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为降低行人在碰撞过程中的损伤程度,探讨碰撞中的多元因素对人体损伤程度的影响机制,搭建人车碰撞仿真平台,建立人车碰撞数学模型,利用真实事故案例现场数据,验证模型的有效性。借助该仿真平台,计算在不同多元关联因素影响后的行人的运动学响应及损伤程度。研究表明:二次碰撞中行人头部损伤是导致行人死亡的主要原因;保险杠高度越接近胫骨高度,胫骨加速度和膝关节的弯曲角度越大;减小保险杠倾角能降低行人腿部损伤风险。
In order to reduce the degree of pedestrian damage during the collision, explore the mechanism of the impact of multiple factors in the collision on human body damage degree, set up the collision simulation platform of car and vehicle, establish the mathematical model of car-body collision, and validate the model by using the real accident case data Sex. With this simulation platform, the pedestrian’s kinematic response and the degree of injury were calculated under the influence of different multivariate correlation factors. The results show that the head injury of pedestrian in secondary collision is the main cause of pedestrian death. The closer the height of bumper is to the height of tibia, the greater the tibial acceleration and the bending angle of knee joint. Reducing the inclination of bumper can reduce the risk of pedestrian leg injury .