Study of the Indoor Evacuation Based on the Grouping Social Force Model

When the social force model is used to simulate the crowd evacuation, how to reduce the amount of calculation of the original model is an important problem which can not only affect the speed of solving the model but also control the program running time. This paper investigates the impact that the number of each team’s members and the scale of crowd have on the evacuation time and the program running time in rooms with different exit width. Therefore, it proposes the grouping social force model, in which the crowd is to divide into multiple groups and each group is considered as a whole moving unit to decrease the computation time of the social force model. The simulation results show that evacuation time and programs run time will decrease with declining of the groups’ number, and the amplitude of attenuation is dynamic changing. Meanwhile, the results suggest that the proper number of each team’s members should be set to a different width exit in a regular rectangle room, and for large scale crowd, the effect of the grouping strategy is more effective.