Physical modeling of a floating breakwater with a membrane
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Authors
Hermanson, Michael W.
Subjects
Advisors
McDougal, William
Date of Issue
2003-12
Date
December 2003
Publisher
University of Florida
Language
Abstract
were tested at 8 different wave periods ranging from 0.5 seconds to 1.2 seconds and each test was performed twice. Thus, 72 combinations were examined and approximately 150 flume runs were completed to collect data for this project. The average transmission coefficient for each of the nine cases ranged from 0.705 to 0.853. In all cases tested, the addition of a membrane to the floating breakwater reduced the transmitted wave height relative to the structure with no membrane. The average wave transmission coefficient was 0.85 for the structure with no membrane. The average far all the configurations with a membrane was 0.75, or about a 12% reduction. The most effective membrane configuration gave a reduction of 17%. For the breakwater configurations and wave conditions tested, the following results were observed: (1) a membrane that is 1/4 of the water depth in length is more effective than membrane lengths of 1/2 the depth and the full depth in length, (2) lower transmission was obtained by placing the membrane at the lee side of the structure rather than the front or center, (3) a permeable membrane is more effective than an impermeable membrane, and (4) elastic mooring lines had a lower transmission than stiff moorings. (13 tables, 53 figures, 26 photographs, 16 refs.)
Type
Thesis
Description
This thesis document was issued under the authority of another institution, not NPS. At the time it was written, a copy was added to the NPS Library Collection for reasons not now known. It has been included in the digital archive for its historical value to NPS. Not believed to be a CIVINS (Civilian Institutions) title.
Series/Report No
Department
Organization
University of Florida
Identifiers
NPS Report Number
Sponsors
Funder
Format
75 leaves: ill.
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.