Abstract
The boundary integral method is utilized to calculate the hydrodynamic pressure distribution on a rigid submerged cylindrical storage tank subjected to horizontal or vertical harmonic ground excitation. The fluid is assumed to be linearly compressible and to undergo small-amplitude, irrotational motion. The vertical axisymmetry of the structure is exploited utilizing a fluid Green's function which is separable in the cylindrical polar coordinate system and so leads in each case to a line integral equation for the fluid velocity potential on the surface of the structure. Numerical results are presented which illustrate the influence of the direction and frequency of ground motion and the body dimensions on the hydrodynamic pressure distribution. For both horizontal and vertical ground excitation, the numerical values from the boundary integral method have been verified by a comparison with those obtained by an eigenfunction expansion approach.
Published Version
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