基于人车相互作用时间的人地碰撞损伤防护新视角

A new perspective of protecting pedestrian-ground contact injury based on the pedestrian-vehicle interaction time

采用PC-Crash再现145例人车碰撞事故视频案例,通过调整车辆制动以延长案例中的人车相互作用时间,采集行人抛距、人体各部位损伤及人车相互作用时间等参数并分析所得数据。结果显示:人车相互作用时间与人地碰撞损伤显著负相关;延长人车相互作用时间能显著降低地面所致头部、臀部损伤及车速≥40 km/h的胸部损伤,且不会明显增加地面所致四肢及车辆所致头、胸部和臀部的损伤。研究结果表明可从人车相互作用时间角度出发探索人地碰撞损伤防护的新方法。

145 accidents with videos were reconstructed by PC-Crash firstly,and then the vehicle braking is adjusted to prolong the pedestrian-vehicle interaction time in each case,finally parameters such as pedestrian throw distance,pedestrian injury and the interaction time were collected and ana‐lyzed by graphing and statistical method.Results shown that there is a significant negative correlation between the pedestrian-vehicle interaction time and the ground related injury;the ground related injury of the head,the pelvis and the torso(when the impact speed≥40 km/h)can be reduced significantly by prolonging the interaction time;the ground related injury of four limbs and vehicle related injury of head,torso and pelvis will not change obviously when the interaction time were prolonged.This indi‐cates that new approaches for protecting the ground related injury can be explored from the perspective of the pedestrian-vehicle interaction time.