Abstract: As an important component of urban transportation system, pedestrian traffic is attracting more and more attentions from urban transportation researchers and administrants; however, due to the diversity, low-speed, randomicity and self-organization characters of pedestrian flow, it is very difficult to understand and develop a mathematic model to describe the behavior of pedestrian compared with motorized traffic. The authors use computer microscopic simulation to research/evaluate pedestrian traffic, and one of the key preconditions is modeling. That how necessary it is to probe into pedestrian microscopic model was also analyzed, and real data was collected. Then seven pedestrian characteristics, which reflect pedestrian’s psychological characteristics and instinctive consciousness, were presented from some original perspectives. Based on these characteristics, pedestrian virtual dynamics was modeled in the view of dynamics. The model treats a single pedestrian as an entity, which was influenced by virtual self-drive force, repulsive force and pre-avoid force. In the end, two simulation experiences of unidirectional and bidirectional flow were carried to prove the applicability of the proposed model.

Key words: microscopic simulation, pedestrian traffic, virtual dynamics;evacaution

摘要： 行人交通是城市交通系统的重要组成部分，已经越来越受到城市交通研究者、管理者的重视，而行人交通多样性、慢速性、随机性、自组织性的特征使得研究行人交通的难度并不亚于机动车交通。本文着眼于用计算机微观仿真手段来研究、评价行人交通，而仿真的前提之一就是要构建好相应的基础模型。论文首先分析了研究行人交通微观模型的必要性，通过分析采集到的行人交通数据，以不同于传统的角度提炼出了反映人的心理特性和本能意识的行人交通7大特性；在此基础上，从动力学的角度构建了行人交通虚拟动力学模型，该模型把单个行人当作独立的实体，受虚拟自驱动力、排斥力、提前避让力作用。最后通过单向行人流、双向行人流仿真试验表明了模型的适用性。

关键词: 微观仿真, 行人交通, 虚拟动力学, 疏散