轿车-行人碰撞事故再现模型参数敏感性研究

A Study on Parameter Sensitivity in Accident Reconstruction Model for Car-pedestrian Crash

为确定对轿车行人事故再现结果有显著影响的参数,在动力学分析的基础上建立了轿车与行人的碰撞模型,筛选出影响事故再现结果的一般敏感性参数;再运用单因素试验方法对一般敏感性参数进行试验,进一步筛选出对再现结果影响较大的敏感性参数;在此基础上采用多因素分析法将敏感性参数按敏感度大小进行排序,参照所得结果对一起真实的车人碰撞事故进行再现仿真,所得结果与实际相吻合。最终表明,对再现结果有显著影响的参数为轿车碰撞前速度、驾驶员反应时间、减速度、轿车转弯偏角和接触位置,针对性地调整这些参数,能提高事故再现的精度。

To determine the parameters significantly influencing the results of car-pedestrian crash accident reconstruction, a car-pedestrian collision model is built based on dynamics analysis, and a number of general sensi-tive parameters affecting accident reconstruction results are selected. Next, single factor test is conducted on general sensitive parameters to further choose the sensitive parameters having significant effects on reconstruction results, which are then sorted according to their magnitude of sensibility by using multi-factor analysis technique. Taking the results as reference, the reconstruction simulation is performed on a real car-pedestrian crash accident with a result well agrees with real situation. Finally it is indicated that the parameters of car speed before crash, driver＇s response time, deceleration, car turning angle and contact position have significant effects on reconstruction results and tar-getedly adjusting these parameters can enhance the accuracy of accident reconstruction.