単錨泊船の振れ回り運動中に生じる錨鎖張力の緩和に関する研究-II : バウスラスターを利用した錨鎖張力の緩和

概要

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The author tried to evaluate by means of simulation that to what degree cable tension can reduce through the effect of bow thruster which was operated so as to lessen the difference of the angle between the direction of the wind and the ship's head. The results of the simulation showed that not only cable tension but also the extent of swing motion reduced significantly by application of bow thruster, and gave us some instructions regarding the operation of bow thruster as follows; (1) The degree of the effect is not concerned in the starting point of operation of bow thruster. (2) It is not desirable to do so sensitive control for the small difference of the angle between the direction of the wind and the ship's head. (3) In the present condition, it is suitable to permit the steady swing motion to some extent, in this sense, the adequate magnitude of the thrust of bow thruster seems to be 60〜80% of the frontal wind pressure of the ship. (4) Then, it is expected that the magnitude of cable tension decreases by about 40%, and the extent of swing motion decreases by 35% at least.
社団法人日本航海学会の論文
1982-02-25