Research On Disaster Risk And Vulnerability Of Rail Transit Based On Complex Network

Nowadays,with the rapid development of China’s cities and the gradual influx of population,it shows a series of urban problems such as insufficient urban space capacity and traffic congestion,and urban rail transit system is an effective measure to solve urban problems.Nowadays,rail transit is gradually forming a mature network system in the city,which makes rail transit enter the network era.At the same time,due to the universality of rail transit and the complexity of the operating environment,if a disaster occurs,it will have a major impact on people’s life order and life and property.Therefore,it is of great significance to study the disaster risk and network vulnerability of rail transit based on complex networks.The characteristics of urban rail transit operation network are summarized in this thesis,and the evaluation method and network vulnerability related theory for the risk disaster chain of rail transit operation network are explored.On the basis of the formation of the disaster chain,a complex network of risk conduction disasters of urban rail transit operation system is constructed.And we analyze and evaluate urban rail transit disasters with disaster complex network,disaster chain and risk unit as the target system.And corresponding risk management measures with practical guiding significance is proposed.The latest Wuhan rail transit network system is took as the research object in this thesis.And we comprehensively consider the two indexes of connected OD ratio and travel efficiency ratio,and use transport capacity loss as an indicator to assess network vulnerability,and analyze the vulnerability of Wuhan rail transit network under different attack simulations.The key site of the Wuhan rail transit operation network is obtained.At last,the location model of P-center emergency rescue station is established by using the theory of network centrality in this thesis.The optimal solution of the model objective function is obtained by programming through genetic algorithm,and finally the detailed location plan of Wuhan Rail Transit Network Emergency Rescue Station is obtained.The reliability of the scheme is verified by comparative analysis of invulnerability,which can provide decision support for urban rail transit network emergency rescue organization and risk control.