Theoretical Study on Wave-Induced Pressure and Drift Force on a Vertical Circular Column

With a vertical circular cylinder with infinite draft taken as simplified model of spar-buoy type offshore wind turbine, review theoretical analyses for the linear diffraction problem and second-order wave drift force is provided. For solution velocity potential, it confirmed that Bessho’s analytical method an integral equation in source distribution provides same result by eigenfunction expansion method. force, near-field far-field methods are reviewed, showing explicit-form can be obtained. Then, also shown applying Lagally’s theorem gives furthermore, Tsubogo’s calculation formula given reciprocal form on body surface regarded theorem. As consequence, proven exactly obtained even from expression.