Abstract
Reflection and transmission characteristics of regular and random waves from a horizontal thin plate which is fixed at a certain submergence below the water surface, have been investigated. The experimental results are compared with the theoretical solution obtained numerically by the finite-element method using the linear-wave diffraction theory. The optimum conditions of the submerged plate to achieve minimum transmission of the waves, can be deduced from the results. Optimum plate width was found to be about 0.5–0.7 of the wave length above the plate with plate submergence kept at around 0.05–0.15 to induce wave breaking which is the main cause of energy dissipation.
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