荒天錨泊中における船体の振れ回り抑止実験(商船・理工論)

概要

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Some powerful typhoons are approaching and hitting directly to mainland of Japan every year. Before and after typhoon passing, miserable and extensive marine disasters that related to anchoring have occurred in the past. To secure a safe anchor riding under stormy weather, the captain judges to use both bower anchors for reinforce the holding power or judges to use a single anchor with dropping another bower as a short-scope anchor. If the swing control of a ship can be done, the wind pressure can be reduced. Then, the ship will maintain a safe anchor riding. Training ship Fukae-maru, the graduate school of maritime sciences, Kobe University, adopts CPP (Controllable Pitch Propeller) as a propulsion system. So, she can control the propeller thrust, ahead and astern, easily. Various experiments using propeller thrust to control the ship swing were done. As a result of the analysis, the suitable astern thrust was effective to control the swing because of the reduction of swing room and wind pressure. The authors are expecting that this analytical result will be useful as one example to control the swing of a CPP ship under stormy weather.
神戸大学の論文