Social Force Model of Clustering in Emergency

• 1、State Key Laborary of Information Photonics and Optical Communications,Beijing University of Posts and Telecommunications,Beijing 100876

Abstract：Social force model is a classical crowd simulation algorithm, But it doesn't consider the phenomenon that the crowd presents relatively intelligent group conformity in emergency. To increase the authenticity of evacuation in emergency, this paper adds the clustering strategy based on the classical social force model, and puts forward the dynamic equation of the improved social force model. By clustering, the model can simulate the on-site psychological state of travelers, and show the tendency of conformity of individuals in emergency. Pedestrians can form different groups according to the environment, their movement and other relevant information. In the process of evacuation, due to the individual's dependence on the group, this paper also proposes the concept of group self cohesion, it can simulate the situation that pedestrians with high intimacy depend on each other and help each other. Finally, simulation experiments are carried out on Unity3D engine for different evacuation scenarios to verify the effectiveness and scalability of this method.

Keywords： crowd simulation social force model emergency evacuation herd mentality