Research On Passenger Flow Distribution Of Urban Rail Transit Network Under Interval Failure

The number of cities that have opened urban rail and the newly-built metro lines in my country is increasing,and the rail transit in many cities has entered the network operation.In this context,it is of great significance to the urban rail operation organization to study the passenger flow distribution problem in the case of section failure and analyze the countermeasures under the section failure.This paper first expounds the relevant theories of the research problem,and enumerates the construction methods of network topology map,generalized path cost,path search algorithm,random equilibrium allocation model,etc.,which lays the theoretical and method foundation for the following.Secondly,according to the surveyed one-hour AFC passenger flow data and other data in the evening rush hour of Hangzhou Metro on a certain day in 2019,the Hangzhou Metro passenger flow distribution model and the destruction resistance evaluation model after interval failure are established,and destruction resistance evaluation index is defined.Based on the model,the algorithm flow of passenger flow allocation in the case of section failure is constructed.Based on the algorithm flow proposed in the article,MATLAB is used to simulate the passenger flow allocation after complete section failure and partial failure.destructive indicators are calculated.Finally,the results are analyzed,and the cross-sectional passenger flow before and after the failure of the most important section is compared,and it is found that the degree of networking of the research object is low,and the failure of the most important section brings more lost passengers than the passenger flow of changing routes;It is obtained that if the two most important intervals in the network fail completely,the two destruction resistance indicators drop to 85% and 75% respectively;if they fail partially and maintain a certain service level,up to four more important intervals are allowed to fail.The urban rail transit network allocation algorithm after interval failure designed in this paper can simulate the passenger flow allocation process under two failure conditions.The combination of passenger flow allocation results and destruction resistance evaluation can provide more targeted suggestions for the research object network.It has certain application prospects in rail transit operation and emergency plan formulation.