10 On a Calculation of Decrease of Ship Speed in Actual Seas

概要

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Reduction of green house gas from international shipping shall be put forward. For the reduction, it is important to promote to introduce ships of high energy efficiency to the shipping market. In actual seas a ship decreases her speed not only the deterioration and fouling effect but also by natural forces such as winds and waves. By design technique, ship propulsive performance in actual seas is able to improve. Hence ship propulsive performance in actual seas has much scope to improve the energy efficiency. We present a calculation method of decrease of ship speed in actual seas. From the point of accuracy, the method involves correction for added resistance in short waves combined with a tank test. As examples three kind of ship; a container ship, a car carrier and a bulk carrier are examined and the components of external forces acting on the ship are discussed.
社団法人日本船舶海洋工学会の論文