Research Of Evacuation Behavior Simulation Based On Virtual Space

The behavior evacuation crowd depends greatly on the interactions among crowd members and many other factors. So, it is very difficult to formulate it. On the other hand, the number of people must be evacuated is usually very high in emergent situation. It is impossible to do experiment like that due to the great expenditure and the possibility of accidents. So, the main feasible tool can be used to study evacuation dynamics is computer simulation.By analysis and compared of the research results of evacuation simulation, we can find that the computer simulation is commonly by planar grid in this domain of evacuation. The research methods are generally by investigative and statistical analysis in reality, and summed up the rule of evacuation crowed in special environment to get the abstract mathematics models. Create the planar grid evacuation simulation system by the mathematics models already existed. The evacuation simulation platform based on virtual reality is advanced in this paper. And it implements the three-dimensional simulation effect.Based on the analysis of existing microscopic models, a new evacuation simulation model was presented in this paper. Concerned the tradeoff of application and performance, this model was built by the techniques of discrete microscopic model building. With the introduction of many factors, the model can simulate evacuation dynamics under various situations. Comparing with existing models, this one is more flexible.Based on this model, developed the virtual reality simulation system (VRSS) used the virtual reality software worldtoolkit (WTK), and got the reasonable results of evacuation simulation. The general evacuation arithmetic to the behavior rules of evacuation crowd model through the analysis and modeling of evacuation behavior is advanced and the concept of environment status variable and agent status parameter function advanced in the paper. Implement this arithmetic simulation in the VR interface. Implement the response, identify, estimate, decision-making and action process of the agent node to the environment status variable. Build the incident scene and intermit in the uncertain emergency, detect the environment status variable of the virtual environment, made the decision-making and action by matching and estimation of the conditions with the evacuation arithmetic. Display the evacuation behavior by the virtual environment. Implement the data output interface to the user, create the data transfer interface, record the sensor behavior, and supply the valuable data to the decision-making supporting. It also uses for the design phase of the building simulation to check the building rationality and optimize the design. The system has important significance in the cosmically crowd congregate location to the optimization evacuation strategy research in emergency.