A study of gate-type wave attenuators

Abstract

A new type of gate structures for harbour entrances is proposed in this paper . The principal objective of the proposed structures is provide protection from incident wave fromthe outer harbour in rough condition, thus creating a inner area of calm water for the mooring of small boats. The bottom hinged flap type was proposed as one of the typical structures and the side hinged double flaps type was proposed for shallow water for not be an obstacle of boat passage .It was evaluated the wave attenuation characteristics and the forces from wave loading of the structures by numerical analysis comparing with physical model test results .