大振幅船体運動の実用的計算法に関する研究

概要

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It is generally known that linear theory such as Strip Method is widely used to predict seakeeping performance of a ship. In spite of the small wave amplitude assumption in linear theory, it is proved that through model tests, actual sea tests and so on, linear theory can also be applicable for relatively high wave condition. However,under the extremity high wave conditions close to the operation limit of ships, linear theory cannot predict accurately ship motions, added resistance in waves, etc. In this research, a calculation method of six-degree of ship motions and added resistance in waves is developed and named "Practical Large Ship Motion Analysis (PLASMA)". The feature of the method is practical calculation time in such high wave case. In this paper, the outline of the calculation method "PLASMA"is presented first, then some calculation results of ship motions and added resistance in waves of SR108 (S175) container ship in regular and irregular waves are shown. Finally, by comparing calculation results of "PLASMA" both with those by linear theory and towing tank test results, availability of "PLASMA"is shown.
社団法人日本船舶海洋工学会の論文
2004-03-25