Reduction of Wave Transmission through the Use of Radiation Waves by a Floating Breakwat

Considering the phase relationship between the diffracted waves and radiated w00aves by a floating breakwater, an effective method of reducing incoming waves is newly proposed. It was clarified that the phase relationship between the two waves becomes out-of-phase under which the floating breakwater shows a resonant response to wave forces. Consequently transmitted waves can be reduced effectively under the resonant conditions. It was also found out that the resonant condition lasts for a wide range of wave frequency if the floating breakwater has a comparatively deep draft, such as a floating body with deep curtain walls.