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On wave-free floating-body forms in heaving oscillation
AbstractSome wave-free heaving forms are obtained in a manner similar to Bessho's earlier work by using a source and vertical dipole combination to generate bulbous-shaped two and three-dimensional bodies which have zero radiation damping. Then the combinations of higher singularities, such as triple-pole and quadra-pole, are considered. Using the thin-ship approximation, where the boundary condition is satisfied on the centreline, a simple procedure for generating any arbitrary shape that has the same property is established. The existence of wave-free frequencies of such bodies are verified numerically, in two dimensions by a standard singularity-distribution method based on the actual body-contour and in three-dimensions by using vortex-ring distribution for an axisymmetric body. Experiments are carried out for the models obtained theoretically and the results support the theoretical predictions fairly well. Finally, some suggestions are made to apply such a wave-free body to a moored buoy to suppress its heaving oscillation.
On wave-free floating-body forms in heaving oscillation
AbstractSome wave-free heaving forms are obtained in a manner similar to Bessho's earlier work by using a source and vertical dipole combination to generate bulbous-shaped two and three-dimensional bodies which have zero radiation damping. Then the combinations of higher singularities, such as triple-pole and quadra-pole, are considered. Using the thin-ship approximation, where the boundary condition is satisfied on the centreline, a simple procedure for generating any arbitrary shape that has the same property is established. The existence of wave-free frequencies of such bodies are verified numerically, in two dimensions by a standard singularity-distribution method based on the actual body-contour and in three-dimensions by using vortex-ring distribution for an axisymmetric body. Experiments are carried out for the models obtained theoretically and the results support the theoretical predictions fairly well. Finally, some suggestions are made to apply such a wave-free body to a moored buoy to suppress its heaving oscillation.
On wave-free floating-body forms in heaving oscillation
Kyozuka, Yusaku (author) / Yoshida, Kiyotaka (author)
Applied Ocean Research ; 3 ; 183-194
1980-07-30
12 pages
Article (Journal)
Electronic Resource
English
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