実船実験による守錨基準の検討と錨泊状態モニタ装置の提案

概要

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Full-scale experiments in stormy weather are performed to investigate eight-figure horsing movement (horsing) of a ship at single anchor, cable tension caused by the horsing, the movement of the ship at dragging anchor and the effect of secondary short-scope anchor to reduce horsing. Test ships are 5,800 G.T. Training Ships. And based on the results of these experiments, we propose the Standards for safe anchoring and the new monitoring system for anchoring utilizing PC, DGPS and anemometer. The main results of experiments are as follows. (1) A ship at single anchor starts horsing at wind velocity 10m/s and the shock load caused by horsing act her cable. Ship sheer violently back and forth across the wind over 16m/s (wind velocity) and the shock load increase remarkably. (2) The secondary short-scope anchor is very effective to reduce horsing in stormy weather. (3) For the prevention of disaster caused by dragging anchor, it is important to establish the Standards of anchoring and anchor watch and keep anchor watch strictly according to the Standards. (4) Proposed method to establish the Standards of anchoring and anchor watch is effective to prevent the accidents by dragging anchor. (5) Proposed monitoring system is useful and effective to support the anchor watch for the prevention of dragging anchor.
社団法人日本航海学会の論文
2003-03-25