School of Automobile and Mechanical Engineering, Changsha University of Science and Technology, Changsha 410076, China.
Forensic Sci Int. 2011 Apr 15;207(1-3):135-44. doi: 10.1016/j.forsciint.2010.09.019. Epub 2010 Oct 30.
Through theoretical analysis and introduction of some empirical parameters, the relationship between post-braking-distance and throw distance was studied concentratedly. Here, the post-braking-distance is the distance a vehicle will travel from the impact position to when it comes to a complete stop. Two useful formulas which are meaningful in vehicle-pedestrian accident reconstruction were finally obtained. The first one can be used to calculate impact speed according to throw distance, while the other one can describe the relationship between post-braking-distance and throw distance. Their feasibility has been validated by comparing with other scholars' empirical formulas and simulation results of software Pc-Crash, respectively. The relationship between post-braking-distance and throw distance has very bright application perspective in vehicle-pedestrian accident reconstruction such as helping policemen obtain more useful evidences, validating credibility of the throw distance, judging whether the vehicle is fully braked or not, determining the impact position etc. Finally its application was demonstrated by three cases, in which the impact speed was also calculated. All results until now have shown that conclusions obtained in this article are feasible and helpful in vehicle-pedestrian accident reconstruction.
通过理论分析和引入一些经验参数，集中研究了制动后距离与抛出距离之间的关系。这里，制动后距离是指车辆从撞击位置到完全停止所行驶的距离。最终得到了两个在车辆行人事故重建中非常有用的公式。第一个公式可用于根据抛出距离计算碰撞速度，而另一个公式则可以描述制动后距离与抛出距离之间的关系。它们的可行性已经通过与其他学者的经验公式和 Pc-Crash 软件的模拟结果进行比较得到了验证。制动后距离与抛出距离之间的关系在车辆行人事故重建中具有非常广阔的应用前景，例如帮助警察获取更多有用的证据、验证抛出距离的可信度、判断车辆是否完全制动、确定撞击位置等。最后通过三个案例展示了其应用，其中还计算了碰撞速度。到目前为止的所有结果都表明，本文得出的结论在车辆行人事故重建中是可行和有帮助的。
