HYDROGRAPHIC PHENOMENA ESTIMATION APPARATUS AND HYDROGRAPHIC PHENOMENA ESTIMATION METHOD

摘要

A sea state estimation device includes: a time history memory unit which stores a time history of ship motion data relating to a rolling angle, a pitching angle and a heaving displacement of a ship; a hull condition data calculation unit which calculates current hull condition data of the hull based on the time history of the ship motion data stored in the time history memory unit; a cross spectra calculation unit which calculates cross spectra of respective ship motions consisting of rolling, pitching and heaving of the hull based on the time history of the ship motion data stored in the time history memory unit; a hull response function calculation unit which calculates a hull response function based on the hull condition data calculated by the hull condition data calculation unit; and a sea state estimation unit which estimates a sea state in sea on which the hull is running based on the cross spectra of the respective ship motions calculated by the cross spectra calculation unit and the hull response function calculated by the hull response function calculation unit.