中文摘要：

以多刚体动力学分析方法，通过动力学仿真，对汽车与行人碰撞事故建模并进行模拟碰撞，得出行人数学模型的伤害指标．在模拟可靠性得到保证的基础上，通过对汽车前部的设计参数进行灵敏度分析，修改主要的设计参数，使汽车对行人保护的性能得到改进．通过模拟使用引擎盖升起机构后汽车与行人碰撞事故，得到的伤害指标与原始汽车模型对行人的伤害指标进行比较，发现引擎盖升起机构对行人可以起到有效的保护作用．

英文摘要：

Based on the multi-body system, the injury index of the mathematic model of pedestrian is studied by simulating the motion of the pedestrian impacted by vehicle using ADAMS. The dependability of simulation is verified by Comparing with the article published. Then sensitivity analysis is carried out in order to design parameters of the automobile. Research on the pedestrian protection is studied by revising the sensitive design parameter. The injury index of pedestrian is simulated again when the hood raise structure is installed. Comparison shows that the hood raise structure is effective for protecting pedestrians.