Wind-Induced Response of Tension Leg Platform: Theory and Experiment
Publication: Journal of Structural Engineering
Volume 121, Issue 4
Abstract
The effects of wind and wave loads on the response of tension leg platforms have been studied extensively over the past decade; however, this study represents the first attempt to compare the response predictions to a model study of a tension leg platform performed in a properly scaled wind/wave environment. Experimental results and numerical simulations were in agreement. The paper discusses some of the difficulties encountered in combined wind/wave testing. The numerical models include first- and second-order wave loads and the simultaneous action of dynamic wind loads. The effect of wind on the surge response of the platform was strongly dependent on the existing waves. The wind-induced response tends to dominate the overall surge response in cases where the overwater fetch is small (i.e., small waves) and the wind is strong; however, for large waves, the reverse is true. The inclusion of wind forces significantly increased the heave response of the tension leg platform.
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References
1.
Amorocho, J., and Devries, J. J.(1980). “A new evaluation of wind stress coefficient over water surfaces.”J. Geophys. Res., 85, 433–442.
2.
Banon, H., Cornell, C. A., and Harding, S. J. (1991). “Probabilistic combination of forces in tension leg platform tethers.”J. Struct. Engrg., ASCE, 117(5).
3.
Bowers, E. C.(1976). “Long period oscillations of moored ships subject to short wave seas.”Trans., Royal Institute of Naval Architecture, London, England, 118, 181–191.
4.
Davenport, A. B.(1961). “The application of statistical concepts to the wind-loading of structure.”Proc., Institute of Civil Engineers, London, England, 19, 449–472.
5.
“Characteristics of atmospheric turbulence near the ground. Part II: Single point data for strong winds (neutral atmosphere).” (1985). Data Item ESDU 85020, Engrg. Sci. Data Unit, London, England.
6.
“Characteristics of atmospheric turbulence near the ground. Part III: Variations in space and time for strong winds (neutral atmosphere).” (1986). Data Item ESDU 86010, Engrg. Sci. Data Unit, London, England.
7.
Garrison, C. J. (1978). “Hydrodynamic loading of large offshore structures, three-dimensional source distribution method.”Numerical methods in offshore engineering, O. C. Zienkiewicz, R. W. Lewis, and K. G. Stagg, eds., Wiley, Chichester, England, 97–140.
8.
Harris, R. I. (1971). “The nature of wind.”The Modern design of wind-sensitive structures, CIRIA, London, England.
9.
Kaimal, J. C., Wyngaard, J. C., Izumi, Y., and Cote, O. R.(1972). “Spectral characteristics of the surface layer turbulence.”Quart. J. Roy. Meteor. Soc., 98, 563–589.
10.
Kareem, A.(1985). “Wind-induced response analysis of tension leg platforms.”J. Struct. Engrg., ASCE, 111(1), 37–55.
11.
Kareem, A., and Dalton, C. (1982). “Dynamic effects of wind on tension leg platforms.”Proc. Ocean Struct. Dyn. Symp. '82, Oregon State University, Corvallis, Ore., 563–585.
12.
Li, Y., and Kareem, A.(1990). “Stochastic response of tension leg platforms to wind and wave fields.”J. Wind Engrg. and Industrial Aerodyn., 36, 915–926.
13.
Kareem, A., and Li, Y.(1993). “Wind-excited surge response of a tension leg platform: Frequency-domain approach.”J. Engrg. Mech., ASCE, 119(1), 161–183.
14.
Pinkster, J. A. (1980). “Low frequency second order exiting forces on floating structures.”Publication No. 650, Netherlands Ship Model Basin, Wageningen, Netherlands.
15.
Sarpkaya, T.(1986). “Forces on a circular cylinder in viscous oscillating flow at low Keulegan-Carpenter numbers.”J. Fluid Mech., 165, 61–71.
16.
Shinozuka, M. (1971). “Simulation of multivariate and multidimensional random processes.”J. Acoustical Soc. of Am., 49(1) (part 2), 357–368.
17.
Shiotani, M.(1975). “Turbulence measurements at the sea coast during high wind.”J. Meteor. Soc. of Japan, 53(5), 340–354.
18.
Simiu, E., and Leigh, S. D. (1983). “Turbulent wind effects on tension leg platform surge.”NBS Building Science Series 151, Nat. Bureau of Standards, Washington, D.C., Mar.
19.
Standing, R. G., Dachuna, N. M. C., and Matten, R. B. (1981). “Slowly varying second order wave forces: Theory and experiment.”NMI Report No. R138, Nat. Maritime Inst., Feltham, England, Oct.
20.
Vickery, P. J. (1988). “Wind and wave loads on a tension leg platform: Theory and experiment,” PhD thesis, University of Western Ontario, London, Ontario.
21.
Vickery, P. J., Vickery, B. J., and Davenport, A. G. (1985). “Gust factors and turbulence measured 50 m over the sea off Sable Island.”Proc. Int. Workshop on Offshore Winds and Icing, Environment Canada, Downsview, Ontario, 196–213.
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Information
Published In
Journal of Structural Engineering
Volume 121 • Issue 4 • April 1995
Pages: 651 - 663
Copyright
Copyright © 1995 American Society of Civil Engineers.
History
Published online: Apr 1, 1995
Published in print: Apr 1995
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