Vulnerability Assessment Of Urban Subway Station Operation System

With the increasing urbanization in China,the subway,as an important part of urban rail transportation,has become an important way to relieve ground transportation pressure in economically developed cities and densely populated areas because of its advantages of large passenger capacity,speed,punctuality,and not taking up ground space.In recent years,the scale of the subway network has been expanding,and the passenger flow has been growing gradually.Urban subway stations are characterized by small space,high density of people,and high traffic volume,which can easily magnify the impact of the event itself and bring great challenges to the safety of subway station operation when facing unexpected events.Therefore,in order to ensure the safety and stability of urban metro stations,how to explore the causes of their vulnerability,take effective measures to improve their operation,and build a scientific and reasonable evaluation system has become a pressing problem to be solved.In this paper,we study the vulnerability of the metro station operation system according to the idea of identifying,analyzing,and evaluating the vulnerability of the metro station operation system.Firstly,we analyze the types of accidents related to urban metro stations in China,the causes and impacts caused by the accidents,compile a large amount of relevant literature,identify the main factors of vulnerability of urban metro station operation,and build a vulnerability evaluation index system of urban metro station operation from four dimensions,such as personnel factors,equipment systems,environmental systems,and management systems.Then,considering the interconnectedness of the evaluation indexes,the DEMATEL method is used to analyze the dependency relationships among the vulnerability factors and identify the important factors and key influencing factors that affect the vulnerability of the metro station operation system through expert consultation.By constructing a vulnerability factor association network model,the complex cause-and-effect relationships among the vulnerability factors are clarified,and a cause-and-effect relationship diagram is drawn.Then,combining with the ANP-grey cluster analysis evaluation method,the vulnerability factor weight setting and vulnerability level evaluation of the subway station operation system were carried out,respectively.Finally,the evaluation model was applied to a typical station of the Xuzhou metro to determine the cause-effect relationship between indicators,analyze the influence relationship between indicators,determine the vulnerability level of the station’s operation system,and propose targeted control measures and suggestions based on the research results.The evaluation results show that the vulnerability level of station P is "mild",and the possibility of accidents in the face of disturbances is low,which is basically consistent with the actual situation,but the station needs to pay attention to the influence of environmental factors on the vulnerability of the station operation system.Through theoretical analysis and case application,it can be shown that the DEMATEL-ANP-Grey cluster analysis model has good applicability to the vulnerability evaluation of urban metro station operation systems in China.This paper achieves a rank quantification of the vulnerability of urban metro station operation systems,which can,to a certain extent,help the operation management units of metro stations enhance their ability to resist the disturbance of external and internal uncertainties of the system,reduce the probability of accidents and the degree of impact,and provide a theoretical basis and reference for the in-depth study of metro station operation safety management.