Research And Implementation Of The Simulation System For Train Turn-back Capacity Of Urban Rail Transit

With the increase of urban population in China,the congestion problem of urban public transport is becoming increasingly serious.As a large volume of urban rail transit,subway can alleviate the pressure of urban public transportation.However,due to the rapid growth of passenger flow demand,the early construction of subway lines is not considered comprehensively in the initial design,the current operation capacity of the line has reached the bottleneck and is unable to adapt to the passenger flow demand at this stage.The line operation capacity includes the ability to pass through the main line and the ability to turn back,among which the turn-back capacity is the key of the line operation capacity.In line transformation,designers need to simulate these operational indicators according to specific operational requirements,so as to determine the optimal designing scheme.For this purpose,we independently researched and developed the "urban rail transit train operation simulation system"(hereinafter referred to as the simulation system),which can provide a simulation and verification platform for performance analysis in different application scenarios(main line,turn-back,metro depot).This thesis first describes the structure of the simulation system and the division of modules,analyzes the main functions of each module,and on this basis,the human-computer interaction layer of the simulation system and the application layer of the turn-back capacity application scenarios are described in detail.Then this thesis describes the calculation principle and analyzes method of turn-back capacity,and focuses on the process of station-front turn-back and station-end turn-back,and the main factors affecting turn-back capacity are analyzed qualitatively.After that,the design and implementation of the simulation system are described in detail,including the design of the function of human-computer interaction layer graphical display,the interface design between each module in the simulation system and the design and implementation of the application layer of the turn-back capacity application scenarios.This thesis analyzes the principle and structure of turn-back capacity module,mainly introduces the turn-back capacity analysis graphical report,which can be taken as reference to the actual line turn-back capacity optimization.Finally,this thesis takes the actual operation line as an example.Through the simulation system,the turn-back capacity of the station in the line is calculated quantitatively.With the help of the turn-back capacity analysis report,this thesis completes the quantitative verification of the factors affecting the turn-back capacity,and puts forward the corresponding optimization measures,from the view of aided design to optimize turn-back capacity analysis report of engineering practical value.