考虑双向群组运动特征的场域模型研究

Study on group behavior in bidirectional flow using a modified floor field model

行人动力学的研究能为火灾等紧急情况下的疏散研究提供理论支撑。现有研究多以独立行人为研究对象,群组作为行人流的重要组成部分,有必要进行研究分析。以场域模型为基础,在前人提出群组场的基础上进行拓展,并引入预测场模拟群组行人避让行为,构建了考虑双向群组运动特征的拓展场域模型,对双向群组运动特征进行研究。在双向流通道中进行模拟发现:随着预测场敏感性参数增大避让行为意识增强,时间损失增加,与反向行人的正面冲突减少;拓展模型能使群组维持较近距离的同时减少群组成员之间的冲突;该模型能模拟密度越大速度越小的典型现象。

Pedestrian dynamics research can provide theoretical support for evacuation studies in emergencies such as fires.However,most research on pedestrian dynamics focused on individual movement.As an important part of pedestrian flow,the group dynamics is also necessary to be analyzed.In this paper,a modified group field based on the floor field model is presented to study pedestrian group dynamics.By considering the attributes of groups in bidirectional flow,the anticipation floor field is used for simulation.The simulation results in a channel show that with the increasing value of the sensitivity parameter for the anticipation floor field,the frequency of avoidance behavior and total time loss increases,and the conflict with counter pedestrians decreases.The extended model enables groups to maintain a closer distance while reducing conflicts between group members.Moreover,the model can simulate the typical phenomenon that the speeds of group members decrease with increasing density.