| Due to its convenience and large traffic volume,China’s rail transit has become the preferred mode of transportation.However,with the increase of operating lines and passenger traffic,China’s rail transit is facing many problems.Rail transit vehicle system,as an important subsystem with the highest frequency of operation accidents and direct impact on passengers,has become a key link in the safety of rail transit operations.This paper analyzes and comprehensively evaluates the rail transit vehicle system equipment in China.On the basis of statistical analysis of domestic and international rail transit operation accidents,it constructs rail transit by using the relevant principles of system dynamics through expert evaluation,site investigation and questionnaire survey.The vehicle system dynamics simulation model is based on the cloud evidence theory,at the same time,combined with the simulation results in order to establish a comprehensive evaluation cloud model of the rail transit vehicle system.The model is applied and the vehicle system of Dalian Metro Line 1 is taken as an example to predict the safety status.The safety management objectives are proposed and the safety of vehicle system equipment is analyzed and evaluated.The main work and research results are as follows:(1)Analyze the statistical data of rail transit operation accidents at home and abroad,identify the main influencing factors of rail transit vehicle systems,and provide reference for constructing standard systems.(2)According to the SMART principle,such as the questionnaire system,on-site investigation,expert review are used to construct the safety standard index system of the rail transit vehicle system,and the weights and ranking of each index are obtained.(3)According to the principle and method of applying the system dynamics of each index weight,the system dynamics model of the rail transit vehicle system is constructed,and the main subsystems affecting the vehicle system are obtained through simulation,and the indicators are improved.(4)Based on the analysis results of the vehicle system dynamics model,the trend of the safety status of Dalian Metro Line 1 is predicted,and the safety management objectives are proposed.(5)Construct a comprehensive evaluation cloud model of rail transit vehicle system,and take Dalian Metro Line 1 as an example to evaluate the safety status of rail transit vehicles,and propose targeted countermeasures based on the evaluation results. |
