Simulation Research On Moving-like Block Of Single-track Railway Based On Cellular Automata

At present,single track railway still occupies a large proportion in the overall railway transportation network in China.In China,the single track railway generally adopts the inter station block as the driving mode.At the same time,only one train is allowed to pass between the stations,which leads to the low passing capacity of the single line railway,which restricts the development of regional economy to a certain extent and gradually becomes the transportation bottleneck of the whole road network.Limited by natural environment,basic investment,construction technology and other factors,it is more difficult to expand the capacity of single line railway compared with the double line railway.Therefore,under the existing conditions,how to improve the transportation capacity of single track railway to the greatest extent and to alleviate the contradiction between supply and demand scientifically is a problem that needs to be studied in depth.This paper will analyze and study how to improve the single track railway,and the main research contents are as follows:(1)The technical scheme of Bi directional moving-like block driving of single track railway is designed.Firstly,based on the actual operation conditions of single track railway in China,the applicability of various domestic and foreign ways of single line railway expansion applied to China’s single line railway is analyzed comprehensively.It is found that the change of block system can shorten the tracking interval of the same direction train and improve the capacity of single track railway.It is a shortcut for the expansion of single line railway,and the expansion idea has the replicability and popularization in China;however After that,the feasibility and expected capacity expansion effect of all kinds of block systems are analyzed,and the moving-like block is determined to be the best expansion block type;finally,based on the analysis of the technical functions of single track railway in the process of single track Bi directional moving-like block operation,the single track railway under moving-like block is constructed in terms of accurate positioning of train and inspection of train integrity Technical scheme of road driving.(2)The cellular automata model of single track railway under moving-like block is constructed.Firstly,the operation principle of single track railway under moving-like block is analyzed.Then,based on the cellular automaton theory,the cellular automaton model of single line railway is constructed based on GUI interface setting,boundary condition setting,train section operation rule,train station operation rule,etc The running diagram of moving-like block train provides the basic model support for the subsequent research.(3)The driving characteristics of the single track railway under moving-like block system are studied.Based on the cellular automata model of Bi directional moving-like block of single track railway,the paper selects the Golmud Lhasa Section of Qinghai-Tibet Railway as the research object.Firstly,according to the relevant railway operation technical standards,the core parameters involved in the model are checked and calculated to get the train running spot map of the Golmud Lhasa Section(andor-Lhasa)of Qinghai-Tibet Railway under the Bi directional moving-like block,which is in accordance with the actual situation;then,the paper selects the non moving model The paper analyzes the changes of station utilization,passing capacity and train delay when the single track railway adopts moving-like block.Finally,the simulation results show that Bi directional moving-like block can be applied to domestic single track railway to realize the tracking operation of the train.The Bi directional moving-like block closure is adopted in the Golmud Lhasa Section of Qinghai-Tibet Railway.When the tracking interval is 7-8min,the average passing capacity can reach 26 pairs,theoretically,the line passing capacity can be increased by 44%,and the capacity expansion effect is obvious.Through the simulation analysis of the running characteristics of single track railway under the moving-like block,it is concluded that the Bi directional moving-like block driving of single track railway can greatly improve the flexibility of the line passing capacity and transportation organization,and scientifically alleviate the contradiction between supply and demand of single track railway.This is of positive significance to improve the efficiency of single track railway transportation management and to help the high-quality development of economy and society.