Study On The Optimization Of The Operation Diagram Of Periodic Train On Cheng-yu High-speed Railway

Train graph is the base of Railway Transportation Operation, whose core is the graphing of train graph. Periodic train graph is an advanced mode of train graph, and it could demonstarte the advantages including convenience, high efficiency and punctuality of high speed railway. As an important part of Shanghai-Chengdu High Speed Railway, the periodic train operation of Chengdu-Chongqing High Speed Railway is of great significance for its key function in Chengdu-Chongqing economic region's comprehensive tranportation network, as well as building up the one-hour rapid transit circle between Chengdu and Chongqing.This paper primarily does research on the periodic tranportation operation mode of high speed railway, discussing the advantages of using periodic operation. Then it introduces relative theory, characteristics and process of authorizing periodic high speed train graph based on its feasibility. It summarizes several key points of research including period length ensurance, motor unit ensurance, line drawing of different stop schedule plans, period joint,line extraction and adjustment of motor unit. On the base of this, the paper especially does research on some technologies including period span management, arrival-departure sequence confirmation,initial stationing of lines and the line-conflict dispelling. It also analyzes the computer-based train graphing technology. Finally, this paper does the instance on Chengdu-Chongqing High Speed Railway, analyzing and assuring its feasibility of adopting periodic transportation operation, showing its graphing process, as well as drawing the periodic train graph of Chengdu-Chongqing High Speed Railway,which could satisfy the current demand of passenger flow.