Diffraction and Radiation of Waves Due to Two Vertical Flat Plates

Abstract

Two problems are calculated by the "Joining Method of Divided Regions". The one is the diffraction wave through two vertical flat plates. The another is the radiation wave produced by the sinsoidal pressure fluctuation acted on the free surface between two vertical flat plates. These results are compared with those by an approximate method in which the vertical motion of fluid column between the plates is replaced by the rigid body motion. The agreement of these two methods is fairly good, if the distance between the plates is the same order as the draft. The discrepancy between the calculation and experiment is remarkable in the diffraction problem in the vicinity of a wave length where the motion of the fluid column between the plates is resonant.