Modeling and Analysis Method of Vehicle-pedestrian Crash Accidents Based on Contact Characters

Abstract

Injury of pedestrian and deformation of vehicle are the important information in the accidents.In the simulation analysis for vehicle-pedestrian crash accident,usually it uses vehicle model by rigid ellipsoid and the numerical dummy with the standardizing body.The shape error causes large different on the simulation results,and there is large penetrate in the contact position between vehicle and pedestrian when the speed is high.Based on the scaling technology,the method for estimating the anthropometry parameters of the six main parts of the given victim is studied.On the other hand,the true shape vehicle model based on shell element is adopted.The contact position between vehicle and pedestrian uses plastic materials and the equivalent stiffness curve of material is established to simulate the real contact and vehicle deformation.Through the equivalent contact model establishment between vehicle and pedestrian,it can improve simulation accuracy,and realize the balance between the calculation accuracy and the computational efficiency.The simulation results show that the accident reconstruction results can obtain with high accuracy,reliability.And it can meet accident reconstruction requirement under different vehicle speed and collision deformation.The study provides a new solution for vehicle large deformation.