Cascading failure analysis of large-scale urban rail transit network considering station coupling relationship
An improved coupled map lattice model was proposed to analyze the mechanism of cascading failures on the large-scale urban rail transit network with dense stations.The evolution of passenger flow between coupled stations and the anti-risk ability of coupled stations were quantified combining the characteristics of the dense distribution of stations on the large urban rail transit network.The spreading process and results of cascading failures were evaluated with the station failure ratio and the network efficiency ratio.The urban rail transit network in Shanghai was taken as an example to verify the feasibility of the proposed model.Results showed that the scale of cascading failures between coupled stations was about 2 times bigger than that between adjacent stations when the stations with high degree or large in-flow failed.Cascading failures triggered by the station with high betweenness centrality spread rapidly due to the impacts of cascading failures of coupled stations.Additionally,the effect of the network passenger flow on the cascading failures on the large-scale urban rail transit network was about 9 times bigger than that of topology,when considering the cascading failures between coupled stations.The results can provide scientific suggestions and support for the planning and design,and traffic incident management of large-scale urban rail transit network.
large-scale urban rail transit networkcascading failurecoupled stationscoupled map lattices modelanti-risk ability of station
NETL
NSTL
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