Simulation Study On Emergency Evacuation Of Passengers In Subway Platform

As a place with high traffic density,how to evacuate passengers safely in case of emergencies has become a important problem to be considered in subway emergency management,Using computer simulation method to study evacuation process is the main research method at present.The purpose of this paper is to establish a platform passenger emergency evacuation model and reappear the real evacuation scene by analyzing the psychological and behavioral characteristics of passengers in sudden situations,so as to provide suggestions for the layout and emergency management of subway facilitiesBased on evacuation dynamics and pedestrian flow theory,this paper analyses the psychological characteristics,decision-making mechanism and behavioral characteristics of passengers during emergency evacuation,and designs questionnaires from three aspects:basic characteristics of passengers,mastery of emergency knowledge,and behavioral response of passengers,and conducts field investigations to study the psychological and behavioral characteristics of passengers and the station traffic facilities.The impact on group evacuation provides a basis for the establishment of the model.A passenger evacuation model at platform level is built on Netlogo and Pathfinder simulation platform by using agent method.The simulation design of the model includes platform level evacuation environment design passenger attributes design and motion rules designThe effect of passenger panic on evacuation is simulated based on Netlogo when exit width is 4 m and 2.4 m,respectively.The results show that the effect of panic degree on evacuation time is basically the same with different exit width.With the increase of panic degree,the larger the range of average evacuation speed fluctuation is,the lower the evacuation efficiency is When the number of passengers is small,the lower the herd,the higher the evacuation efficiency When the number of passengers is large,strong directional herd behavior plays a positive role in shortening the evacuation timeBased on Pathfinder,the evacuation process was analyzed when the exit width is 4m and 2.4m,respectively.The results show that when the exit width is 2.4m,the group evacuation time in peak period is 383 s,which can not meet the requirements of relevant standards.It shows that the exit width has an important impact on the group evacuation.By simulating the influence of the length and layout of isolation railings on the evacuation process,the results show that when the number of passengers is large,the setting of isolation railings in queue increases the area of crowded people.Group evacuation has adverse effects.When the number of Evacuators is small,the setting of isolation railings at the escalator of the building has little effect on the evacuation time.When the number of Evacuators is 3000,the setting of isolation railings of 4m and 6m reduces the evacuation time by 9s and 21s respectively compared with the setting of isolation railings without isolation railings.When the length of isolation railings exceeds 10m,the setting of isolation railings will increase the distance of passengers to the safe exit and increase the evacuation time.