Many kinds of buoyant offshore structures such as wave energy converters (WECs) and weather buoys are being utilized to capture energy from the sea, protect coastal lines and study marine meteorology.
Since these structures often work for a long period of time, mooring systems are adopted to maintain their original positions, which is related to wave diffraction.
Rim Un Ryong, a researcher at Faculty of Shipbuilding and Ocean Engineering, has developed a novel DtN condition on a lateral cylindrical surface to solve three-dimensional wave diffraction by arbitrary-shaped floating bodies in water of finite depth.
First, he formulated wave diffraction with an artificial cylindrical boundary and derived a DtN condition on the artificial boundary.
Then, from the given boundary conditions, he solved wave problems numerically by implementing BEM and obtained the results for a chamfer box and their array.
The result showed that in the case of a single box, the plots for the amplitudes of heave and surge forces according to the incident wave direction have minimal values in the vicinity of the points in which the length of the box is integer times larger than the incident wavelength.
Besides, they witnessed more fluctuations for an array of the boxes than in the case of a single box, and the amplitude of surge force on the box became larger in the case of having other objects around it.
He presented his essay titled “Wave diffraction by floating bodies in water of finite depth using an exact DtN boundary condition” to SCI journals “Ocean Engineering”.
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