2004 Volume 20 Pages 1305-1310
The field measurement of moored ship motions is necessary to decrease troubles in cargo handling. But it was difficult to measure ship motions accurately by using accelerometer.
In this paper, a 3D PTV algorithm is applied to field observation of moored fishing boat motions. As a result, six-directional ship motions are measured accurately. This observation shows that heaving, rolling and pitching have only one energy peak which is the same period as energy peak of sea wave. Surging, swaying and yawing have two energy peaks, and the energy of peak in long period is higher than the energy of peak in short period. These two peaks are the same period as peaks of sea wave.
