Study On Hydrodynamic Characteristics Of Submerged Upper Arc-shape Plate Type Structure

Plate-type breakwater is economic and can be installed in the deep sea reduce the direct wave damage on marine structures, it can also be located on coastal engineering or ports engineering to prevent wave erosion. In this article, a new upper arc-shaped plate type breakwater is investigated. Based on wave radiation and diffraction theory, using the boundary element method (BEM), the hydrodynamic coefficients, motion responses and velocity field analysis of this type breakwater are obtained. It is found that this new type breakwater is more efficient than the other three types breakwater (lower arc-shaped plate, single horizontal plate and double horizontal plates). The effecting of arc angles is also analyzed. It is shown that:(1) When ratio of submergence and wave amplitude is 0.1, the wave elimination effecting will increase 10%than the other three types breakwater.(2) Hydrodynamic coefficients will have an obvious changes when arc angles increase.(3) The obvious backflow is found above the plate in velocity field analysis.