Simulation Research On Crowd Evacuation Under Emergency Public Events In Subway Station

With its convenience and economy,the subway has become an important part of urban public transportation.Due to the typical characteristics of relatively closed space and dense peak crowds in subway stations,in the face of public emergencies such as terrorist attacks,the evacuation of people in the station is relatively difficult,and the external rescue is quite limited.In addition,the crowd may have stressful behaviors such as tension,confusion,and panic in the event of an emergency,which can easily lead to serious casualties and property losses.Therefore,studying pedestrian behavior characteristics and crowd evacuation strategies in subway stations under public emergencies has important practical significance to reduce casualties,property losses and social impacts,and to improve the emergency response capabilities of the subway transportation system.This thesis is based on a multi-agent pedestrian evacuation simulation model,taking a common underground two-story island subway station as an example,and using Any Logic simulation software to establish a pedestrian evacuation simulation model in a subway station under a public emergency scenario Based on the degree of crowd concentration,the concept of risk points in subway stations is proposed.From the perspective of reducing the pre-risk of public emergencies in the station,combined with the crowd density map under different inbound passenger flow conditions,the location of the police force under normal conditions is proposed.Taking the terrorist attack as the background,the influence of the opening strategy of different bottleneck passages such as gates and escalators in subway stations on the evacuation efficiency was studied.The simulation experiment results show that the strategy of opening the gates in time and adding escalators can speed up the efficiency of evacuation,and the opening strategy of the bottleneck channel should be opened from downstream to upstream.The simulation model is used to simulate the situation in which an explosion triggers a fire and forces pedestrians to re-plan their evacuation routes,and the effect of pedestrian station familiarity on evacuation efficiency is studied.The results show that improving pedestrian station familiarity through evacuation guidance can speed up evacuation efficiency.The main risk points in the evacuation process are the right-angle corners and the bottleneck channel,and a risk control guidance strategy to control speed and adjust flow distribution is proposed.The simulation results prove that the proposed measures are effective.Finally,based on the experimental results,suggestions for actual evacuation management were put forward.