Abstract: In order to explore the service level of waterways in restricted bridge area waters, and to improve the navigation efficiency and economic benefits of the shipping industry, a cellular automata dynamics model was selected to model and simulate the waterways in restricted bridge area waters and their adjacent waterways. The waterway was divided into restricted bridge area waterway and unrestricted bridge area waterway, and the cellular automata evolution rules were set respectively. The initial state presetting and evolution rule setting of the complex system could be completed efficiently by using cellular automata. The restricted bridge area waterway of the Hu-Su-Tong Yangtze River Public-Railway Bridge was taken as a case study to carry out the simulation and analysis by Python programming language, and the saturation degree and the service level of the waterway in this water area were obtained. The research results show that the saturation of the waterway shows a clear characteristic of changing over time. The experimental model is more accurate in simulating the characteristics of the traffic flow in the real environment; and the service level of waterway in the restricted bridge area can be effectively evaluated under specific conditions according to the proposed simulation model.

Key words: waterway engineering; restricted bridge area waters; cellular automata; channel saturation; motion constraint rule; simulation tests

摘要： 为探究限制性桥区水域的航道服务水平，提升航运业通航效率及经济效益，选取元胞自动机动力学模型对限制性桥区水域的航道及其临近水域航道进行了建模仿真。将航道分为限制性桥区水域航道、非限制性桥区水域航道，并分别设置元胞演化规则；利用元胞自动机能高效地完成复杂系统初始状态预设及演化规则设置；通过Python编程语言，以沪苏通长江公铁大桥的限制性桥区水域为例进行仿真分析，得到了该水域航道的饱和度和航道服务水平。研究结果表明：该航道饱和度随时间变化特征较为明显；试验模型对真实环境中的交通流特征模拟较为准确；在特定条件下可根据该仿真模型对限制性桥区水域航道服务水平进行有效评估。

关键词: 航道工程；限制性桥区水域；元胞自动机；航道饱和度；运动约束规则；仿真试验