Hydrodynamic damping of the vertical motion of a horizontal cylinder beneath waves at large scale
Hydrodynamic damping of the vertical motion of a horizontal cylinder beneath waves at large scale
Large-scale laboratory measurements are presented of the hydrodynamic damping of the vertical oscillations of a circular cylinder beneath waves, where the wave crests are parallel to the cylinder axis. In two series of tests, the Stokes parameter ? was 647 000 and 997 000, and the Keulegan Carpenter number of the cylinder motion was in the range 0·01–0·1. Observations of the decaying motion of the cylinder, and of steady-state oscillations generated by continuous force excitation, were in reasonable agreement with the vector form of the relative velocity Morison equation with constant coefficients. In some conditions, the motion of the cylinder became phase locked to the wave-induced flow, at an integer frequency ratio.
929-940
Chaplin, J.R.
d5ed2ba9-df16-4a19-ab9d-32da7883309f
Retzler, C.H.
17235f7e-0179-4490-bb17-ec8d274965ac
October 2001
Chaplin, J.R.
d5ed2ba9-df16-4a19-ab9d-32da7883309f
Retzler, C.H.
17235f7e-0179-4490-bb17-ec8d274965ac
Chaplin, J.R. and Retzler, C.H.
(2001)
Hydrodynamic damping of the vertical motion of a horizontal cylinder beneath waves at large scale.
Journal of Fluids and Structures, 15 (7), .
(doi:10.1006/jfls.2001.0391).
Abstract
Large-scale laboratory measurements are presented of the hydrodynamic damping of the vertical oscillations of a circular cylinder beneath waves, where the wave crests are parallel to the cylinder axis. In two series of tests, the Stokes parameter ? was 647 000 and 997 000, and the Keulegan Carpenter number of the cylinder motion was in the range 0·01–0·1. Observations of the decaying motion of the cylinder, and of steady-state oscillations generated by continuous force excitation, were in reasonable agreement with the vector form of the relative velocity Morison equation with constant coefficients. In some conditions, the motion of the cylinder became phase locked to the wave-induced flow, at an integer frequency ratio.
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Published date: October 2001
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Local EPrints ID: 53962
URI: http://eprints.soton.ac.uk/id/eprint/53962
ISSN: 0889-9746
PURE UUID: 766f61e1-c4cb-4636-858e-7bbe17b4249b
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Date deposited: 22 Jul 2008
Last modified: 16 Mar 2024 03:13
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Author:
C.H. Retzler
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