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Heave response of a classic spar with variable geometry

Lookup NU author(s): Professor Longbin Tao

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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.

Publication metadata

Author(s): Tao L, Lim KY, Thiagarajan K

Publication type: Article

Publication status: Published

Journal: Journal of Offshore Mechanics and Arctic Engineering, ASME

Year: 2004

Volume: 126

Issue: 1

Pages: 90-95

Print publication date: 01/02/2004

Date deposited: 18/06/2010

ISSN (print): 0892-7219

ISSN (electronic): 1528-896X

Publisher: ASME International

URL: http://dx.doi.org/10.1115/1.1643085

DOI: 10.1115/1.1643085

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