Research Article
Nov 1977
Free Vibrations of Taut and Slack Marine Cables
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VIEW THE REPLYAuthors: Steven E. Ramberg and Owen M. GriffinAuthor Affiliations
Publication: Journal of the Structural Division
Volume 103, Issue 11
Abstract
The natural frequency and damping of several typical marine cables were measured in air and in water and are reported in this paper. The changes in natural frequency and mode shape that occur in both media as the cable sags from a taut configuration are in agreement with a recently developed linear theory. A modal crossover predicted by the theory was also observed as the cable tension was decreased. The onset of the catenary behavior has been identified and it coincides with at least an order of magnitude increase in the structural damping of the cables. The fluid dynamic contributions to the virtual mass and the damping are found to be independent of the sag in the cable and are comparable to measurements for taut cables reported in the literature.
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Published In
Journal of the Structural Division
Volume 103 • Issue 11 • November 1977
Pages: 2079 - 2092
Copyright
© 1977 American Society of Civil Engineers.
History
Published in print: Nov 1977
Published online: Feb 1, 2021
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Steven E. Ramberg
Research Engr., Naval Research Lab., Washington, D.C.
Owen M. Griffin
Research Engr., Naval Research Lab., Washington, D.C.
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