WAVE SCATTERING BY BREAKWATERS WITH POROUS FRONT AND SOLID BACK

摘要

Following the approach used by Penney and Price in 1952, analytical solutions are derived for wave scattering by a semi-infinite breakwater or a breakwater gap with porous front and solid back. The water depth is constant and a regular wave train is normally incident to the breakwater. Wave scattering is studied based on the linear potential wave theory. The governing equation is transformed into ordinary differential equations by using the method of variation of parameters and coordinate transformation. Using the analytic solution, the tranquility of harbor entrance is investigated by changing the reflection coefficient at the breakwater. As expected, the wave height is reduced at the harbor entrance as the wave reflection at the front face of the breakwater decreases.