Wave trapping by porous and flexible barriers

摘要

The trapping of surface waves by submerged vertical porous and flexible barriers near the end of a semi-infinitely long channel of finite depth is investigated. The barrier configurations include a bottom-touching barrier and a surface-piercing barrier. For the bottom-touching barrier, the barrier is clamped at the bottom and is free at the upper end. While for the surface-piercing barrier, the barrier is clamped by a structure above the free surface and is free at the lower end inside the water. By matching the velocity and pressure along the barrier and along the gap and using the edge conditions, the full solutions are obtained.