Research On Modeling And Simulation Of Crowd Emergency Evacuation Behavior In Metro Hub Station

With the development of China’s rail transit,subway has become an important public transport tool for people to travel.Its advantages of large capacity,convenient travel and predictable time make it the main object of urban infrastructure construction.However,the reality of large passenger flow volume also brings some potential risks.Once an emergency occurs,if a large number of passengers in the station cannot be safely and effectively evacuated in time,pedestrians may panic due to unsafe factors,leading to irregular evacuation behavior and aggravating the crisis.Therefore,when an emergency occurs in the subway station,how to quickly and safely evacuate the people on the platform to the safe area is a problem worthy of further study.This paper takes this as the object,and researches the pedestrian prevalence in the event of an emergency in the subway hub.Firstly,considering the impact of the formation and communication of pedestrian panic on passenger evacuation behavior in the subway hub station.The composition of passenger flow group is relatively complex when emergency occurs in the station.In the process of subway station collective evacuation,the evacuation individuals are not only affected by the surrounding evacuation environment,but also affected by the interaction between pedestrians,resulting in panic.Based on this,an improved social force evacuation model considering pedestrian panic and its spread is constructed.The panic value is introduced into the classical social force model to improve the expected speed and direction of group movement in the social force model.Secondly,small groups with different social relations in subway passenger flow are considered.Based on the analysis of the interaction and intergroup forces between members of small groups under different social relations,a small group evacuation model considering social relations is constructed.Moreover,the movement speed of small group members under different social relations is improved to make the improved model closer to the actual situation of pedestrian evacuation.Finally,a complete micro simulation model of Shenyang north railway station is established based on the background of Shenyang north railway station.The pedestrian evacuation process is modeled and simulated on the Anylogic simulation platform.The simulation results show that the evacuation model considering pedestrian panic and communication and the small group evacuation model considering social relations can better reflect the real subway pedestrian evacuation.And the research results of this paper will provide effective help for Metro Station rail transit operation and management department to understand the characteristics of group evacuation behavior.In addition,it provides an important basis for the operation management and emergency evacuation guidance of the metro hub station.