论文部分内容阅读
在车辆与行人碰撞中,行人头部和胸部为行人两大致命损伤部位。本文应用THUMS行人有限元模型,分析了行人在中型轿车、微型轿车、1Box和SUV等4类不同前部结构车辆和碰撞速度为20km/h、30km/h、40km/h、50km/h的条件下行人动力学响应,及头部和胸部碰撞速度,并根据计算得到的头部HIC值和胸部压缩量分析了致命损伤风险。结果表明,车辆碰撞速度和汽车前部结构形状是影响行人动力学响应和损伤严重度的两大主要因素,减小车辆碰撞速度至30km/h或更低是减轻行人致命损伤风险的有效途径。在中型轿车和SUV碰撞中的主要损伤部位是头部,而在1Box碰撞中是胸部损伤。在微型轿车碰撞中,在头部未与A柱碰撞时,其致命损伤风险较低。分析结果为研发行人损伤防护型的车辆前部结构提供理论指导,如较短的汽车前部结构和较大面积的风挡玻璃有助于减轻行人的致命损伤。
In the collision between vehicles and pedestrians, the head and chest of pedestrians are the two fatal injuries to pedestrians. In this paper, pedestrian finite element model of THUMS pedestrian was used to analyze the impact of pedestrians on four types of front-end vehicles such as midsize sedan, mini sedan, 1Box and SUV, and collision speed of 20km / h, 30km / h, 40km / h and 50km / h Downstream kinetic response, head and chest collision velocity, and the risk of fatal injury were analyzed based on the calculated head HIC and chest compression. The results show that the vehicle collision speed and the shape of the front of the vehicle are the two major factors affecting the pedestrian dynamic response and the severity of the damage. Reducing vehicle collision speed to 30km / h or less is an effective way to reduce the risk of fatal injury to pedestrians. The main site of injury in the midsize sedan and SUV collision was the head, while in the 1Box collision the chest injury. In a minicar crash, the risk of a fatal injury is low when the head does not collide with the A-pillar. The results of the study provide theoretical guidance for the development of pedestrian damage protection front vehicle structures such as a shorter vehicle front structure and a larger area of windshield glass to help reduce pedestrian fatal injuries.