Research On Pedestrian Traffic Flow Organization Based On Multi-level Network

With the rapid development of national economy,the population density of cities is increasing year by year.With the rapid development of urban transportation and system,pedestrian travel is more convenient,and the mobility of urban people is increasing.The construction of large-scale pedestrian facilities reduces the cost of social organization activities and makes crowd gathering more convenient,resulting in a common phenomenon of clustering in life.There are great potential safety hazards in places with high crowd concentration,and congestion and stampede events are easy to occur at the bottleneck of congestion.Pedestrian congestion events have the characteristics of sudden,unrepeatable and dangerous.Organizing pedestrian congestion experiments has a certain risk,and it is difficult to obtain on-site data for research and analysis.Data based computer simulation is a main means to study pedestrian congestion,but there are some shortcomings in large scene simulation,such as difficult modeling,large amount of calculation and low efficiency.Taking the pedestrian flow organization in the pedestrian scene as the research object,this paper constructs the pedestrian pedestrian network,establishes the traffic flow distribution model of the pedestrian network considering congestion queuing,explores the operation law of pedestrian flow in the large passenger flow scene from the macro static point of view,and analyzes the causes,spread and evacuation process of pedestrian congestion,which will supplement the deficiencies of relevant domestic research,Provide theoretical guidance and technical support for pedestrian organization in the scene.The main research contents of this paper are as follows:(1)Build a pedestrian network.Classify the pedestrian facilities,explain the basic concept of pedestrian network,build the basic scene of pedestrian network from macro and micro levels,and determine the road resistance basic function and basic parameter range of road section in the network according to the characteristics of different levels of network.(2)The user equilibrium principle of traffic flow distribution in pedestrian network considering congestion queuing is proposed.This paper puts forward and demonstrates the basic inferences such as "equal time at the end of the queue passing through the bottleneck",proves the equivalent relationship between "user equilibrium in partially completely congested areas" and "equal time at the end of the queue passing through the bottleneck",puts forward the user equilibrium principle of pedestrian network traffic flow allocation considering congestion queuing,and improves the traffic flow allocation theory considering congestion space queuing.(3)An iterative weighted algorithm considering congestion queuing is established.Based on the proposed user equilibrium principle and basic inference,the demand loading mechanism of "global area minimum and local congestion area maximum" of the network "selecting the shortest path in the global area and the longest road in the local congestion area" is established,and an iterative weighted solution algorithm of traffic flow allocation considering congestion space queue is constructed.(4)Verify the effectiveness and applicability of the allocation theory and algorithm.Through the calculation of different examples,it shows that the algorithm can approach the effectiveness of user equilibrium.Through the application of practical scenarios,it shows that the algorithm can be used in the study of pedestrian traffic flow organization,and verifies the applicability of the allocation model.