Research On Optimization Of Railway Network Maintenance Time Window Scheme Based On Station And Line Capacity

With the continuous development of China’s railway lines and the continuous improvement of the railway network,people’s travel time requirements are more and more diversified.All of these make us have more and more strict requirements on the transportation organization and reasonable operation time of trains running on high-speed railway.Reasonable setting of travel time and scientific organization of transportation work are not only conducive to improve the travel efficiency of passengers,but also improve the profit of railway enterprises.The maintenance time window setting of high-speed network has a great influence on the reasonable operation time range of high-speed trains,especially on the reasonable operation time range of“sunset-depature and sunrise arrive train(SST)”cross line high-speed trains.The operation of cross line trains,high-speed trains and common speed trains under the network have the problem of mutual influence,and the line capacity and station capacity should also be considered,How to reasonably set the maintenance time window to optimize the train operation will not only affect the profitability of the railway in the current fierce transport competition,but also have a certain impact on passenger service satisfaction.On the premise of analyzing the coordination between skylight setting and line capacity,this paper uses the existing maintenance time window setting experience for reference,and makes further research and discussion on the operation of SST and the maintenance time window setting.Through the analysis of the maintenance time window setting characteristics and the differences of different operation modes of SST,the skylight in the road network is limited and constrained,so that the operation time and quantity of SST are further optimized.In this paper,the theory and method of coordinated optimization of train operation and maintenance time window setting under the conditions of interval operation time,train stop time,station arrival departure line capacity and maintenance time window setting time are established,and the optimization model is established,The feasibility of the proposed method is verified by the analysis of the trains running on the Beijing to Guangzhou railway.This paper is divided into the following parts:(1)This paper analyzes the characteristics of various maintenance time window setting forms,and introduces and analyzes the operation time and requirements of comprehensive maintenance time window.(2)This paper analyzes the influencing factors of comprehensive maintenance time window under the condition of road network,and analyzes the characteristics of SST under different operation modes.(3)A coordinated optimization model of SST operation and maintenance time window setting is established under the condition of simple railway network,and decision variables are introduced to describe different train operation modes.(4)An example is introduced to optimize the coordination between maintenance time window setting and train operation,which proves that the proposed method is feasible and effective.Finally,the conclusion of the paper is drawn,and the imperfect part of the paper is further prospected.