Research On Reliability Analytical Method Of Urban Public Transport Complex Network

The priority development of public transport is the main support for the construction of a modern comprehensive system.In recent years,the scale of rail transit network and conventional public transport network has been expanding and merging into an integrated development,which brings convenience to passengers’ travel,but also poses serious challenges to the safe and reliable operation of the multimodal public transport system.With the growing size of public transportation networks and the coexistence of many modes,it is an inevitable demand for urban development to construct a public transportation complex network with a reliable network structure and operations.Firstly,the paper proposes the reliability measurement method of urban public transport complex network.The definition of urban public transport complex network reliability is proposed in accordance with the characteristics of rail transit network and conventional public transport network,and the major factors affecting network reliability are examined from the perspective of endogenous factors and exogenous factors that lead to changes in network reliability.The single-mode public transportation network is developed using Space L’s improved modeling method.On this basis,the method based on community discovery is used to establish composite bus stations based on rail transit stations and conventional bus stations,and the multi-mode public transport composite network is constructed.The reliability measurement model considering the effective path of network passenger travel is built.Secondly,the reliability evolution analysis method of urban public transport complex network is proposed.According to the reliability evolution process of public transport complex network,the corresponding network attack strategy is designed by summarizing the attacks on the real network.Using the Coupled Map Lattice Model(CML),identify the state of the public transportation complex network under the influence of various attack strategies,propose passenger flow transfer rules based on the flow,and investigate the evolution law of the public transportation complex network’s reliability.Finally,the paper uses the bus complex network in the core region of Changchun City’s Nanguan District as an example,and applies the network reliability measurement method and evolution analysis method described in the paper to simulate and analyze the bus complex network’s reliability in this area.As according research findings,the reliability collapse threshold of the region’s public transportation complex network varies after using attack techniques with varying attack levels.At the same time,identify the network’s critical nodes and discover that the more significant the nodes are,the higher their reliability when in the saturation state,and the lower their reliability when in the failure state.Furthermore,the examination of the impact of network coupling strength on network reliability reveals that,to a degree,increasing network coupling strength can increase network reliability.The paper enriches the research on the reliability of urban public transport complex network.It provides the theoretical basis and method support for the public transport management department to improve the network reliability,and provides method reference for identifying areas in the system that need to be protected.