Adaptability Evaluation Of Complicated Transfer Station Capacity Based On Simulation And Fuzzy Comprehensive Evaluation Method

With the rapid development of rail transit network,transfer stations gradually occupy a higher proportion in urban rail transit stations.As an important node in the network,the operation quality of the transfer station and the adaptability of its distribution capacity and passenger flow will affect the operation efficiency of the rail transit network.At the same time,in order to avoid the high cost of the reconstruction project after the subway operation,it is necessary to make a systematic and comprehensive evaluation of the overall service level of the transfer station in the preliminary design stage.In this paper,the influencing factors of urban rail transit transfer station are analyzed,and the design principles of transfer station are introduced.This paper focuses on the study of station transfer modes,discusses the advantages and disadvantages of various transfer modes and their applicable situations,and analyzes the composition and functions of basic facilities of transfer stations.Secondly,according to the characteristics of urban rail transit stations,a Fuzzy Comprehensive Evaluation Index system for the adaptability of Transfer Station capacity is established,nine factors,such as transfer time,transfer distance,facility capacity utilization ratio and bottleneck congestion,are selected as the evaluation indexes of Capacity Adaptability,and the information of each index is analyzed and quantified.In order to improve the objectivity and reliability of the evaluation results,this paper introduces the membership degree calculation method based on generalized weighted distance and the combination weighting method based on Nonlinear programming,respectively,on the basis of the traditional fuzzy evaluation theory,it lays a theoretical foundation for solving the adaptability evaluation model of transfer station capacity.The complex transfer station simulation model is established by using the System dynamics software Anylogic.Firstly,the 3D building environment is established based on the design and construction plan,and the passenger flow data is calibrated by referring to relevant design specifications and field investigation,the parameters of pedestrian,facility and train are then set up in the model,and the logical flow is constructed for the three parts of passenger flow in the station: inbound passenger flow,outbound passenger flow and transfer passenger flow,respectively,and for the trains in the track area,based on the built-in module of the software,the interaction between the pedestrian and the train is realized by using the code,which makes the simulation process closer to the actual station operation scene.Finally,taking the transfer station on Chengdu Metro Line 13 as the research object,the dynamic simulation analysis is carried out according to the classification of station types,and based on the simulation output data,combined with the Fuzzy Comprehensive Evaluation Index system,the adaptability of the station hall,station platform and its facilities and equipment to the long-term peak passenger flow is evaluated,for the three-line transfer station Sichuan Shida station and the two-line“T”transfer station Dongpo station with poor evaluation grade,according to the problems highlighted in the simulation visualization image and the output evaluation index,this paper puts forward the corresponding optimization technical suggestions,then the validity of the optimization scheme is verified by simulation,which provides decision support and technical reference for the initial design and operation of urban rail transit transfer station.