The Analysis And Applied Research Of Traffic Accident Velocity Calculate Method

With the development of automobile industry and road transportation, the traffic accidents happen every day in the world and become a serious society problem.According to the statistic from police ministry, each kind of traffic accidents occurred in our country. The collision accidents occupied 57%.The personnel casualty which created by the collision accidents reached 70%. Regardless of the sum of accidents, the personnel casualty or the economic loss, they occupy above 2/3 of corresponding total, and become main shape of the modern road traffic accidents.In the course of responsibility confirmation for traffic accidents, velocity confirmation is a needful hereunder often, its function is a essential proof chain to form the accident process,also can assist handle cases mechanism offer evidence whether the driver is being irregularity things in control velocity. The calculation in velocity have a good many of calculate formula and software simulation correlative, so we should choose reasonable calculate means depended on the accident modality and information gather when calculating velocity.On the foundation of summarizing the predecessor studies, this paper deeply discusses the automobile collision theory. Using classics collision mechanics method and combining the characteristic of collision accident. Some practical and feasibility formulas which calculate the velocity of accident vehicles are proposed. Then dissect use scope of each formula and the influence factors of involved the parameters. Aim at the accidents which actually occurred, analyzing the uncertain of the essential parameters needed by the calculation of collision velocity, such as road surface trace, coefficient of adhesion, automobile body distortion and so on.Aim at the accident analyses and judge in the course of the accident reappearanc,using"Traffic Accident Analyses And Reappearance System" developed by Chang an University to studying and analyzing all kinds of tache in the traffic accident analysis. At the same time ,bring forward some necessary information affecting the result greatly and made up the practical scene reconnaissance register charting, can satisfy velocity calculation and the need of accident reappearance and analysis.This paper depends on the plenty experience resources of the Sichuan Xihua Institute of Automobile Vehicle Justice Identification and "Traffic Accident Analyses And Reappearance System" ,introduces several examples of typical traffic accidents occurred in highway, demonstrate in the computation process how to select appropriate formula as well as how to make certain the parameter according to the different characteristic of every accident, discuss the way how to get mostly parameter and the influence of some parameters, and apply different velocity compute method integrately,and validate with its final result.