浅水域の操縦運動数学モデルの検討 : MMGモデルの浅水域への適用について

概要

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Manoeuvring behaviour significantly changes according to the water depth. It is indispecsable for the examination of the safety in harvour navigation to clarify the characteristics of ship motion in shallow water. After the full-scale trial of Esso Osaka, many kinds of model tests have been performed in deep or shallow water, where the characteristics of hydrodynamic forces acting on hull or rudder have been observed. However, these hydrodynamic data are not sufficient for the prediction of the manoeuvring motion in shallow water, and more theoretical approaches as well as experimental data have been desired. In this report, the predicting techniques are investigated based on the well known MMG's mathematical model. Through the present study, the following conclusions are obtained. 1) MMG's mathematical model is also available for the prediction of the manoeuvring motion in shallow water. 2) Predicted ship motions fairly agree with the observed motions in each water depth. 3) Sinkage and trim in shallow water can be easily predicted by the following simple forms proposed by Tuck and presented here respectively. [numerical formula] [numerical formula] where F_h=U/√<hg>, h:water depth
社団法人日本船舶海洋工学会の論文
1986-03-30