Improved social force model based on analysis of pedestrian panic emotion
In order to deeply analyze the influence of pedestrian panic on the efficiency of group evacuation under emergencies,this paper analyzed and constructed a quantitative model of pedestrian panic,which was composed of two parts:self-panic and panic propagation.First,the model considered factors such as detention time,local density,the distance between pedestrians and exits,the density of people around and the spread of pedestrian panic.Then it was introduced into the social force model for improvement and optimization,and verified the validity by comparing with the classical phenomenon.Finally,the simulation analysis was carried out using Anylogic software.The results show that the improved model can better reflect the evacuation movement characteristics of pedestrians in panic situations.A moderate panic,such as when the panic degree is less than 0.3,can accelerate the evacuation speed of the crowd.A high panic,such as when the panic value is greater than 0.3,can exacerbate the bottleneck phenomenon,and the so-called ＂ fast is slow＂ phenomenon occurs,thus reducing the evacuation efficiency.
pedestrian panicsocial force modelcrowd evacuationAnylogic＂Fast is slow＂
NETL
NSTL
万方数据
