Research On System Dynamics Modeling And Congestion Propagation Control Of Passenger Flow In Urban Rail Transit Network

Under the current network operating condition,the impact of urban rail transit congestion propagation is more serious,need to carry out effective passenger flow control of network congestion propagation problem.In this paper,the passenger flow deduction model constructed by system dynamics method is used to deduce the passenger flow simulation.On the basis of analyzing the characteristics of passenger flow congestion propagation in network system,research on the method of developing collaborative passenger flow control scheme in the network system.The main contents in this paper are as follows:(1)Analyze the characteristics of passenger flow,the meanings and influencing factors of passenger flow congestion propagation in urban rail transit network system;summarize the control measures commonly used in road network congestion.On the Basis of introducing "mode" to describe network congestion propagation status,the method of cooperative passenger flow control is proposed on the basis of congestion propagation modes,and how to implement this method is described.(2)Based on the analysis of the constituent elements of the urban rail transit network system,the system dynamics model of the urban rail transit network system passenger flow is constructed by the system dynamics method.Then,the network system passenger simulation is deduced,along with data of the passenger demand and transportation organization transformed into input data of the model parameters.Passenger simulation deduction provide evidence for carrying out the passenger flow distribution data and the passenger flow congestion propagation control study.(3)Based on the classical SIS congestion propagation model and the principle of traffic balance,determine and calculate the parameters of congestion propagation characteristics in network.In addition,the method of congestion propagation on the basis of congestion propagation modes is proposed.Define the threshold of congestion propagation mode and research the method of determining the overall congestion propagation mode of the road network,which provides the basis for construction of the collaborative passenger flow control model.(4)Regard the collaborative passenger flow control of stations as congestion propagation control pattern.After using the collaborative passenger flow method based on congestion propagation mode to set the objectives and constraints of collaborative passenger flow control in network,Construct and solve the mathematical model of collaborative control of network system,Finally,the local network system of Beijing urban rail transit is taken as the research background for the case studies and validation of the research method.