Development For Subway Train Operation Simulation Platform Based On Multiple Trains’ Tracing

Nowadays,subways are developing rapidly.Metropolitan cities with more than a million people in developed countries mostly chose subway to ease traffic congestion.With the rapid development of China’s society,economy,and acceleration of urbanization,the number of urban population has increased dramatically,and traffic congestion appeared in most cities.Construction of subways can improve urban traffic environment,and already has played an important role which cannot be ignored.This paper firstly designed a physical model of single train,based on train traction calculation theory.Secondly,this paper designed a trains’ group tracing model based on movable block train control system,this model takes both the adaptive control method for distances between trains and the transition process of full-day train operation plan in peak and flat periods into consideration.Moreover,trains’ emergency treatment model was designed based on one subway operation emergency response plan.Based on models above,with object oriented programming,the train operation plan simulation platform was implemented.Finally,based on Arc GIS API for Java Script,multiple trains’ tracing running3 D scene was built,this scene shows each train’s real time running status,such as distance,speed,location,etc.Moreover,trains’ operation record analysing utility class and trains’ operation trail drawing utility class were implemented.The record analysing utility class is able to calculate trains’ operation technical parameters such as operation duration,tracing interval,etc during a period of time.And the trail drawing utility class is able to draw all trans’ s operation trail in a given period of time for reference.Simulation result of Qingdao metro line 8 showed that this simulation implements a normal/abnormal full-day train operation plan which satisfies the demand of passenger flow distribution and train operation management,and can compute various key parameters such as single train travel speed,quantity of train set,trains’ tracing interval,etc.This simulation showed a high application value.