Research On The Structural Characteristics Of Urban Rail Transit Network Based On Complex Network Theory

With the rapid development of urban rail transit,people’s travel became more convenient,efficient and safety.In today’s complex social environment,Such as intentional destruction(the terrorist attacks)and the irresistible natural calamities(floods,earthquakes,etc.),the residents personal safety and property safety is threatened.So Urban Rail Transit network structure and functional properties is especially important.Analysis of the structural characteristics of urban rail transport network can clearly find the city rail transit network in the important issue of the station and the network structure and layout.This makes traffic management departments more attention to these key sites.That can prevent the occurrence of unexpected events that disrupts and destroys the urban rail transit of safe operation.To ensure that personal safety and property security is not threatened,to strengthen the rational planning for the future rail transit network.This paper took the Dalian rail transit network as the research object,and combined the concept of complex network with the actual public transportation.Calculate complex network parameters according to Dalian rail transport development plan by using the software Ucinet,then analysis the Dalian rail network development trend from 2002 to 2020 by the network parameters.Finally,took the 2020 Dalian rail network for the study,analysis from the network reliability and survivability,respectively.When analyzing the rail network reliability,reliability index parameters were compared,including Node degree,Closeness centrality,Betweenness centrality,Connectivity reliability.When analyzing rail invulnerability,compare the results of suppose random attack assumptions and suppose select attack assumptions,Draw two kinds of attacks at the largest rail network connected subgraphs relative size and network efficiency curve,and analyze the trends.Results show that,Dalian Rail Transportation Network node high,closeness centrality and betweenness centrality the large sites exhibited stronger reliability.The Connectivity reliability size were impacted by the size of node degree,the greater the node degree,Connectivity reliability when subjected to the impact of the more obvious damage;Network survivability under the anti-choice attack which based on the size of the node of the order worse than random attacks.When the authorities want to build rail network,need to improve the network density and strengthen the hub site protection.Based on the research on the characteristics of the network structure,this paper that utilizes the fuzzy cluster analysisof systematic analysis,further analysis of the importance of Dalian’s rail transit stations.The rail network’s stations divided into three categories according to importance.To strengthen protection and construction the more important station in order of importance.That provides important theoretical basis for the rail of traffic management department.