A Contribution on Quasi-Static Mooring Line Damping

[+] Author and Article Information
Christian Bauduin, Mamoun Naciri

Single Buoy Moorings Inc., 24 Avenue de Fontvielle, PO Box 199, MC 98007 Monaco Cedex

J. Offshore Mech. Arct. Eng 122(2), 125-133 (Oct 12, 1999) (9 pages) doi:10.1115/1.533734 History: Received July 26, 1999; Revised October 12, 1999
Copyright © 2000 by ASME
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Extreme mooring line configurations during one surge oscillation
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Near, mid, and far mooring line profiles
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Top view of the mooring line positions during one surge oscillation (discretization is here with N=4)
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(a) Mooring line global axes. (b) Mooring line local (x2 y2 z2) reference axes; the (x2,y2)-plane is perpendicular to the line at curvilinear abscissa s.
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Normal velocity as a function of time for an element of line I located at (a) s=711.3 m; (b) s=686.8 m; (c) s=662.2 m; (d) s=613.2 m; (e) s=539.6 m; (f) s=367.9 m. Excitation period and amplitude, respectively, 100 s and 20 m.
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Normal velocity along line I at time (a) 6.5 s; (b) 19 s; (c) 44 s. Excitation period and amplitude, respectively, 100 s and 20 m.
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Mooring system layout for the Anasuria barge
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Mooring system (lines 1–8) and risers (lines 9 and 10) layout for the FPSO Firenze
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Fraction of critical damping as a function of mean surge amplitude; (a) without current, (b) with current
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Quasi-static method versus time domain methods for low-frequency surge oscillations




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