Edge Radiation from a Semi‐Infinite Fluid‐Loaded Plate

An infinite, isotropic, elastic plate surrounded by a heavy fluid is analyzed from two types of harmonic loading: (i) a uniform line force, and (ii) a uniform line moment. Approximate expressions for the plate displacements or rotations under the loads are obtained. It is then indicated how these two types of loading may be combined to simulate a clamped or simply supported edge for a semi‐infinite fluid‐loaded plate, when a harmonic bending wave on the plate approaches the edge at normal incidence. The power radiated by the edge is then estimated from the power radiated by the line force and line moment. It is shown that increased fluid loading has two counteracting effects on the power radiated by the edge: (1) the line force or moment reaction of the edge to a given incident wave increases, and (2) the power radiated by a given line force or moment decreases.