Response of Marine Pipelines in Scour Trenches
Publication: Journal of Waterway, Port, Coastal, and Ocean Engineering
Volume 115, Issue 4
Abstract
This paper reviews the results of a model test study with the aim of determining the hydroelastic vibrations of a marine pipeline placed in the vicinity of a scoured trench and exposed to regular and irregular waves. The so‐called carriage technique was used in the study. The experiments were conducted for two values of Keulegan‐Carpenter number, namely and The range of reduced velocity is from 3 to 8. The range of Reynolds number of the tests is The pipe's surface‐roughness parameter is The model pipe has two degrees of freedom. Pipe displacements and forces have been measured. The position of the pipe relative to the trench appears to be quite significant in the vibratory response of the pipe. It turns out that the presence of the scour trench protects the pipe against the vibrations. The experiments also show that the amplitudes of vibrations are generally larger for irregular waves than for regular waves.
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References
1.
Bruschi, R. et al. (1986). “Scour‐induced free‐span analysis.” Proc. 5th Int. Symp. on Offshore Mechanics and Arctic Engineering, American Society of Mechanical Engineers, III, 656.
2.
Bruschi, R. et al. (1988). “Submarine pipeline design against hydroelastic oscillations: the SVS project.” Proc. 7th Int. Symp. on Offshore Mechanics and Arctic Engineering, American Society of Mechanical Engineers, V, 117.
3.
Eide, L. O., Leopardi, G., and Bruschi, R. (1988). “The experience from the statpipe system on free‐span development and analysis.” Proc. of the Offshore Pipeline Technology Seminar, Norwegian Petroleum Directory, Stavanger, Norway.
4.
Fredsøe, J., et al. (1987a). “Transverse vibrations of a cylinder very close to a plane wall.” J. Offshore Mech. and Arctic Engrg., American Society of Mechanical Engineers, 109(1), 52.
5.
Fredsøe, J. et al. (1987b). “Three‐dimensional scour below pipelines.” Proc. 6th Int. Symp. on Offshore Mechanics and Arctic Engineering, American Society of Mechanical Engineers.
6.
Hulsbergen, C. H. (1984). “Stimulated self‐burial of submarine pipelines.” Proc. 16th Ann. Offshore Technology Conf., Houston, Tex.
7.
Jacobsen, V., et al. (1984). “Cross‐flow vibrations of a pipe close to a rigid boundary.” J. Energy Resour. Tech., American Society of Mechanical Engineers, 106, Dec. 451.
8.
Justesen, P. et al. (1987). “Forces on and flow around near‐bed pipelines in waves and current.” Proc. 6th Int. Symp. on Offshore Mechanics and Arctic Engineering, American Society of Mechanical Engineers, II, 131.
9.
Sarpkaya, T. (1976). “In‐line and transverse forces on smooth and sand‐roughened cylinders in oscillatory flow at high Reynolds numbers.” Report No. NPS 69SL76062, U.S. Naval Postgraduate School, Monterey, Calif.
10.
Sarpkaya, T., and Isaacson, M. (1981). Mechanics of wave forces on offshore structures. Van Nostrand Reinhold Co. Inc., New York, N.Y.
11.
Sumer, B. M., Fredsøe, J., and Jacobsen, V. (1986). “Transverse vibrations of a pipeline exposed to waves.” Proc. 5th Int. Symp. on Offshore Mechanics and Arctic Engineering, American Society of Mechanical Engineers, III, 588.
12.
Sumer, B. M., and Fredsøe, J. (1987). “Transverse vibrations of an elastically mounted cylinder exposed to an oscillating flow.” Proc. 6th Int. Symp. on Offshore Mechanics and Arctic Engineering, American Society of Mechanical Engineers, II, 165.
13.
Sumer, B. M., and Fredsøe, J. (1988). “Vibrations of cylinders at high Reynolds numbers.” Proc. 7th Int. Symp. on Offshore Mechanics and Arctic Engineering, American Society of Mechanical Engineers, II, 211.
14.
Sumer, B. M., Fredsøe, J., and Gravesen, H. (1988). “Vibrations of pipelines in scour trenches.” Proc. 5th Int. Conf. on Behavior of Offshore Structures, The Norwegian Institute of Technology, 2, 565.
15.
Sumer, B. M., Mao, Y., and Fredsøe, J. (1988). “Interaction between vibrating pipe and erodible bed.” J. Wtrway., Port, Coast., and Oc. Engrg., ASCE, 114(1), 81.
16.
Tsahalis, D. T. (1985). “Vortex‐induced vibrations due to steady and wave‐induced currents of a flexible cylinder near a plane boundary.” Proc. 4th Int. Symp. On Offshore Mechanics and Arctic Engineering, I, 618.
17.
Tsahalis, D. T., and Jones, W. T. (1982). “The effect of the sea‐bottom on the fatigue life of suspended spans of offshore pipelines undergoing vortex‐induced vibrations.” Proc. 14th Ann. Offshore Technology Conf., Houston, Tex.
Information & Authors
Information
Published In
Journal of Waterway, Port, Coastal, and Ocean Engineering
Volume 115 • Issue 4 • July 1989
Pages: 477 - 496
Copyright
Copyright © 1989 ASCE.
History
Published online: Jul 1, 1989
Published in print: Jul 1989
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