A Co-operative Research on the Safety of Harbour Manoeuvring

本文从以下几个方面对港口船舶操纵安全问题进行了研究：1）操纵运动模型。研究的主要目的是提高船舶在浅水中低速时的操纵性。首先，针对深水沃茨进入港区后模型参数的变化，建立了一个实用的运动模型。其次，对侧壁效应和瞬态操纵性进行了理论和实验研究，为今后的研究指明了方向。此外，本研究首次成功地对拖船和船舶进行了水动力学研究。这表明拖船协助船舶操纵的有效速度比积累的经验所期望的要高得多。2）港口海上交通管制。从这一点来看，独立避碰系统和海上运输系统都是一种很好的选择。 ...更多信息 采取有效的控制措施进行检查。本计画所开发之专家系统，在遇到“今津问题”这类避碰难题时，能比经验丰富的船长做出更好的决策。将该算法应用到船舶自动控制系统中，将大大提高各船的避碰能力。而这种与船舶获得相互通信通道的能力的提高，将使船舶控制系统从过去认为的集中式海上交通向分布式智能系统转变成为可能。安全性评价。通过对船舶操纵性安全性评价的研究，使我们认识到船舶操纵性与实际海洋灾害之间可能存在着某种密切的联系。为安全评价提供了一种分析方法。通过对船舶操纵方法的数据收集、分析和改造，将数据转化为基本的操纵方法，并利用模拟器进行评价实验，从而获得了船舶操纵安全性的评价结果。今后不应改变。如果这个项目的每一个贡献者继续处理他自己的责任，相互理解，这个研究将结出丰硕的果实。少

This investigation deals generally with the safety of ship handling in harbour from the perspectives as follows;1) Manoeuvring motion model. The study aims mainly at improving the manoeuvrability of ships in shallow water at low speed. First, a practical model of motion was constructed by focusing how the parameters of the model change after a ship in deep waters comes in a habour area. Secondly, some thoretical and experimental researches on the side wall effects and on the transient manoeuvring were newly launched, which resulted in showing us a direction to go ahead in the future. And in addition, for the first time, this study succeeded in the hydrodynamical study dealing with both a tug boat and a ship. This made it clear that the effective speed at which a tug boat can help ship handling is much higher than what has been expected form accumulated experiences.2) Marine Traffic Control in Harbour. From this point of view, the stand alone collision avoidance system and the marine tr … More affic control were taken up to be examined. The algorithm using the expert system developed in this project can make a better decision than experienced ship master at the difficult situation for collision avoidance named Imazu Problems. If the algorithm is put into the automatic control system, each ship's ability in collision aboidance will be improved. And this improved ability with ship's getting a channel for the mutual correspondence, will make it possible to change the marine control system from what has been thought to centralize the congesting marine traffic to the distributed intelligence system.3). Safety Evalutaion. The study safety evalutaion let us know that there might be some kinds of close relations between the ship manoeubrability and the actual marine disasters. It also gave us a analystical method for the safety evaluation. It was aquired by taking following step: (1) collecting data of the ship handling method, (2) analizing and reforming the data into a fundamental handling, (3) applying the result to the evaluation experiment using a Simulator.When investigat in the safety of ship handling in a harbour, we need many perspectives such as manoeuvrabilty, control, System analysis. It should not be changed in the future. And this study will bear a great fruit if each of the contributors of this project continues to deal with his own charge with understanding each other. Less