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Automobile accidents as the major cause property damage and casualties caused more and more attention. Especially in China, despite the lower car ownership, but the high number of traffic accidents. As traffic diversity, complexity and instantaneous hand count method for quantitative analysis of the accident its accuracy is very low. With the development of computer technology, numerical analysis method to car collisions reproduction scientific theory. Vehicle Crash Reconstruction technology is based on all the traces left behind by the accident scene, the use of knowledge of the theoretical mechanics, re-description of the accident has occurred, simulation and a repeat of the accident, aims to understand the vehicle before the collision behavior, and the whole process, in order to reasonably determine the attribution of responsibility for the accident. Accident Reconstruction technology in the accurate and rapid identification and fairly deal with road traffic accidents, efficient file management of road traffic accidents, as well as during the visual image of Road Traffic teaching and road traffic safety education has a very important practical significance. With the development of computer technology, especially the development of virtual technology, there has been a lot of physical engine development kit, such as ODE, Havok, Vortex, Newton and other. These engines will be packaged classical mechanics, kinematics algorithm and the use of some very sophisticated algorithms to be optimized to achieve, built-in collision detection system for virtual object dynamics simulation provides a lot of convenience. Accident reproduction based on physical engine simulation technology on the basis of previous studies, the specific work as follows: common accident reproduction mathematical model of the method of analysis, the main the CRASH model and SMAC model analysis, and its realization, verified the CRASH model can greatly reduce the estimated range of the initial speed before the accident, and the the SMAC model can be a good simulation of position information of the car to stop after the accident. Using the ODE physical simulation of the accident process, in order to improve the accuracy of the simulation, the simulation algorithm optimization, use simplified Gim model simulation of the tire - ground force, Integral Solution to optimize the use of improved European Rafah integral operation. ODE-based accident reproduction method, reproduction method based on the the SNAC model of accident as well as the actual incidents measurement data error analysis of the test results to verify the feasibility of using the method based on the the ODE accident reproduction. This article the work and research, and test results analysis, provides a good reference for follow-up based on physical engine, accident reproduction analog, and provide the scientific basis for the actual accident analysis.
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