Evaluation Of Transportation Service Quality Of Urban Rail Transit Network Under Station And Interval Failure

In recent years,the occurrence of various emergencies has affected the transportation service quality of urban rail transit network.Therefore,it is of great significance to evaluate the impact of emergencies on the transportation service quality of urban rail transit network for maintaining a high level of sustainable development.In this thesis,from the two levels of urban rail transit station and section,the evaluation system of urban rail transit network transportation service quality is constructed when the station and section fail.The main results are as follows:Starting from the urban rail transit network itself and based on the complex network theory,the vulnerability assessment model of urban rail transit network is constructed to study the impact of station failure on the quality of transport service after emergency.According to the station data of Chengdu Metro network,the topological structure model of Chengdu Metro network is obtained by modeling with MATLAB.Then,the intentional attack and random attack based on node degree and betweenness are carried out,and the network connectivity ratio,network transportation efficiency and station service index are selected as the evaluation indexes.It is found that with the increase of the number of station failures,the quality of transportation service continues to decline,and the intentional attack based on node betweenness has the most obvious effect on the quality of transportation service Key site.Based on the evaluation standard of passenger behavior,the passenger flow data of a morning peak of Chengdu Metro is obtained.The stochastic equilibrium assignment model based on logit model is used to divide the passengers after interval failure into three categories: A,B and C.The average generalized travel cost difference before and after interval failure is obtained by mswa algorithm,so as to construct the evaluation index of interval service index.The MATLAB simulation results show that: with the increase of the proportion and number of section failures,the number of class B passengers increases first and then decreases,while the number of class C passengers increases slowly and then increases sharply;With the increase of the number of failures,the average generalized travel cost of passengers reaches the maximum value of 425 min when the failure ratio is greater than 0.2 and the failure interval is 4.