港湾内での操縦運動を表わす数学モデルについて

概要

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The demands for the estimation of the ship maneuvering performance are increasing in the design stage with the computer simulations. Especially it is very important to evaluate the safety of the navigation in harbor because some skilfull ship operations such as short turning, parallel shifting, course keeping and so forth are carried out in restricted area. The hydrodynamic forces acting on the hull are small because the ship speed is slow in the harbor waterways. But the rudder force and the propeller force vary with the propeller load, and they become dominant for the maneuvering motion under the high propeller load condition. Therefore it is necessary to estimate precisely the rudder force and the propeller force under the various propeller load conditions. In this paper, some mathematical models are presented to evaluate the rudder force and the self-propulsion factors such as thrust deduction and wake under widely changing the propeller load condition due to the maneuvering motion in harbor. Some computer simulations about the short turning with engine and steering operation are carried out with above mathematical models. And these results show a good agreement with the experimental results.
社団法人日本船舶海洋工学会の論文
1989-09-25