Wave attenuation and focusing by a parabolic arc pontoon breakwater

In the multifunctional system consisting of point absorber wave energy converters and a pontoon breakwater, breakwater plays an essential role in attenuating waves on lee side amplifying for better harvesting stoss side. The structure is expectedly improved to enhance its attenuation amplification at same time. Here we present novel parabolic arc show that range typical regular incident waves, it can attenuate more elevation focus high several regions comparison straight breakwater. further frequency-domain investigations, special relatively-low frequency associated with configuration found named as critical frequency, closed which splendid focusing performance be achieved. A systematic parametric study geometric factors (draft, width, chord length) thereafter carried out examine their influence frequency. We find increase draft reduce greatly so let within real sea states, meanwhile slightly affecting performance. An length has uncertain but not large performance, whereas enhances substantially Simultaneously, rate up 3.06 two relatively-large focal areas prescribed deployment zone average approximately 68% protection could obtained commonly observed coastal wave.