Study On The Reconstruction Of Car-electric Bicycle Side-Impact Collisions And The Influence Of Its Parameters

With the yearly increase of car ownership in China,traffic accidents are becoming more and more frequent.Among them,collision accidents between cars and electric bicycles account for a large proportion,and the fatality rate is extremely high,bringing great threats to people’s lives and property.In the process of assigning responsibility for such accidents,the collision speed of the car is an important basis for the division of responsibility,but the traditional accident speed calculation model is less accurate.Therefore,this paper is based on computer simulation technology,combining with uncertainty assessment method and orthogonal test method to study the influence parameters of the side collision accident between car and electric bicycle,to explore the general law of collision accident in depth,which aims to achieve the accurate calculation of car collision speed and accident reconstruction.The main research contents are as follows:This paper introduces the investigation process of car-electric bicycle collision and its collected accident information from the traffic accident investigation,deeply analyzing the causes of such accidents,and the collision process,studying the typical collision patterns of car-electric bicycle accidents,and outlines the common speed calculation methods in accidents.In order to improve the accuracy of the vehicle speed calculation model,the parameters with uncertainty in the model are analyzed and evaluated to get the value interval of the collision vehicle speed.Twelve parameters,such as car collision speed and position of vehicle collision,are selected for collision simulation in PC-Crash software to analyze the sensitivity of the parameters to the collision results and get the weight ranking of parameter influence.Based on the parameter sensitivity ranking,the relationship between the four parameters of vehicle collision speed,collision position,hood length and the rider sitting height and the displacement of the rider and e-bike is further studied,and the regression analysis of the test results is carried out to obtain the regression equation of vehicle speed based on the displacement of the rider and e-bike.Finally,two real cases of side-impact collisions between cars and e-bikes were selected to calculate the collision speed based on the uncertainty assessment method and the speed regression equation,and the accident was reproduced using PC-Crash software to verify the effectiveness and practicality of the above speed calculation method.This paper obtained the uncertainty assessment vehicle speed and speed regression equation through simulation test,which reduces the error caused by data uncertainty and improves the accuracy and reliability of speed calculation results,and has significant value in speed calculation and analysis of accident causes.