Research On The Construction Of The Opposite Pedestrian Flow Motion Model Considering Avoidance And Contact Behavior

Under the guidance of the city’s policy of prioritizing the development of public transportation,the investment in subway lines has increased,the subway network in Beijing has expanded year by year,and the interchange stations and interchange hubs are dense.There are two types of subway interchange horizontal channels: one-way channel and opposite channel.The pedestrian traffic characteristics and behavior characteristics of the opposite channel are more complicated,and the interaction between pedestrians is diverse.When special trips such as peaks and holidays are carried out in the morning and evening,the traffic volume increases sharply,the travel intensity increases,the pressure on the facilities of the hub facilities increases,and the pedestrian traffic speed decreases,the service level of the pedestrians decreases,and the service level decreases.Comfort is affected,and in severe cases,congestion,shoving,etc.may occur.Therefore,analyzing the traffic characteristics of pedestrian flow,grasping the pedestrian traffic behavior,and evaluating the service level of the hub facilities are effective measures to understand the pedestrian flow movement law,construct a comfortable travel environment,and prevent the occurrence of high-risk traffic phenomena.For pedestrian traffic organization and management,facilities Construction and evaluation are of great significance.This paper firstly describes the research status of microscopic traffic pedestrian flow,sorts out relevant literatures at home and abroad,discusses research priorities and deficiencies;combines survey data and video recordings of pedestrian flow in Beijing Fuxingmen subway hub station,and collects pedestrian traffic characteristics parameters,including pedestrian steps.Frequency,stride,speed,flow,space occupation,etc.,analyze pedestrian traffic behavior,including transcendence,avoidance behavior,follow-up behavior,companion behavior,contact behavior,etc.,and comprehensively summarize the characteristics of pedestrian movement,paving the way for subsequent research.Then,this paper introduces the social force model,and discusses its applicability and deficiencies according to its model principle and the actual situation.Pedestrian simulation is an important means of microscopic pedestrian flow research,and the simulation model is its core content.On the basis of the social force model,this paper considers the factors of the same direction and the number of pedestrians in the front of the pedestrian,and optimizes the pedestrian routing process.The avoidance behavior is divided into single avoidance and double avoidance,the same avoidance and opposite avoidance,considering Pedestrian traffic characteristics and behavioral preferences,improve passive avoidance and active avoidance,and propose a more reasonable avoidance mechanism;combined with particle discrete element model to improve the contact force of opposite pedestrians,and construct a perfect opposite pedestrian dynamics model.Finally,based on the dynamic model to build a pedestrian simulation platform,reference to the relevant literature and data collection,parameter analysis and calibration of the model,and verify the accuracy of the model from both macro and micro levels.In order to expand the application scope of the model,the hub channel is taken as an example to analyze the changes of the channel width and the proportion of the number of opposite pedestrians,which leads to the change effect of the flow state of different flow and density,and gives the service level of the channel in the corresponding state.As a reference for facility construction and evaluation,it also proves the practical significance of the model and the theoretical significance of the research.