Research Article
Aug 1969
Damping Effect of Floating Breakwater
Authors: Juichi Kato, Toshifumi Noma, Yukio Uekita, and Seiya HaginoAuthor Affiliations
Publication: Journal of the Waterways and Harbors Division
Volume 95, Issue 3
Abstract
The results of experimental studies are presented concerning the mechanism of attenuation of waves and the damping effect of the floating breakwater to which the system of phase difference is applied is shown. As the floating body rolls responding to the incident wave and simultaneously is forced by mooring ropes, so the phase difference between motion of the floating body and the incident waves occurs. Four basic shapes, inverse trapezoid, trapezoid, rectangle and triangle, are adopted for the cross section of floating breakwater. The models of floating body are moored to the bottom with the mooring ropes 2.5 times as long as the water depth. A moored floating breakwater with an inverse trapezoid in cross section highly susceptible to roll when freely floating has a high damping effect when the ratio of the natural rolling period of the floating breakwater to the wave period is unity.
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Published In
Journal of the Waterways and Harbors Division
Volume 95 • Issue 3 • August 1969
Pages: 337 - 344
Copyright
© 1969 American Society of Civil Engineers.
History
Published in print: Aug 1969
Published online: Feb 12, 2021
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Authors
Affiliations
Juichi Kato
Head of Third Lab. of Fisheries Engrg., Agricultural Engrg. Rese arch Sta., Ministry of Agriculture and Forestry, Hiratsuka, Japan
Toshifumi Noma
Member of Third Lab. of Fisheries Engrg., Agricultural Engrg. Research Sta., Ministry of Agriculture a nd Forestry, Hiratsuka, Japan
Yukio Uekita
Member of First Lab. of Fisheries Engrg., Agricultural Engrg. Research Sta., Ministry of Agriculture and Forestry, Hiratsuka, Japan
Seiya Hagino
Member of Third Lab. of Fisheries Engrg., Agricultural Engrg. Research Sta., Ministry of Agriculture and Fore stry, Hiratsuka, Japan
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