Vehicle-Human Collision Accident Reconstruction And Numerical Simulation Analysis

Along with our country automobile industry and the transportation shipping industry fast development, China's automobile tenure volume will continue to increase, the vehicle greatly increase the convenience for people to travel, but has also led to an increase in traffic accidents. At present road traffic accidents has become one of the most serious social hazards which the whole world faces together. In road traffic accidents, the vehicle-human collision is one of main accident patterns. The rate of deaths and injuries in vehicle-human collision usually are often very high, so the vehicle-human collision are attracting increasing attention.In order to protect the safety of pedestrians, people must carry on the careful investigation and the science analysis to the traffic accident. Accident reconstruction as an important tool for identification of accidents, and the vehicle-human collision reconstruction has aroused more and more attention. Based on computer simulation of the vehicle-human collision reconstruction with low cost, high accuracy, objectivity and the advantages of rich contents, can provide scientific basis for the accident identification, the auto safety design and the research of damage biology mechanics.So the vehicle-human collision reconstruction has important social value and significance.In this paper, for the purpose of improving the passive safety of pedestrians, based on the multi-body dynamics, through the use of MADYMO to build the reconstruction models, the vehicle-human collision reconstruction research has been carried out in the two situations, which are vehicle-pedestrian collision and vehicle-bicycle collision.The study is based on large number of actual cases of traffic accidents.First establishe vehicle models faced to real accident cases, then with the Information of vehicle-human body stopping position, obstacle and body deformation, skidmarks and other information of the accident carry on the numerical simulation and reconstruction of the accident cases.Through the comparation of numerical simulation results of bodily injury and forensic report to confirm the validity of this method to the vehicle-human collision reconstruction.Sedan is the long vehicle representative, and bus is the flat head vehicle representative, human injuries in these two types vehicle-human collision accident also respectively has different characteristics, therefore the study of these two types vehicle-human collision accident has positive and practical significance. In this paper, on the basis of two kinds multi-rigid models validated by real accident cases, a series of simulation collision tests are carried out. The simulation uses the batch experiment the method, with different forms, different speed and in different directions, basically coveres various circumstances. Through the analysis of simulation results, discuss the throwing distance, forehead maximum acceleration and biggest calf stress.These regular information can provide the theory basis and the value reference for the traffic accident responsibility appraisal.