短錨鎖における走錨抵抗 : アンカーの把駐性に関する実験研究その4(日本航海学会第28回講演会)

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タイトル別名
  • The Holding Power of The Ground tackle at Short Scope
  • 短錨鎖における走錨抵抗 アンカーの把駐性に関する実験研究-4-
  • タンビョウサ ニ オケル ソウビョウ テイコウ アンカー ノ ハチュウセイ ニ カンスル ジッケン ケンキュウ 4

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抄録

The objects of the work summerized in this paper were to investigate on the relation of the anchor holding power to pulling speed and on the dragging force of an anchor at short scope. Experiments on model JIS-anchors were held in new tank with sea sand bottom. As model experimental results we found that the increase of pulling speed made the holding power strong, and we can explanate such results as the effect of dilatancy in Soil Mechanics. Therefore, ship maneuverer should avoid the snubbing by the bower with too much headway on when come to, and also should consider that the dragging force of at short scope with little way on will be 1.5 to 2.0 times the anchor weight if the length to be veered cable is 1.5 to 2.0 times the height of hawsepipe on sea bottom, and that the probability of imparting to the anchor trip will be much more provided that the length is over 3 times its height.

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