コンテナ船の波浪中推進性能に関する研究 (第4報)

概要

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With a ship model of single screw high speed container ship, resistance and self-propulsion tests in irregular head waves are carried out in the Experiment Tank of Osaka University. The significant wave height and the mean wave period of irregular waves are changed systematically. The significant amplitudes of heave, pitch and surge, and the mean increases of resistance, propeller thrust, torque and revolutions measured in irregular waves are compared with the values which are predicted from the response amplitude operators obtained by the experiments in regular waves and the wave spectra by applying the linear superposition method. The self-propulsion factors in irregular waves are analysed by the thrust identity method. To investigate the characteristics of self-propulsion factors in waves, the inflow velocity at the propeller disc in regular waves are measured by using a ring type wake meter, and the wake fraction, relative rotative efficiency and propeller open efficiency in regular waves are calculated by using the measured inflow velocity and propeller revolutions, and the propeller open characteristics based on the blade element theory.
社団法人日本船舶海洋工学会の論文
1975-12-30