Research On Train Operation Scheme Of Intercity Railway Network

With the gradual formation of various urban agglomerations in China,the integrated development of politics and economy makes the links between cities and towns within the urban agglomeration closer.At the same time,a large number of intercity passenger flows were generated and driven.Intercity passenger travel requires efficient and convenient public transportation,so the intercity railway trains have taken on this difficult transportation task.The formulation of the intercity railway train operation scheme is a large-scale solution process involving many factors and complicated processes.In this paper,the main research content is the method of formulating intercity railway train operation scheme,and the main research goal is to obtain a reasonable train operation scheme.The following work has been carried out.Establish the theoretical basis of the train operation scheme of the intercity railway.The intercity railway network,characteristics,influencing factors and design contents of train operation scheme are analyzed,and the key issues to be determined are: the choice of types and operating speeds of the train,the selection of cross-line trains,the coordination of train travel speeds and stop plans,and the coordination of passenger demand and transportation capacity supply.Study on the line group division and passenger flow allocation adjustment based on the complex intercity railway line network.Establish the passenger transport mode,innovatively divided the intercity railway line network into several line groups with large internal passenger flow exchanges.Organize local line and cross-line trains that match the design speed of the line to operate within the line group in a variety of routes and stops,and organize passengers across the line group and passengers who cannot reach directly in the line group to transfer at the intermediate station.The Logit model is used for passenger flow distribution,and an OD flow adjustment method is designed to realize the conversion of transfer passenger flow to the direct passenger flow within the line group.Determine the train operation scheme within the line group.With the objective of minimizing the time cost of passenger travel and maximizing the operating efficiency of railway enterprises,comprehensive consideration is given to the constraints of passenger flow requirements,capacity constraints of stations and sections,and so on,a dual-objective non-linear programming model was established.The simulated annealing algorithm is designed in accordance with the characteristics of the train operation,and the efficient solution of the intercity railway train operation scheme is realized.Take the intercity railway network of Chengdu-Chongqing city group as a case.Divide the intercity railway network into four line groups and adjust the OD flow.Using the train operation scheme model and algorithm constructed in this paper,it can be obtained that it is necessary to arrange 319 pairs of intercity trains for daily intercity passenger transportation tasks in the near future.This train operation scheme guarantees the low time cost of intercity passenger travel and the high profit of the railway enterprise,which verifies the feasibility and rationality of the method for formulating intercity railway train operation scheme in this study.