Simulation Model Of Pedestrian Bridge Crowding And Trampling Process Based On Individual Emotion Value Of Crowd

With the rapid development of China’s country and society,people’s living standards have been greatly improved.In places such as squares,schools and pedestrian bridges,the situation of the activity site is complex,and there is a huge potential risk of stampede accidents.Relevant departments use the method of real situation practice to explore the formation process of stampede accidents,which has the problems of huge cost and potential safety hazards.At the same time,people’s behavior is affected by external and psychological factors,so they can’t completely place people in the real accident site.The use of computer simulation can reproduce the scene of the accident,and then simulate the scene of crowd evacuation in the place.It can intuitively understand the formation mechanism and casualties of stampede,and provide the basis for preventing crowd stampede and dealing with it,which is of great significance to the safe evacuation in public activities.This paper analyzes and studies the formation process of pedestrian stampede accidents by listing four cases of pedestrian stampede accidents,combining with the existing literature and psychology and other multidisciplinary knowledge.According to the traditional classic crowd model,crowd dynamics,crowd emotion model and other basic models,combined with the simulation method of Pathfinder software,the simulation analysis is carried out.At the same time,the mathematical formula model of crowd evacuation emotional value is proposed.Finally,the crowd stampede accident based on emotional value is simulated by using unity3 d,and the mathematical formula model of emotional value is verified.The specific research contents are as follows（1）Firstly,this paper describes the research status of crowd evacuation simulation at home and abroad,and introduces the purpose and significance of crowd evacuation and stampede simulation.At the same time,the principles of classical crowd model（cell model,social force model）,agent routing algorithm（RRT algorithm,Dijkstra algorithm,a * algorithm）and emotional infection model are introduced.（2）Through the network collection,four bridge stampede cases are listed,and the causes of stampede accidents,casualties and crowd behavior are compared and analyzed.Combined with Pathfinder evacuation simulation software,the evacuation simulation of diamond bridge stampede in Phnom Penh,Cambodia is carried out.The data of crowd density and risk degree are analyzed and compared,and the management mode of tourism evacuation is planned.（3）Combined with the classical emotional infection model,the mathematical formula model of individual emotional value is proposed.Using unity3 d software combined with VC #,the system was developed.Based on the agent model,the mathematical formula of individual emotional value was added to build the crowd stampede accident simulation model,and the mathematical formula of emotional value was verified.At the same time,the model belongs to 3D interface,which can more truly reflect the situation and effect in the process of crowd evacuation,which provides a reference for crowd safety evacuation.