Numerical study on a new floating breakwater with openings, arc-shaped wings, and plates using the SPH method

Abstract

Recently, a novel floating breakwater design featuring openings, arc-shaped wings, and plates was proposed to enhance wave attenuation performance for medium-to long-period waves. While this innovative floating breakwater demonstrated significant capacity to attenuate waves, research gaps remained regarding its wave attenuation mechanisms and critical structural parameters. To address these aspects, a numerical study using the Smoothed Particle Hydrodynamics (SPH) method was conducted. The numerical model was validated and showed good capability in simulate wave-floating breakwater interaction. By analyzing the velocity and vorticity fields, the wave attenuation mechanisms of this new floating breakwater were revealed. The primary mechanisms include wave energy dissipation and wave reflection. By comparing the transmitted wave elevations, the wave attenuation performance of this new floating breakwater with varying horizontal plate heights was examined. The numerical results indicate that the horizontal plate height and the wave conditions directly affect the wave attenuation mechanisms and overall performance. This study provides deeper insights into wave attenuation mechanisms and contributes to further innovation in floating breakwater designs. The parameter study offers valuable evidence for optimizing the design of this new floating breakwater to suit specific wave conditions effectively.