short thereafter),which can protect their head and can be coordinated with pop-up bonnet,is designed and verified in this paper.First,the shape and layout of pedestrian airbag are designed and some operation conditions of pedestrian airbag including the collision of headform impactor against and linked deployment with pop-up bonnet are simulated.Then,by means of test and theoretical derivations,simulation results are validated and key parameters of pedestrian airbag and pop-up bonnet are revised.Finally,a C-NCAP headform collision test is conducted to investigate the protection effects of pedestrian airbag with pop-up bonnet.The results show that the pedestrian airbag developed has good protective effect of pedestrian head and can reduce injury by over 60%and get a high scoring rate up to 93.1%.