制限水路における船体運動について

概要

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It has been well known since early time that motions of a ship model and hydrodynamic forces acting on her are affected by interference of tank wall due to reflection from tank wall of waves generated by her motions in an experimental long tank. It is an important problem to predict these interferences of tank walls quantitatively in order to know characteristics of ship motions in open sea from an experimental study at a long water tank. It is also necessary to take effect of water depth into account in addition to effect of water breadth, if a long tank is a shallow depth. The condition of restricted breadth and restricted water depth is equivalent to that for an actual ship operating in a canal or a channel. In this paper, we measured radiation forces and wave exciting forces acting on a ship model in a canal and measured amplitudes of ship motions in regular waves. Those experimental results are compared with theoretical ones obtained by so-called "New Strip Method". The reasons for the difference of response curves of ship motions in regular waves between restricted waters and open sea are mostly made clear by experiments and theoretical considerations done in this investigation.
社団法人日本船舶海洋工学会の論文
1978-08-15