Cascading failure model based on adjustable redistribution of traffic flow
In order to improve the reliability of urban road network and reduce the damage caused by cascading failure to the network,the cascading failure of urban road network is studied.Firstly,the urban road network model with double layer network structure was built.Secondly,based on the capacity-flow model and the characteristics of urban road network,the cascading failure model of urban road network was established.Thirdly,the reliability of urban road network was evaluated by four indexes:network efficiency,congestion degree,network traffic quality and normal node ratio.The reliability of urban road network under different failure strategies and congestion failure thresholds was analyzed.Finally,the Shanghai regional road network was taken as an example to carry out a case study.The simulation results show that the reliability of the network is lower under selective attack.The smaller the failure threshold,the higher the reliability of the network,and the stronger the cascading failure resistance.The results of this paper have important practical significance to improve the reliability of urban road network and enhance the cascading failure resistance.
transportation planning and managementcascading failurenetwork congestionreliabilitycomplex networksimulation
万方数据
维普
