Research On The Computer Simulation Of Safe Evacuation During Building Fires

The simulation and Predietion of human evaeuation during building fires 15 a veryeomPlieated Proeess.Based on some means ofreseareh,sueh as ease observation,fire casesurveying,theory analysis ete,this PaPer makes some research on deeision Proeess beforeevaeuation action and aetual evacuation flow Process.On the basis of the study,this paPerPresents a reasonable caleulating method for the time of PeoPle'5 safe egress duringbuilding fires and develoPs a numerieal simulation model of safe evaeuation.Theealeulating time of PeoPle evaeuation 15 quite aeeurate. 1 .Based on fire ease surveying,we got a large amount of data on deeision Proeessbefore evaeuation aetion and summarized some rules of human behaviors during buildingfires. The faetors that imPaet the behaviors have also been investigated.The results of thesurveying ean helP to Prediet the human evaeuation during building fires. 2 .The dynamieal equation of evaeuation sPeed has been founded and the sPeedequation has also been derived.By making use of the aforesaid researeh and theobservation in a railway station,the sPeed equation was verified.The results indieate thatthe equation ean refleet Preferably the relationshiP between the sPeed and the erowd density, 3 .A network and grid evacuation simulation model was develoPed in this Paper.Themodel firstly comPartmentalized the building into nodes aecording to the funetion of eaehnode and the Possible eseaPe direetion of eaeh node ean be found by analyzing the way-finding tendency of the evaeuees.Then a finite grid of eells 15 generated within eaeh node.A Person Will oecuPy a eell and move from one eell to the others.Onee the initial Positionsand moving sPeeds are set,the new Position of each Person ean be ealeulated aeeording tothe Lagrange equation.The eomPuting stoPs when all the evaeuees have left the building. 4 .An apPlieation software that ean ealeulate the time of evacuation movement wasdeveloPed.By using it the evaeuation system of design building ean be assessed.Thesoftware has several eonvenient eharacteristies sueh as visual oPeration,interaetive mode,VR Presentation,ete. This Paper not only Provides seientifie and rational methods for assessment of firesafety to fire Proteetion engineer, but also offers a reliable referenee for design buildingsystem.