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对人群的集体运动进行模拟在基础研究和辅助交通设施设计方面都有重要意义。基于流行的社会力模型,改进的社会力模型考虑了行人的心理因素和行人运动随机性对人群运动行为的影响,可以更真实的模拟人群的实际运动行为。人群疏散行为是一个典型的人群运动问题。利用改进的社会力模型对人群疏散行为进行了模拟,结果表明,在行人密度较大,行人间距离较小的竞争性或恐慌性的疏散模式下,心理因素和随机因素对人群的运动行为有明显的影响。在疏散过程中,行人一定程度的焦虑会提高疏散效率,但是过高的焦虑程度反而不利于人群的疏散;行人随机行为也可以明显的缩短疏散时间,但是随机因子在一定范围内的选择并不会明显影响行人疏散的效率。
Simulating the collective movement of people is of great importance both in basic research and in the design of aided transportation facilities. Based on the prevailing social force model, the improved social force model considers the influence of pedestrian psychological factors and randomness of pedestrian movement on the movement behavior of the population, and can more accurately simulate the actual movement behavior of the crowd. Crowd evacuation is a typical crowd movement problem. Using the improved social force model to simulate the crowd evacuation behavior, the results show that in the pedestrian density larger pedestrian distance less competitive or panic evacuation mode, psychological factors and random factors on the behavior of the crowd have Obvious impact. In the process of evacuation, pedestrians' anxiety to a certain extent will improve the evacuation efficiency, but the excessively high degree of anxiety will not be conducive to the evacuation of the population. Pedestrian random behavior may also significantly shorten the evacuation time, but the choice of random factors in a certain range does not Will significantly affect the efficiency of pedestrian evacuation.