Research On The Fire Numerical Simulation And Evacuation Of University Canteen Based On FDS

With the rapid development of computer technology,fire numerical simulation and evacuation simulation technology are widely used in the field of fire safety,disaster relief and prevention.Fire numerical simulation can not only show the spread process of smoke in the fire,but also provide reliable data for building fire risk analysis.The simulation of people’s safe evacuation can accurately predict the necessary time of people’s evacuation,so as to provide a favorable analysis tool for the study of building fire safety.In order to study the law of smoke spread in the period of building fire,this paper analyzes the main factors that affect the safe evacuation of people in the period of fire,and evaluates the safety of the buildings studied in the period of fire reasonably and effectively.In this paper,the computer numerical simulation analysis is used to study the smoke spread process of building fire and the safe evacuation process of people.In this paper,a college canteen was taken as the research object.Through field investigation and measurement,the canteen was modeled by FDS,and four kinds of fire scenarios were set up according to the most unfavorable principle,so as to fully understand the smoke spread law in the canteen under each fire scenario.At the same time,monitoring points should be set up at the stairs of each floor and 2m height of the exit of the canteen to monitor the flue gas temperature,CO concentration and visibility respectively,and determined the time when the fire hazard came at each monitoring point.In this paper,the evacuation simulation software Pathfinder is used to establish the whole building evacuation model,analyze the evacuation movement time at each monitoring point,and then get the necessary time of evacuation.The safety evacuation time from the fire numerical simulation and the necessary evacuation time from the personnel safety evacuation simulation were compared and analyzed to determine the safety of the university canteen.The results show that visibility was the main factor that restricts the evacuation of the canteen;the location of the fire source in the low floor was more dangerous than that in the high floor;under the four working conditions,it could not ensure that all the internal personnel evacuate safely when the danger came,which shows that there were certain safety risks in the canteen.Through the fire simulation software FDS and the evacuation simulation software Pathfinder,the development of the fire field was connected with the evacuation of the people.The simulation environment and the development of the real fire had a high degree of agreement.The research method had a certain degree of scientificity,which provided certain decision support for the internal fire protection design and fire protection rectification of similar large-scale canteen buildings.