Type of Document Master's Thesis Author Dewi, Jr., Fata Dwi Endyana Jr. Author's Email Address email@example.com URN etd-11197-171225 Title Three-Dimensional Analysis of Wave Attenuation by Anchored Hemicylindrical Shell Degree Master of Science Department Aerospace and Ocean Engineering Advisory Committee
Advisor Name Title Fortune, Jimmie C. Fu, Victoria R. McDaniels, Carl O. Neu, Wayne L. Plaut, Raymond H. Liapis, Stergios I. Committee Chair Keywords
Date of Defense 1997-08-27 Availability unrestricted AbstractThe performance of a flexible structure as a breakwater is investigated numerically.
The structure is a hemicylinder and is filled with water of uniform pressure. It is anchored
along the sides. Only flexural modes are present.
The structure is modeled as an elastic shell using the finite element program
ABAQUS. The fluid is assumed to be inviscid and incompressible. The fluid flow is
analyzed using a boundary integral method and the integral equation is solved numerically
by a panel method.
The vibration characteristics of the structure are analyzed both in the absence and
presence of water. The hydrodynamic coefficients, forces, and the dynamic response of the
structure in waves are obtained as a function of the wave number. Two different water
depths of 5 m and 6 m are considered. For each water depth, normal and oblique incident
waves are considered. The free surface elevation in front of and behind the structure is
evaluated for different wave frequencies and directions. The results indicate that the
flexible structure is effective in reducing the incident wave intensity over a wide range of
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