Research Of Evacuation Simulation Software Based On Agent Model

With the further research of evacuation behavior, the method of handling the grid of the evacuation scene and unification of the individual attributes has been unable to accurately describe the evacuation decision-making in the complex environment of the real world. Therefore, in order to make the evacuation results get closer to the real, use the geometric instead of grid scenario and study each evacuee with their own properties and environment to make the corresponding decision-making behavior.Establish the individual evacuation behavior of agent model firstly. Evacuation behavior is controlled by attraction, repulsion and steering force in this model. At the same time, egress selection, collision detection, obstacle avoidance algorithm, speed regulation and other intelligent decision making behaviors has been introduced as well. The choice of exit will accord to the distance between people to related door and number of people who waited to evacuate. These two factors will help to make the optimal decision. The selected export will produce attraction to the people which related to the position of personnel and export. Detection range introduced to obstacle avoidance algorithm, it can determine the direction of walking by testing the priority of other agents and obstacles. The detection range is determined by the personnel's perception-reaction time, response time and their own speed. In the collision detection algorithm, so as to ensure that all parts don't overlap, the agent has to recognize neighboring personnel, obstacles, walls and other surrounding information. Walking speed of the model depends on the density of surrounding population, and its numerical value is calculated by the empirical formula obtained from experiments.The simulation software of intelligent agents which use C++ language to compile based on the above basic ideals. Use the software to simulate basic behavior like follow, avoidance and opposite moving. The results are consistent with the actual observed phenomenon. The software also been used to calculate the rapid flow through outlet, and the results are compared with the experiment. Finally, the feasibility of software in simulation of large scale evacuation is verified by the simulation of a certain exhibition center.