Design And Implementation Of Pedestrian Evacuation Simulation System In Fire Scene

With the progress of society,people have gradually mastered how to use and control the fire source.But owing to the wrong manner in using them,disaster may be happened – fire.It was fire that became one of factors that threating the development of human civilization,hindering the development of human society,endangering social and public safety.Fire is one of the common catastrophe,threating to people's lives and property safety seriously.According to the World Fire Statistics Center statistics show that the global annual fire accidents as high as 600 million to 700 million times,resulting in 6.5 to 7.5 million deaths,causing incalculable losses to the people.At present,the focus of fire science research is how to evacuate the population when the fire occurs to minimize the casualties.Fire direct analysis and computer simulation are two main methods to study the fire.The former study and analysis fire after fire happened base on the characteristics of the fire,pedestrian escape,and video data.the latter is the use of computer simulation technology to assume that the fire in accordance with the simulation set the scene,simulation pedestrian evacuation process,access to simulation data,analysis Simulation results,which are used to guide evacuation,reduce casualties,property damage.In this paper,the theory of fire simulation and micro-pedestrian simulation were studied and analyzed in world.The system of fire scene pedestrian evacuation simulation was completed on the basis of the original system,by C++programming technology based on the computer-related technology,fire simulation,micro-pedestrian simulation and other theoretical knowledge.In this system,the technology and tool were that the IDE is MFC,and the IDE is Microsoft Visual Studio2015,the Open GL was used as image rendering tool.This paper had studied the fire simulation field at home and abroad,use the software of FDS(Fire Dynamics Simulator)as the system simulation data collection tool.And this paper had studied the model of he micro-pedestrian simulation,comparative analyzed the cellular automata model and the social force model,then select the social force model as the theoreticalmodel foundation of the system.What's more,through analyzed the fire products,we studied the impact of these fire products on pedestrian safety evacuation.Frantzich and Nilsson studies show that fire smoke can reduce the extinction coefficient,thus affecting pedestrian walking speed.And Purser results show that the hazards of toxic gases to pedestrians in a fire can be quantified by FED(Fractional Effective Dose).And the high temperature affect pedestrian walking path,while pedestrians in a high temperature when the state will burn,loss.According to these studies,the impact of fire products on pedestrian evacuation in the fire scene is realized in the system.In this system,the data of the simulation process were graphically rendered,the fire temperature data,the fire smoke data and the pedestrian evacuation path were displayed in real time.And the output data is that evacuation number,evacuation time,evacuation efficiency,disability,injury degree,injury factors and pedestrian path.