係留浮体の波浪中強制動揺試験について(第2報)

概要

論文の詳細を見る
The previous paper showed results of slow motion forced oscillation tests in regular waves concerning slow drift oscillation of a floating body moored in random seas. Systematic combinations of waveheight, wave frequency, motion amplitude and motion frequency were chosen as test parameters. In equation of hydrodynamic forces which is used for analysis of the measure forces, wave orbital velocity is taken into account in relative velocity to the model in Morison's drag term in this paper, although it was neglected in the previous one. Obtained results of wave drift damping are in much better agreement each others than the previous ones, although waveheight, wave frequency, motion amplitude and motion frequency are different for them. In addition to a box-shape barge which is tested in the previous paper, tanker and semi-submersible models are newly tested. This paper shows the results of wave drift dampings for these three models as well as drag coefficient increases for them due to waves. Drag coefficient increases due to waves for a tanker and a box-shape barge are less important than those for a semi -submersible.
社団法人日本船舶海洋工学会の論文