Simulation On The Model Of Debris In Traffic Accident

Along with the development of society and civilization, automobile in human social life is playing an increasing important role. But along with the development of transportion, the global rate of traffic accidents has also on the upward trend. Road safety has become a concern to the countries in the world. Many countries have sustainable development in traffic safety will be top priority. Compared with other countries in the world, traffic accidents in China are more serious in the world. The grim reality, people have to pay more attention to traffic safety situation, and make continuous progress in the application of science and technology road safety research to make vehicle benefit of humankind better. At present, all countries take countermeasures in varying degrees from the road and traffic engineering.Automobile accident analysis is the study on the cause of similar injury and loss in the accident. Analysis must take use of the overall incident analyzed to realize the accident reocrred. The task of analysis is to make further scientific explanation of the causes of accidents,to clarify the whole process of movement,to make clear the accident parties who should take the responsibility,to get experience and lessons in the accident,to analyze the necessary measures of reducing consequences of the accident by using the collected information,materials and data.Accident Reconstruction is the course of making the inference process by the condition of vehicles damaged, stop state Staff injuried and various forms based on the traces of reference of the parties and witnesses statements on the scene of the accident. The key of Accident Reconstruction Analysis is to find and collect the evidence on the scene of the accident and to make a scientific and rational explanation. Therefore, exploring the mechanism of the accident,simulating the accident process, making accident reconstruction analysis informationleft in the accident and make research on road safety have important practical significance.The Accident Reconstruction information Left the scene of traffic accidents is the important evidence and key factor. Traces of traffic accidents left in a traffic accident scene or taken away from the crash site to prove the truth of traffic accidents Articles, and traces of substances, including that the vehicle, the human body, the scene roads, fixation, fouling, falls and various signs. Traces in traffic accidents, falls are common accident scene one of the important exhibits. The fallout is behind the crash site, to prove the truth of the accident or material goods. Falls typically include damage from the vehicle parts and broken glass, paint debris, rubber debris of broken vehicles were loaded, structural fragments of earth and sand, in the human body thrown on the ground wearing goods and belongings, the human being isolated organs, Other objects from the collision, obliterating fell on the ground bark, colonization, cement and stone fragments, and so on. In this paper, an abstract for the general pedestrian fell enriched falls definition content.At present, the study on the the debris included throwing objects kinematics and dynamics analysis, pedestrian collisions and statistics-based distribution Experimental studies. With the rapid development of automotive technology, early studies demonstrated some inevitable limitations. Accidents complex factors, it is necessary for the accident falling in-depth and systematic research.Vehicle/ pedestrian collisions are common type of accident, the auther create a virtual model of the collision, Simulation of vehicle / pedestrian collisions by PC-Crash. According to pedestrians and vehicles after the collision characteristics of the track will be divided into pedestrian collisions forward projectile model Winding projection model, and an integrated model for high-speed collision brake model. Simulation test vehicle selection is more typical models, mannequins collision choice PC-Crash the adult dummies in multi-body system dynamics theory and related contact theory on the basis of simulation experiments Test parameters attention to the selection and real accident environments consistent. The simulation results of the corresponding forward projectiles, such as throwing projectiles winding from the formula. Pedestrians will be simplified as particle and rigid body kinematics according to the theory of vehicle / pedestrian collisions mathematical model According to the simulation results and the model.This paper will be make same model currently used for accident analysis of the classic model for analysis and comparison test by comparing the mathematical models and empirical model analysis on the advantages and disadvantages of Analysis of the factors. Comparison front of mathematical models and empirical model (including this paper, the model) had very good consistency, Despite the mathematical model in projectile kinetic theory to consider the details of the more detailed, However, if its application to solve practical problems often need to introduce amendments experience factor. Model influence the results of the biggest factor is the choice of specific parameters such as the friction coefficient projectiles efficiency, Therefore, when using mathematical models to resolve the problems of appropriate and correct choice correction factor is very important.The experical model's major advantage is easy to apply in the actual collision accident relatively; drawback is that users must pay attention to this model of the scope and conditions of use. In addition, when the actual conditions of collisions with the experience and background model assumed the same or similar conditions, experience in the use of the formula can usually get accurate result, You need empirical model in detail and appropriate consideration of the various factors. Early empirical model calculation speed higher than the existing formula for the calculation speed, Note vehicles with geometric evolving empirical formula also need to constantly revised and improved. Mathematical models and empirical model as a reasonable use of the time can get a higher accuracy of the results; experience model has the advantage of more easily applied to the reality of crashes analysis, especially when the collision of the average classical or similar parameters; When environmental parameters collision with average or greater difference in the classical parameters, Mathematical models can provide experience than the model more accurate results.For contact, the auother make the throwing objects on the campaign contact the simulation tests by ADAMS and establish the movement simulation model applicable for ADAMS. Analysis of throwing objects campaign process, including different initial velocity, throwing objects for different shapes in the process dished out the trajectory change and its effects; Simulation analysis of the static and dynamic friction coefficient of friction structural parameters ball touch the ground in the process of being rebound coefficient.cut to rebound coefficient rebound parameters of the trend, and given the corresponding image and explored the fallout in the process of collision contact with the underlying mechanism of movement.