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二機二軸二舵船「鶴洋丸」の旋回性能に関する考察


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タイトル: 二機二軸二舵船「鶴洋丸」の旋回性能に関する考察
その他のタイトル: A Study on the Turning Ability of Twin-engine, Twin-propeller, and Twin-rudder Ship "KAKUYO MARU"
著者: 兼原, 壽生 / 内田, 淳 / 青島, 隆 / 木下, 宰 / 島田, 亜加里 / 高山, 久明
著者(別表記) : Kanehara, Hisao / Uchida, Jun / Aoshima, Takashi / Kinoshita, Tsukasa / Shimada, Akari / Takayama, Hisaaki
発行日: 2009年 3月
出版者: 長崎大学水産学部
引用: 長崎大学水産学部研究報告 v.90, pp.1-7; 2009
抄録: We made the turning trial of "KAKUYO MARU", which was equipped with two engines, two propellers and two rudders, to find out the steady turning diameter, the turning time and the turning speed reduction ratio. The results of trial are stated below.  1) The size of steady turning diameter depended on the rudder angle and was little affected by the turning speed. 2) The ratio of the steady turning diameter to the ship length between perpendiculars (D/L) was inversely proportional to the rudder angle, and its regression formula was expressed as y=20.361x-^l.OOOl. 3) The turning time was inversely proportional to the rudder angle and the turning speed, and its regression formuia at 10 degrees of rudder angle was expressed as y_1O°=453.l7x^-O.6797. 4) The turning speed reduction ratio changed in proportion to the rudder angle and was almost constant even though the turning speed changed. 5) In comparing the measured D/L values by turning speed and rudder angle with Sugihara's nomogram values, the error between measured values and nomogram values was 13.6% at most. Accordingly, Sugihara's nomogram can be applied to a twin-engine, twin-propeller, and twin-rudder ship also. 6) As for the effect of ship's bottom fouling on the turning diameter, the steady turning diameter varied inversely with the period elapsed from the last bottom cleaning in a dock, and its regression formula at 10 and 20 degrees of rudder angle were expressed as y_1O°=-0.6313x^2-0.7471 x +394.8 and Y_20°=-0.6529x^2+4.2921x+189.4 respectively.
キーワード: 定常旋回径 / ノモグラム / 減速率 / Steady turning diameter / nomogram / turning speed reduction ratio
URI: http://hdl.handle.net/10069/22282
ISSN: 05471427
資料タイプ: Departmental Bulletin Paper
原稿種類: publisher
出現コレクション:第90号

引用URI : http://hdl.handle.net/10069/22282

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