Hydrodynamic Interaction of Flexible Structures
Publication: Journal of Waterway, Port, Coastal, and Ocean Engineering
Volume 111, Issue 4
Abstract
In order to investigate the nature of hydrodynamic interaction on multiple, flexible structures subjected to earthquake ground motion, a numerical analysis for determining the hydrodynamic forces and the corresponding structural responses on three‐dimensional offshore structures is presented. With the assumption of potential flow, the finite element method is developed to solve the boundary value problem in the fluid domain. If the structures have uniform cross sections in the vertical direction, the problem can be reduced to a two‐dimensional one. Moreover, the principle of symmetry and antisymmetry can also be applied to the problem to reduce the fluid domain such that the computation becomes much more efficient. A computer program is developed to analyze the structural behavior according to the aforementioned approach. From the results of the examples presented, we arrive at the conclusion that hydrodynamic interaction is relevant if the structures are in close proximity. This phenomenon depends on the characteristics of structures, water depth, distance between structures, excitation frequency, amplitude of ground motion, and the direction of excitation.
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Published In
Journal of Waterway, Port, Coastal, and Ocean Engineering
Volume 111 • Issue 4 • January 1985
Pages: 719 - 731
Copyright
Copyright © 1985 ASCE.
History
Published online: Jan 1, 1985
Published in print: Jan 1985
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