Research On Urban Rail Transit Station Loading Capacity And Passenger Flow Control

With the rapid development of China’s economy and the acceleration of urbanization,the demand for passenger travel has increased,leading to the intensification of the contradiction between passenger travel demand and transport infrastructure supply,and the vigorous development of urban rail transport is an important measure to alleviate urban congestion.As an important node in the urban rail network,the station has many important responsibilities,however,the contradiction between the service capacity of the station and the passenger demand is particularly prominent at present.Therefore,in order to alleviate the many problems existing in urban rail transit stations,this paper starts from providing a reasonable mathematical assessment means for station loading capacity and a reasonable basis for station passenger flow control scheme,studies the definition and classification of station loading capacity,proposes a calculation method for calculating station system loading capacity,and constructs a station passenger flow control model based on flow lines.An example analysis based on Jiashan Road Station is carried out,and the work mainly consists of the following.(1)The existing research and application of loading capacity in the field of transportation is studied and summarized.The loading capacity of urban rail transit stations is further subdivided into station basic loading capacity and station system loading capacity,and its main influencing factors are analyzed and collated.The former does not fluctuate depending on the number of passengers in the station and the time of day,and is the maximum passenger loading capacity of a station as determined by the physical equipment and facilities,station buildings and line operating parameters.The latter,on the other hand,is a time-dependent dynamic loading capacity that includes passengers who have not yet completed station services and those who have completed services but have not yet left the station,and is subject to a combination of influences both inside and outside the station system.The two are interlinked and mutually limiting,reflecting both the good or bad operation and co-ordination of equipment and facilities within the station,and the quality of the overall operational management of the station system.(2)In view of the mismatch between the designed loading capacity of stations and the actual passenger flow,the passenger service event chain in urban rail stations,which can reflect the coupling relationship between different types of equipment or facilities and various passenger flows,is analyzed and a station equipment association network is constructed.On this basis,a method for calculating the loading capacity of the station system is designed,and an algorithm is proposed to apply the Frank-Wolfe algorithm for station passenger flow distribution and introduce a node attack strategy for complex networks to simulate the actual operation of stations when encountering large passenger flows and to reduce the difficulty of calculation.And the algorithm is implemented using Python language programming.(3)To alleviate the problem of over-congestion of passenger flow at stations during peak periods,the passenger flow control problem of urban rail transit stations is analyzed.Drawing on the idea of station passenger flow control based on flow lines,a linear programming model for station passenger flow control is proposed with the objective of maximizing the passenger flow through selected passenger flow control nodes per unit time,and constraints such as station system loading capacity,passenger flow demand,control node capacity,station platform capacity and other equipment and facility capacity are considered,and finally the Python language is used to write the genetic algorithm program for solving the model.(4)Using the calculation method and model proposed in this paper,a case study was carried out using the Jiashan Road Station of the Shanghai Metro as an example.Based on the information and data obtained through the on-site survey,the station system loading capacity of Jiashan Road Station was calculated under certain service levels using the station system loading capacity calculation method,and the passenger flow situation of Jiashan Road Station during the morning peak hours was modelled and calculated based on the flow-based station flow control model.The results show that the theoretical and practical solutions proposed in this paper have been applied to the passenger flow control at Jiashan Road Station.The results show that the theory and method proposed in this paper can provide a reference basis for the daily work and operation management of urban rail transit stations.