Wave transmission through multilayered porous breakwater under regular and irregular incident waves

摘要

In the present study, normal incident wave scattering by a surface-piercing multilayered porous trapezoidal breakwater is analyzed under the assumption of linearized water wave theory. The different layers of the breakwater consist of rubble of different sizes and having different structural properties. To solve the physical problem, a coupled eigenfunction expansion-boundary element method is used. The solution technique is computationally efficient and can handle easily the arbitrary shape of the breakwater. Both the regular and irregular incident waves are considered. Numerical results are compared with the standard experimental and theoretical results available in the literature. Several physical quantities of interests are plotted and discussed for a variety of wave and structural parameters.