Abstract
The present paper aims at getting the porous effect parameter G of a thin permeable wall. The reflection and transmission coefficients of a thin vertical porous wall with different porous shapes and porosities are obtained by a physical model experiment. The reflection coefficient and total horizontal wave load on a perforated caisson are also obtained by another experiment. Analytical solutions of wave interaction with these two vertical porous breakwaters are introduced. The reflection and transmission coefficients between predictions and experimental results of authors' and four other researchers' are compared. By comparisons, the estimate methods of the linearized resistance coefficient f and the inertial effect coefficient s of the permeable plate are recommended. Following the formula of Yu [1995], the values of G are calculated by f and s. A complete estimate method of porous effect parameter G is presented, which consists of the formula of Yu [1995] and the present experimental formula. The estimate method of G is validated by comparing the predicted values of the total horizontal wave loads on the perforated caisson with the experimental results.
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