Research On The Emergency Evacuation Method Of Urban Rail Transit Passenger Flow Under The Condition Of Network Construction

With the development of science and technology,transportation takes the lead,and urban rail transit,as the main artery of urban transportation,carries a huge amount of passenger flow every day.As a relatively closed,complex and crowded system,the operation failure of rail transit station is caused by emergencies,which not only causes the operation interruption,but also causes the temporary operation interruption of related stations and lines,and increases the passenger flow delay,In serious cases,it will endanger the personal safety of passengers and the overall operation of rail transit network.Therefore,it is necessary to fully understand the whole process of rail transit station failure caused by emergencies in urban rail transit system,and deeply analyze the propagation law of the stranded passenger flow in the network.Furthermore,it puts forward scientific and reasonable passenger evacuation strategies and methods,which can provide theoretical support and practical solutions for the emergency disposal of station operation interruption caused by rail transit system emergencies.Based on the complex network theory,this paper constructs a multi-mode distribution network composed of urban rail transit network,conventional public transport network and taxi operation network,and quantitatively analyzes the propagation and diffusion law of stranded passenger flow on the distribution network through cascading failure theory and random utility theory,Finally,combined with the passenger flow propagation law in the distribution network,an emergency bus dispatching connection model is established with the goal of the lowest operation cost and the highest passenger travel benefit,so as to effectively evacuate the stranded passenger flow from the fault station to the network.The main research work is as followsPublic transport multi-mode distribution network construction.Based on the complex network theory,the complexity and adaptability of multi-mode distribution network are analyzed,and then the multi-mode distribution network model is introduced.The multi-mode distribution geographic network is constructed by Spacal method;Spacep method constructs multi-mode distribution network,and designs relevant data information crawling method,which lays a theoretical foundation for the quantitative analysis of the propagation and diffusion law of the stranded passenger flow in the distribution network.Analysis of passenger flow propagation law in multi-mode distribution network.Firstly,the method to determine the influence range of the fault stations in the distribution network is established,and the calculation model of the initial distribution state of passenger flow is given.Based on cascading failure theory,a quantitative analysis method of passenger flow propagation law in the distribution network is established,which includes the solution of initial capacity of stations,redistribution of stagnant passenger flow,determination of station status and characterization of passenger flow propagation results.Finally,based on the results of passenger flow redistribution in the distribution network,a method to calculate the distribution capacity of each mode for the subsequent trip of stranded passenger flow is given.Research on evacuation method of stranded passenger flow based on network passenger flow propagation law.Through the establishment of emergency bus dispatching connection model to evacuate the stranded passenger flow at the fault station,combined with the determination method of the influence range of the fault station,the selection principle of emergency bus candidate station is determined.Based on the quantitative analysis of passenger flow propagation law,the objective is to minimize the operation cost and maximize the passenger travel benefit;Taking the length of emergency bus route planning,the number of emergency bus dispatching vehicles and the distance between emergency bus stops as constraints,the emergency bus dispatching connection model is designed and solved.Case analysis of sudden failure of Chongqing rail transit station.Taking Chongqing Rail Transit Line 3 four kilometer station as an example,this paper analyzes the passenger flow propagation and diffusion law of the failure station quantitatively through the model and algorithm,and makes a scientific and reasonable bus emergency connection scheme to evacuate the stranded passenger flow,which proves the feasibility of the theory and algorithm.