走錨危険指数から見た錨泊の設計指針 : 双錨泊の安全性検討

概要

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In the previous paper, the risk-index which can show numerically the risk level of dragging anchor was introduced. In this paper, we discuss about the safety measures of the mooring at two anchors such as the angle between anchor cables and the length of anchor cable to be paid based on the proposed risk-index. As the results, the desirable angle between anchor cables is from 50 to 60 degrees when the wind comes perpendicular to the line which connects each points of the two anchors. Under these conditions, the risk-index shows the value less than 30% and the safe anchoring can be kept. If the wind angle changes, the safety level of anchoring rapidly reduces. The diagrams are provided illustrating the equal risk potential conditions of a dragging anchor as guidelines of safe anchoring. These diagrams allow us to find the length of anchor cable required to ensure safety in relation to the wind force.
社団法人日本航海学会の論文
1995-03-25