The consistent second-order theory of wave/structure interaction
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Authors
Garrison, Clarence Jimmy
Subjects
wave/body interaction
wave forces
nonlinear wave forces
Green's function
wave forces
nonlinear wave forces
Green's function
Advisors
Date of Issue
1979-09
Date
1979-09
Publisher
Monterey, California. Naval Postgraduate School
Language
en_US
Abstract
The consistent second-order theory of the interaction of regular gravity waves with a fixed object in water of finite depth is developed. The theory is carried out for the most general case of a body of arbitrary shape which may extend through the free-surface or be completely immersed. The incident wave evolves in the development as a second-order Stokes' wave. Boundary-value problems are established for both the first- and second-order velocity potentials and a numerical method based on the Green's function is outlined. The determination of forces exerted by gravity waves on large structures immersed in the sea has become of great practical interest in recent years. for example, in the design of bottom-mounted oil storage facilities or large ocean caissons, the wave-induced horizontal and up-lift forces and overturning moments are factors of primary importance. The effect of large amplitude waves in particular is of importance in the determination of the permanence of an ocean structure and, therefore, a higher-order theory appears to have significant practical value. For example, Apelt and Macknight (1976) found measured forces on a ocean caisson model in fairly large-amplitude shallow-water waves to be considerably in excess of calculations based on linear diffraction theory
Type
Technical Report
Description
Series/Report No
Department
Identifiers
NPS Report Number
NPS-69-79-010
Sponsors
National Science Foundation
Funder
NSF Grant No.
ENG 73-04019 A01
Format
Citation
Distribution Statement
Rights
This publication is a work of the U.S. Government as defined in Title 17, United States Code, Section 101. Copyright protection is not available for this work in the United States.