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Effects of wave directionality on the in-line loading of a vertical cylinder

Effects of wave directionality on the in-line loading of a vertical cylinder
Effects of wave directionality on the in-line loading of a vertical cylinder
This paper presents results from an experimental investigation into the loading on a rigid vertical circular cylinder in irregular unidirectional and multidirectional waves in water of uniform depth. The ambient flow at the location of the cylinder was measured directly using perforated-ball velocity meters (PVMs), in order to avoid uncertainties associated with the use of wave theories.
Reynolds numbers were in the range of 104 to 7 X 104, and Keulegan-Carpenter numbers ranged from o to 16. In-line Morison coefficients and root-mean-square force coefficients are estimated from the loading measured on force sleeves at three elevations along the length of the cylinder. Results are presented for the probability distributions of forces and peak forces, and for Morison and rms force coefficients. Effects of wave directionality are compared with Dean's analytical predictions.
1053-5381
206-211
Chaplin, John R.
d5ed2ba9-df16-4a19-ab9d-32da7883309f
Subbiah, Kesavan
91fc4e71-3a90-4b78-bdb2-69ca85e283a2
Irani, Mehernosh
45f35e71-35ca-4bec-a644-15b0d0354cd4
Chaplin, John R.
d5ed2ba9-df16-4a19-ab9d-32da7883309f
Subbiah, Kesavan
91fc4e71-3a90-4b78-bdb2-69ca85e283a2
Irani, Mehernosh
45f35e71-35ca-4bec-a644-15b0d0354cd4

Chaplin, John R., Subbiah, Kesavan and Irani, Mehernosh (1994) Effects of wave directionality on the in-line loading of a vertical cylinder. International Journal of Offshore and Polar Engineering, 4 (3), 206-211.

Record type: Article

Abstract

This paper presents results from an experimental investigation into the loading on a rigid vertical circular cylinder in irregular unidirectional and multidirectional waves in water of uniform depth. The ambient flow at the location of the cylinder was measured directly using perforated-ball velocity meters (PVMs), in order to avoid uncertainties associated with the use of wave theories.
Reynolds numbers were in the range of 104 to 7 X 104, and Keulegan-Carpenter numbers ranged from o to 16. In-line Morison coefficients and root-mean-square force coefficients are estimated from the loading measured on force sleeves at three elevations along the length of the cylinder. Results are presented for the probability distributions of forces and peak forces, and for Morison and rms force coefficients. Effects of wave directionality are compared with Dean's analytical predictions.

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Published date: September 1994

Identifiers

Local EPrints ID: 75360
URI: http://eprints.soton.ac.uk/id/eprint/75360
ISSN: 1053-5381
PURE UUID: 79a23710-747c-43be-8240-3215e141f01a
ORCID for John R. Chaplin: ORCID iD orcid.org/0000-0003-2814-747X

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Date deposited: 11 Mar 2010
Last modified: 22 Feb 2024 02:35

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Contributors

Author: John R. Chaplin ORCID iD
Author: Kesavan Subbiah
Author: Mehernosh Irani

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