SPH MODELING OF HEAVE MOTION RESPONSE OF FLOATING BREAKWATER

The interaction of sea waves and floating bodies is one of the most pioneering fields of study in marine technology. Floating breakwater (FB) is one of the most utilized types of these structures which can be also used in the conditions rather than shallow water, insufficient sea beds and high sedimentation rates in typical wave climateswhere there is no need to full protection. In this article, the heave motion response of a single degree of freedom FB was studied. To describe the momentum equation, the laminar viscous stress model and to overcome the pressure oscillation of WCSPH method, the Shepard density filter was used. Also, three different weighting functions including Gaussian, Cubic Spline and Quintic (wendland) were compared. Validation of the results was made by comparison of the obtained data to experimental and numerical work of Ruol and Martinelli [1]. The results demonstrated that the Cubic Spline and Quintic weighting functions are more appropriate to the problem of the interaction of waves with the considered structure. The velocity field near the FB showed that the velocity of water particles is maximum near the sharp edges of the body.