Research On Injury Mechanism And Accident Forms Of Cyclist In Car-Two-Wheeler Collision

In collisions between vehicles and two-wheelers,two-wheeler cyclists are vulnerable to injury as a vulnerable participant in traffic.Electric two-wheeler accidents account for the highest proportion of two-wheeler accidents.From 2014 to2018,the number of electric two-wheeled vehicle accidents and the number of casualties caused has increased year by year,and all sectors of the society have paid more attention to the traffic safety problems caused by electric two-wheeled vehicles.Therefore,it is very meaningful to carry out research on the accident form of electric two-wheeled vehicle and vehicle collision accident,analyze the law of the cause of the accident,and study the injury mechanism of cyclists in typical accident scenarios.It is very meaningful to protect the safety of electric two-wheeler cyclists.of.The study of accident patterns based on real accidents can provide reference suggestions for traffic control departments to revise traffic safety laws and regulations.It can also provide data support for the China Insurance Automobile Safety Index(CIASI),which aims to improve the design of vehicle safety systems.This thesis refers to the accident pattern classification method of the in-depth study of traffic accidents in Germany.After in-depth statistical analysis of the accident patterns of 85 cases of electric two-wheeled vehicles,the typical operating conditions are extracted and multi-level accident analysis is carried out.The pattern and characteristics of wheel vehicle accidents.In order to study the injury mechanism of the electric two-wheeler cyclist in a collision accident,the common head injury mechanism and damage evaluation index of the injured person in the collision accident are first introduced,and the process of reconstructing the four accident cases through the MADYMO software is emphasized.,And verify the reliability of the simulation model and the feasibility of the MADYMO accident reconstruction method through the accident process and data and model comparison.Using the reliable reconstruction model of multi-rigid body accidents,a multi-parameter simulation test was carried out with three common car models,initial collision speed,electric two-wheeler speed,collision position and collision angle.Based on the simulation test results,the synthetic acceleration of the dummy’s head center of mass and the dummy’s throwing distance were used to study the cyclist’s injury factors,and the following conclusions were drawn: when the two-wheeler speed is higher than 25km/h and the vehicle speed is higher than 42km/h When a two-wheeled vehicle has a frontal collision,the cyclist’s head is subject to damage that exceeds the human tolerance limit;when a two-wheeled vehicle has a frontal collision with a vehicle exceeding 50km/h at a speed of more than 12km/h,the cyclist’s head is subject to the tolerance limit.When a two-wheeled vehicle with a speed of more than 25km/h collides with a vehicle with a speed of more than 50km/h,the head injury of the rider exceeds the tolerance limit when the frontal collision angle exceeds 30 °;the speed of the two-wheeled vehicle and Sedan and Van When the vehicle speed of the two models is used as a variable,the correlation with the dummy’s throw distance is weak;when the vehicle collides with a two-wheeler,the cyclist’s throw distance is farther than that in a side collision.According to the comparison of the above test results and the relevant laws and regulations of countries around the world,three regulations and suggestions related to my country’s electric two-wheelers are put forward:(1)The speed limit of vehicles in the high-risk section of the accident is 40km/h;(2)The speed limit of electric two-wheelers is 25km/h;(3)Driving an electric two-wheeled vehicle higher than 25km/h must obtain a driving license.