Train Operation Adjustment Of High-Speed Railway Under The Failure Of Section Carrying Capacity

High-speed railway trains are more and more popular because of their high safety,high speed and high comfort.Under normal circumstances,high-speed railway trains operate at the time specified in the planned train diagram.However,in daily operation,the high-speed railway will inevitably be affected by various interference factors inside and outside the system,causing trains to deviate from the planned train diagram.If adjustment measures are not taken in time,it may cause a large area of delay of subsequent trains,and even lead to the temporary shutdown of some trains,resulting in great losses to passenger travel and high-speed railway operation.This thesis studies the train operation adjustment problem of high-speed railway under the partial failure of section carrying capacity for a period of time from the following aspects:Firstly,on the basis of reviewing the existing research,this paper introduces the common interference sources affecting the normal operation of high-speed railway trains,divides the interference into mild interference,moderate interference and severe interference according to the severity of interference,and summarizes the corresponding manifestations and adjustment methods of each interference type.Secondly,it describes the constituent elements and formal representation of high-speed railway train diagram,and constructs a high-speed railway train operation adjustment model based on the macro level,which takes the minimum total arrival delay time of train at all stations as the goal and the constraints of section operation and arrival departure line as the constraints,etc.The absolute priority of train,the punctuality of train,the operation margin of train section and the parking margin of train station are selected as the indicators to describe the train operation state.The k-means algorithm is used to divide the relative priority of delayed trains.Later,this priority will be used to construct the fitness function of genetic algorithm and judge whether the station overtaking is reasonable.Then,Based on the characteristics of different traffic organization modes adopted by the sections affected by interference within the duration of interference and after interference elimination,Genetic algorithm is used to solve the model in two stages.In the first stage,the up and down trains arriving at the fault section within the fault time are adjusted,and in the second stage,all remaining trains are adjusted respectively according to their directions.According to the problem studied in this thesis,the key points in the process of genetic operation are designed,and the detailed solution steps of the problem are given.Finally,taking the transportation organization of Zhengzhou-Xian high-speed railway as the background,the calculation example is constructed.By setting different interference scenarios and carrying out simulation calculation based on MATLAB2016,the high-speed railway train operation adjustment strategies under different interference scenarios are obtained,and the corresponding adjusted train operation schedule is output.The results show that the model and the two-stage solution are feasible.In the process of train operation adjustment,genetic algorithm can effectively allocate railway resources and adjust the delayed train by changing the occupation order of train section,compressing the operation time of train section and station parking time,so as to make the train resume on schedule as soon as possible.