基于出口选择概率的修正社会力模型的行人疏散研究

Study on Pedestrian Evacuation Based on Modified Social Force Model with Exit Choice Probability

基于原始社会力模型,引进相对速度和出口吸引力以及对期望速度加以限制来对原始社会力模型进行修正,通过考虑行人与出口距离和出口处行人密度对出口选择的影响,结合概率决策,引进出口选择函数,构建了基于出口选择概率的修正社会力模型。利用编程对多出口行人疏散行为进行仿真模拟,分析突发事件下行人疏散的行为特征,验证基于出口选择概率的修正社会力模型的科学性和有效性。

In order to improve the evacuation efficiency during multi exit room, the social force model is modified by introducing relative velocity and considering the influence of the exit distribution in the evacuation space. Considering the influence of distance between pedestrians and exits and pedestrian density on exit choice, a modified social force model based on exit selection probability is constructed by introducing the exit selection function with probability decision.Simu lation is performed which the behavior characteristics of pedestrian evacuation are analyzed in an emergency. And the re suits show that the proposed model is scientific and effective.