Resilient Evaluation And Optimization Of Urban Rail Transit Transfer Station Based On Simulation

The scale of rail transit network in major cities is constantly expanding,and the passenger travel demand is increasing day by day.Under the dual requirements of network operation safety and high-efficient operation,it has become a top priority to ensure the safety,convenience,and efficiency of transfer stations,which are the core nodes of the network.However,in practice,transfer stations are often faced with many unforeseen disturbances or even disasters,which seriously threaten the daily travel of urban residents.How to evaluate and optimize the performance of the transfer station system under normal conditions and various emergency situations better is the key problem to be solved in this paper.Based on simulation,data fitting and other technical means,this paper establishes a resilient evaluation index system for urban-rail-transit transfer stations and a bottleneck point resilient optimization model.The main work includes:(1)The research foundation of resilient urban-rail-transit transfer station system is established.In this paper,after summarizing the relevant theoretical research,three basic connotations of the resilience of urban-rail-transit transfer stations are presented,namely,reliability,restoration,and evacuation ability,which lays a theoretical foundation.This paper analyzes the resilience elements in the system and provides data support.On the one hand,it uses the probability distribution function to fit the service time data of those facilities with obvious service desk;On the other hand,it summarizes the calculation method of the key parameters of other facilities.(2)A resilient evaluation index system suitable for urban-rail-transit transfer station system is proposed.Using the perspective of "resilience",the dynamic simulation models of daily scene,disturbance scene and catastrophe scene are constructed respectively,in order to obtain the secondary indexes under three different dimensions of reliability,restoration,and evacuation ability in the resilient evaluation index system.Then,this paper uses the three-scale AHP fuzzy evaluation method to quantitatively evaluate the resilience level of transfer station system.(3)A bottleneck point resilient optimization model for island-side node transfer stations is established.The key parameters of bottleneck facilities are taken as the decision variables,while the resilience level of station system is taken as the optimization objective,and the feasible range of bottleneck facilities on each platform is taken as the constraint condition.Based on the means of multivariate polynomial fitting and linear calculation,this paper solves the quantitative relationship between the station resilience and the key parameters of the bottleneck facilities,and the resilient optimization scheme of the transfer station system.(4)Taking Guangjinanlu Station,a typical island-side double-line node transfer station in Suzhou Metro,as an example.The resilient indexes in several simulation scenarios are obtained and calculated,then the resilience level of the station system is evaluated,and the rationality of the resilient evaluation index system is verified.The functional equation of station resilience changing with the position of transfer stair and escalator group is obtained by fitting.On this basis,the effectiveness of model is verified by inserting the equation into the resilience optimization model for bottleneck point.From the perspective of resilience,this paper deeply studies the evaluation of urbanrail-transit transfer station and the optimization of passenger flow bottleneck points,which can be used as a theoretical reference in related research fields.At the same time,it also provides guidance for the design,operation,and decision-making stage of the station.There are 58 figures,50 tables,and 65 references.