Urban Rail Transit Network Connectivity Reliability Analysis Based On The Complex Network

In the process of cities motorization and urbanization in China,urban rail transit plays an extremely important role in the urban public transport system.With the increasing process of urban rail transit network,urban rail transit can not operate normally and the daily travel of urban residents will be impacted greatly when unexpected events occur.Therefore,the research focuses on the trend of network connectivity reliability when network is being attacked.It has great significance for the construction and operation of urban rail transit and resource development.This paper studies on the characteristics of urban rail transit network,introducing complex network theory,and using the Space L method to construct the topology structure of urban rail transit network.Then,using TOPSIS method,the importance evaluation model of urban rail transit complex network node is established.Moreover,the reliability of urban rail transit network is defined and its influencing factors is analyzed.Finally,the reliability index of urban rail transit network and its measurement benchmark are determined.On the basis of fully considering the realistic needs of rail transit network characteristics and reliability in different stages,the development stage demonstration for urban rail transit network in terms of functional orientation is carried out.The complex network model of Nanjing urban rail transit under different development stages is established.The station network characteristics such as degree,median and clustering coefficients are calculated and analyzed in the model.According to the importance model of urban rail transit network nodes,the importance ranking of stations in different development stages of Nanjing is obtained.Based on this,the selective attack on Nanjing urban rail transit network is selected.And the trend of Nanjing urban rail transit network reliability in different development is obtained.Finally,based on the analysis results,the optimization suggestions for improving the reliability of urban rail transit networks are proposed.