Heave Response of Classic Spar With Variable Geometry-Reference-Cited by-同舟云学术

Heave Response of Classic Spar With Variable Geometry

Published:2004-02-01 Issue:1 Volume:126 Page:90-95
ISSN:0892-7219
Container-title:Journal of Offshore Mechanics and Arctic Engineering
language:en
Short-container-title:

Author:

Tao Longbin¹,Lim Kay Yeong²,Thiagarajan Krish³

Affiliation:

1. School of Engineering, Griffith University, Gold Coast, QLD 9726, Australia

2. Worley Ltd., Perth, Australia

3. School of Oil and Gas Engineering, The University of Western Australia, Crawley, WA 6009, Australia

Abstract

Spar platforms with cylindrical shape and constant cross-section area may experience resonant heave motions in sea states with long peak periods, which are probably excessive for riser integrity due to its low damping and relatively low natural heave period. Changes to hull shape and cross-section that produce more benign heave behavior were discussed by some researchers in the past. In this study, the viscous damping of spar structures is explicitly calculated, and incorporated to the potential solution. It is concluded that the heave resonant response can be considerably reduced by alternative hull shapes via increased damping mechanism and the natural heave period being kept outside the range of the wave energy.

Publisher

ASME International

Subject

Mechanical Engineering,Ocean Engineering

Link

http://asmedigitalcollection.asme.org/offshoremechanics/article-pdf/126/1/90/5507003/90_1.pdf

Reference10 articles.

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2. Tao, L., Cheng, L. and Thiagarajan, K., 1999, “Numerical estimation of hydrodynamic heave damping of a vertical cylinder with appendages,” Proceedings of the Ninth International Offshore and Polar Engineering Conference, Vol III, 490–495.

3. Tao, L., Thiagarajan, K., and Cheng, L., 2000, “On the parametric dependence of springing damping of TLP and Spar columns,” Appl. Ocean. Res., 22(5), pp. 281–294.

4. DNV, 1993, SESAM User’s Manual—WADAM, Det Norske Veritas.

5. Lee, C.-H., 1995, “WAMIT Theory Manual,” Report 95-2, Dept. of Ocean Engineering, MIT.

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