The Focusing Waves Induced by Bragg Resonance with V-Shaped Undulating Bottom

Intensive wave reflection occurs when the wavelengths of incident waves and bottom undulations are in a 2:1 ratio. Existing studies have included Bragg resonance phenomenon passing over continuous undulating parallel to oblique shoreline. More generally, mechanism is used as means coastal protection, rather than power generation. To focus energy specific area, here, we propose sinusoidal sandbars horizontal V-shaped pattern, which formed by two bottoms inclined at an angle each other center axis perpendicular Based on high-order spectral (HOS) numerical model, both characteristics induced regular random investigated. In scenario waves, it shows that wave-focusing effect related bottom, optimal inclination for 162.24°. On basis, considering interactions between 162.24°, studied. The BFI factor combining steepness spectrum width can evaluate focusing intensity waves. For BFI, range 0.15–1.0, values Hsmax/Hs0 linearly increase with BFI.