Title page for ETD etd-11197-171225


Type of Document Master's Thesis
Author Dewi, Jr., Fata Dwi Endyana Jr.
Author's Email Address fatad@fng.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
  • Vibration
  • Inflatable
  • Breakwater
  • Wave
Date of Defense 1997-08-27
Availability unrestricted
Abstract
The 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

frequencies.

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