行人交通仿真社会力模型改进研究

An Improved Social Force Model for Pedestrian Traffic Simulation

文中从分析现有社会力模型存在的不足入手,开展行人交通微观仿真社会力模型改进研究.增加行人结伴同行算法,用于模拟行人结伴同行行为;完善行人冲突避让机制,用于消除了行人重叠相互穿越等不合理现象;引入视野影响因子,用于修正行人视野对行人间作用力的影响.在此基础上,构建了改进的社会力模型及其仿真平台,并从行人结伴同行、行人冲突避让、行人流宏观特性,以及行人流自组织现象4个方面验证了改进模型的有效性.

This paper begins with uncovering the limitations of existing social force models,and then improves the social force model for pedestrian traffic microcosmic simulation.The pedestrian walk together mechanism was established to model such a behavior of pedestrian walk together.After that pedestrian conflict avoidance mechanism was proposed to eliminate some unreasonable phenomenon,such as pedestrian overlap and mutual crossing.Simultaneously,visual field factor was introduced to revise the impact of pedestrian's visual field on their mutual acting force.According to the aforementioned three ways,an improved social force model and its corresponding simulation platform were developed.The validity of such an improved social force model was testified through the reconstruction for those phenomena of pedestrian walk together,conflict avoidance,pedestrian flow macroscopic characteristic,and pedestrian flow self-reorganization.