Study on Development for Practical Prediction Method of Ship Manoeuvrability in Shallow Water and Narrow Waterways

国际海事组织讨论了关于操纵手册中应包括的信息和关于操纵性标准的一些问题。同时，对船舶操纵性设计初期预报方法的发展也提出了展望，本文以此为背景，对浅水和狭窄水道中船舶操纵性预报方法进行了研究。根据两年来的研究结果，得出了以下结论。(1)利用本文提出的数学模型，可以估算船舶在浅水中的操纵性能。(2)[该数学模型通过对深水资料的扩充，可用于估算任意水深的水动力。(3)在本模型的水动力系数中，船体与舵、螺旋桨与舵的相互作用力系数对船舶操纵特性计算结果的任何微小变化都是敏感的。(4)本研究还提出了如何估算船舶在均匀岸壁和非均匀岸壁（如渠壁、防波堤和楔形岸壁）附近所受的水动力的方法，为船舶设计初期的操纵性预报、浅水和限制水域船舶的控制系统设计、船舶的动力学设计和船舶的动力学设计提供了理论依据用于海上交通管制系统的讨论，也可用于港口或运河的建设。

Some problems on information to be included in the manoeuvring booklet and on the manoeuvrability standards has been discussed at the International Maritime Organization. At the same time, the development of prediction method for ship maneuvrability at the initial stage of design will be expected.As the background with these points, this research examines the prediction method of ship manoeuvrability in shallow water and narrow waterways. From the results of this research during two years, the following conclusions have been obtained.(1) We can estimate the manoeuviring performance of a ship in shallow water by using the mathematical model proposed in this research.(2)[ This methematical model can be used for estimation the hydrodynamic force in any water depth by expanding the data on deep water.(3) Among the hydrodyname coefficientsin this model, the coefficients of interaction forces between hull and rudder, or propeller and rudder are sensitive to any small change in computational results on ship manoeuvring charateristics.(4) This research proposed also how to estimate the hydrodynamic force acting on ship in the proximity of uniform and non-uniform bank wall such as canal wall, breakwater and wedge-shaped bank wall.from the above results, the calculation and simulation methods proposed in this research will be useful for prediction of a ship manoeuvrability at the initial stage of design, for sutomatic control system of a ship in shallow and restricted water, for discussion of marine traffic control system and also for construction of harbor or canal.