縦揺れ制止ひれによる船の動揺軽減について (続報)

概要

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In the preceding report, we have confirmed theoretically and experimentally that there exists appropriate fins to suppress heaving and/or pitching motion at designated wave length in head sea. However, the area of such fin becomes fairly large so that practical application may be difficult. This report deals with this point, that is, upon which particulars of ship form the fin area depends and the possibility to reduce its area. For this purpose, we derive nine models from the container ship considered in the preceding report preserving its prismatic curve unchanged and changing its water plane area, moreover, for comparison sake, take up Series 60's cargo and tanker and a destroyer model. At first, fin particulars to suppress pitching motion at each wave length are calculated and selecting appropriate one of fins so obtained, the wave-exciting force and moment, heaving and pitching motions and resistance increase in head sea are calculated in both cases with and without fin. The effect of antipitching fin obtained is satisfactory like as in the former report. The necessary fin area becomes smaller, the water plane area smaller.
社団法人日本船舶海洋工学会の論文