Research On Motion Trajectory Of Vehical Collision Accidents In A Plane Intersection

The development of automobile industry has not only made great changes in people’s life and production way,but also affected the social transformation.Meanwhile,it also led to a large number of road traffic accidents.According to the World Health Organization statistics,1.25 million people die every year because of road traffic injuries,and 20 million to 50 million people suffer non-fatal injuries due to road traffic crashes.In China,taking 2016 as an example,there were 8643 thousand road accidents,an increase of 659 thousand in year-on-year,an increase of 16.5%.Among them,212,846 casualties were involved,63,093 people died,226,430 were injured,and the direct economic loss was 1.21 billion.The death rate was 2.14 of every ten thousand cars for road traffic accidents,an increase of 2.9% in year-on-year.As a common accident form,the research on crash track of automobile at level crossing has important theoretical significance and practical value for the identification of accident responsibility and micro analysis of crash accidents.The author defined the concept of car crash accident,research type,track,crash touch point at level crossing and explained the main research methods in the meantime.On this basis,according to the different characteristics of car crash accidents at level crossing,and on the basis of previous studies,the author analyzed the mechanics of the accident cars and discussed the mechanical characteristics of the automobile accident at level crossing.Meanwhile,the author studied the dynamic model of the right angle side crash(located in the front,middle and back of the crash car’s side)between cars at level crossing.On the basis of the basic theory of crash accident at level crossing,the author used a large number of real case data,and PC – Crash(a simulation software)to test the trend of the car’s track after crash with different parts(the front,middle and back)of the car in different forms(moving cars crash into stationary cars,and moving cars crash into moving cars with the same speed)and different speeds at level crossing,and discussed and analyzed respectively.At the same time,the author used PC-Crash to carry out the optimization of simulation parameters,to prove the real cases of car crash at level crossing.Finally,the author compared the results of the PC-Crash and the real cases and discussed the results.The test results is consistent with the real cases of car crash process,prove that the research of car crash track is a reference to infer the accident crash form and speed at level crossing.