Metro Passenger Flow Analysis And Simulation Based On System Dynamics

In recent years,with the vigorous development of subway,the travel pressure of urban residents in China has decreased significantly.With the gradual integration of subway travel into the lives of citizens,sudden abnormal passenger flow has a growing impact on passengers' travel.Therefore,it is of great significance to study the internal passenger flow rules of subway stations and formulate effective measures to deal with abnormal passenger flow.In view of the above problems,this paper takes subway station safety as the first principle,and the controllable bottleneck in the station as the research object,such as train arrival and departure,security check,automatic ticket machine and other links,through regulating its ability to transfer passengers,to achieve the effect of controlling passenger flow and ensuring safety.First of all,this paper takes subway station as the research object.By referring to the advanced research experience at home and abroad,it analyzes the macro characteristics,passenger characteristics and large passenger flow characteristics of the station,as well as the characteristics of passenger flow lines,equipment and facilities and the large passenger flow analysis of the station.This paper studies the theoretical model of subway passenger flow simulation and makes a comparative analysis.Secondly,the concept of adjustable bottleneck is proposed,and the calculation method and procedure of the capacity of static bottleneck are described.Based on the passenger flow of subway platform,the dynamic control method is studied,and the system after the control is evaluated based on the queuing theory.Thirdly,based on the theory of system dynamics,combined with the characteristics of subway station system,the flow system model of station passenger flow was constructed.In view of the controllable bottleneck,the feedback loop process of system dynamics was established.The function equation in the system model was defined and the station system was simulated with Vensim software.Finally,taking Xi 'an Road Station of Dalian Metro as the research object,the passenger flow system model of the station is established with actual data,and the evolution process of passenger flow on the platform under normal conditions is simulated.Then,the key bottleneck of passenger flow is regulated,and the simulation results are analyzed to evaluate the effect of regulation with the method of queuing theory,so as to ensure the safety of the platform and the overall operation of the station.This paper innovatively applies system dynamics to the research on the regulation of the overall system of the station,and evaluates the service level of the regulated station facilities based on the queuing theory,links the subsystem with the overall system,and ensures the overall operation safety of the station through the regulation of key bottleneck links.