Author(s)

M Kanoh, H Okuzonol, N Nakamural, T Kuroki & H Power

Abstract

We presented the boundary element analysis of large amplitude of water motion of incident waves against a permeable submerged breakwater. In our boundary element analysis, a wave model based on fully nonlinear potential flow equations was applied to the study of the wave motion of incident waves against trapezoidal submerged breakwaters by using the moving boundaries for the free surface. In order to present a design for an optimum submerged breakwater to dissipate the energy of incident waves, we propose m alternative quadrilateral submerged breakwater such that energy dissipation can be effectively caused by the motion of the water, which passes through the porous or perforated layer of the water chamber. We introduce the boundary conditions regarding the vertical and horizontal permeable layers of the water chamber. These boundary conditions and the effect of quadrilateral submerged breakwaters are estimated by using experimental models in our laboratory and our boundary element analysis in the paper.

Keywords