| With the expansion of the urban area,the service scope of urban rail transit has gradually become larger,passenger travel demand has become more dispersed,and Y-type lines have emerged.How to optimize the Y-line traffic plan to better meet the travel needs of the main and branch passengers,reduce the travel time of the main and branch passengers,optimize the section full load rate,and save the operating costs of enterprises are the focus of this paper.This paper mainly study the following work:1、This paper analyses the development and characteristics of Y-type rail transit lines,introduces several basic modes of Y-type rail transit lines,and analyses the factors affecting Y-type rail transit lines.It is concluded that the passenger flow distribution characteristics and line operating conditions have a relatively large impact on the train routing of Y-type line,which should be focused on in the study.2、With the objective of minimizing passenger travel time and enterprise operation cost,and with the constraints of maximum full load rate,minimum tracking interval,return interval,minimum departure frequency and number of vehicles,the optimization model of train routing is constructed,and the optimization effect of the model is evaluated by operation index.3、Taking the early peak hour passenger flow of type Y line A in S city as an example,three optimal schemes under different passenger travel time weights are obtained by using the established optimization model of train routing scheme.It is concluded that for the early peak passenger flow of Line A,when the weight changes from 0 to 1,the running kilometers of the corresponding optimal train operation plan increase continuously.The waiting time of main line passengers increases first and then decreases.The values of other evaluation indexes such as passenger travel time,passenger waiting time,passenger transfer time and average full-load rate of the whole line are gradually decreasing,which verifies the validity of the model.4、By comparing the optimal train routing scheme with the branch line independent operation scheme,it is concluded that the indexes of the optimal train routing scheme,such as train running kilometers,passenger waiting time,passenger transfer time and average full load rate,have been obviously optimized,and the optimization effect is better.5、By comparing the optimal train routing scheme with the full through branch line operation scheme,it is concluded that the train running kilometers and passenger waiting time of the optimal train routing scheme obtained in this paper have been optimized to a certain extent.Therefore,when the operation enterprises adopt the direct branch line operation scheme,they should consider the characteristics of passenger flow and other factors comprehensively to determine the reasonable routes return location.When the passenger flow of the branch line mostly goes to the main line,the direct operation of the branch line is better than the full direct operation in some aspects.Figs 37,tables 23,references 60. |
