The Simulation Analysis Of Solving Collision Speed Based On The Vehicle Deformation

In recent years, with increasing the vehicle ownership in China and road trafficconditions become more complicated, vehicle safety accident frequency high, causingmore and more attention as the main reason to cause property damage and casualties.Due to traffic accidents diversity, complexity, instantaneous, making quite aheadache when the police investigators and auto insurance company determine theresponsibility for the accident, in which to correctly calculate the moment of thecollision speed of the accident, the most traditional method is mainly based onimprinted tire brake, the fallout, the vehicle stalls and the empirical formula, but thesefactors are likely to be artificially destroyed, the empirical formula has greatlimitations, and the vehicle deformation after the collision is an objective and difficultto change, so encounter greater difficulties in the use of the above, by measuring thevehicle deformation to solve the collision speed which have. important theoreticalsignificance and social value.On the basis of domestic and foreign automobile collision deformation AccidentReconstruction, combine the stiffness coefficient and collision deformation theory ofthe energy method, the energy gradient in the collision process, the establishment ofthe deformation energy grid mathematical model to solve the collision speed, andHyper Mesh software to establish a car-rigid wall collision simulation model, the useof LS-DYNA to solve the analysis and three-dimensional animated accidentreconstruction by Hyper View.deformation zone key points through the front part ofthe deformation characteristics of the key points in the simulation and actual accidentsdeformation characteristics to verify the correctness of the mathematical model. Afterseveral cars and the rigid wall100%frontal crash simulation test, combine withaccident reconstruction degree, the basis of this method to measure the deformation,and increasing accuracy. Finally, according to the conservation of momentum andenergy in the process of the accident vehicle collision, the energy grid in the car tosolve the collision speed the application of car collisions, and in the oblique collisiongreater flexibility, diversity than the public security industry standard.