Forces on Vibrating Cylinder Near Wall in Current and Waves
Publication: Journal of Waterway, Port, Coastal, and Ocean Engineering
Volume 120, Issue 3
Abstract
Forces on a vibrating pipeline have been measured by measuring the instantaneous pressure in eight pressure cells around a vibrating cylinder. The cylinder can only vibrate in the cross‐flow direction. The vibrations are forced. The waves are introduced by the carriage technique. For the current‐alone case it turns out that the drag and the lift increase significantly with increasing amplitude of vibration. The influence is most pronounced at small values of the reduced velocity, where the increase can be up to a factor 3–4 for a free cylinder. Closer to the wall the influence is smaller for the drag, but very large for the lift. In the wave case, the drag, the inertia force, and the lift increase when the pipe is vibrating; the increase in drag is most pronounced for small KC‐numbers while the opposite is the case with respect to the inertia coefficient. The increase in the drag coefficient for a free cylinder is 50–200% for KC about 10 and nearly negligible for KC larger than 60. The similar (opposite) variation is smaller concerning the inertia coefficient where the increase can be up to 30%. Regarding the lift force, an increase up to 200% is observed. Increase in the force coefficients becomes similar to the current‐alone case; smaller increase with decreasing gap, however.
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References
1.
Bearman, P. W. (1988). “Wave loading experiments on circular cylinders at large scale.” Proc., Int. Conf. on Behaviour of Offshore Struct. (BOSS 88), Trondheim, Norway, June, 2, 471–487.
2.
Bishop, R. E. D., and Hassan, A. Y. (1964). “The lift and drag forces on a circular cylinder oscillating in a flowing fluid.” Proc. Royal Soc. A, London, England, 277, 51–75.
3.
Brown, R. J. (1967). “Hydrodynamic forces on a submarine pipeline.” J. Pipeline Div., ASCE, 93, 9–19.
4.
Fredsøe, J., and Hansen, E. A. (1987). “Lift forces on pipelines in steady flow.” J. Wtrwy., Port, Coast., Oc. Engrg. Div., ASCE, 113, 139–155.
5.
Fredsøe, J., Sumer, B. M., Andersen, J., and Hansen, E. A. (1987). “Transverse vibrations of a cylinder very close to a plane wall.” J. Offshore Mech. and Arctic Engrg., 109(1), 52–60.
6.
Jacobsen, V., Bryndum, M. B., and Fredsøe, J. (1984). “Determination of flow kinematics close to marine pipelines and their use in stability calculations.” Proc., 16th Annu. Offshore Technol. Conf., Paper OTC 4833.
7.
Jensen, B. L., Sumer, B. M.,and Fredsøe, J. (1989). “Turbulent oscillatory boundary layers at high Reynolds numbers.” J. Fluid Mech., 206, 265–297.
8.
Justesen, P., Hansen, E. A., Fredsøe, J., Bryndum, M. B., and Jacobsen, V. (1987). “Forces on and flow around near‐bed pipelines in waves and current.” Proc., 6th Int. Offshore Mech. and Arctic Engrg. Symp., ASME, II(March), Houston, Tex., 131–138.
9.
Lundgren, H., Mathiesen, B., and Gravesen, H. (1976). “Wave loads on pipelines on the seafloor.” Proc., 1st Int. Conf. on Behaviour of Offshore Struct. (BOSS 76), I, 236–247.
10.
Hartlen, R. T., and Currie, I. G. (1970). “Lift oscillation model for vortex‐induced vibration.” J. Engrg. Mech. Div., ASCE, 96(EM5), 577–591.
11.
Moe, G., and Wu, Z. (1990). “The lift force on a vibrating cylinder in a current.” J. Offshore Mech. and Arctic Engrg., 112, 297–303.
12.
Sarpkaya, T. (1976). “Forces on cylinders near a plane boundary in a sinusoidally oscillating fluid.” J. Fluids Engrg., 98, 499–505.
13.
Sarpkaya, T. (1977). “In‐line and transverse forces on cylinders near a wall in oscillatory flow at high Reynolds numbers.” Proc., 9th Annu. Offshore Technol. Conf., Paper OTC 2898.
14.
Sarpkaya, T. (1978). “Fluid forces on oscillating cylinders.” J. Wtrwy., Port, Coast., Oc. Div., ASCE, 104(WW3), 275–290.
15.
Sarpkaya, T. (1982). “Flow induced vibration of roughened cylinders.” Proc. of Int. Conf. on Flow Induced Vibrations in Fluid Engrg., BHRA Fluid Engineering, Reading, England, Sept., 131–139.
16.
Sarpkaya, T., and Rajabi, F. (1979). “Hydrodynamic drag on bottom‐mounted smooth and rough cylinders in periodic flow.” Proc., 11th Annu. Offshore Technol. Conf., Paper OTC 3761.
17.
Sumer, B. M., and Fredsøe, J. (1988). “Transverse vibrations of an elastically mounted cylinder exposed to an oscillating flow.” J. Offshore Mech. and Arctic Engrg., 110, 387–394.
18.
Sumer, B. M., Fredsøe, J., and Jacobsen, V. (1986). “Transverse vibrations of a pipeline exposed to waves.” Proc., 5th Int. Offshore Mech. and Arctic Engrg. Symp., ASME, Tokyo, Japan, III(April), 588–596.
19.
Sumer, B. M., Fredsøe, J., Gravesen, H., and Brushi, R. (1989). “Response of marine pipelines in scour trenches.” J. Wtrwy., Port, Coast., and Oc. Engrg., ASCE, 115(4), 477–496.
20.
Sumer, B. M., Jensen, B. L., and Fredsøe, J. (1991). “Effect of a plane boundary on oscillatory flow around a circular cylinder.” J. Fluid Mech., 225, 271–300.
21.
Tsahalis, D. T., and Jones, W. T. (1981). “Vortex‐induced vibrations at a flexible cylinder near a plane boundary in steady flow.” Proc., 13th Annu. Offshore Tech. Conf., Paper OTC 3991.
22.
Wright, J. C., and Yamamoto, T. (1979). “Wave forces on cylinders near plane boundaries.” J. Wtrwy., Port, Coast., Oc. Engrg. Div., ASCE, 105, 1–14.
23.
Yamamoto, T., and Nath, J. H. (1976). “High Reynolds number oscillating flow by cylinders.” Proc., 15th Coast. Engrg. Conf., ASCE, III(July), Honolulu, Hawaii, 2,311–2,340.
24.
Yamamoto, T., Nath, J. H., and Slotta, L. S. (1974). “Wave forces on cylinders near plane boundary.” J. Wtrwy., Port, Coast., Oc. Engrg. Div., ASCE, 100, 345–360.
Information & Authors
Information
Published In
Journal of Waterway, Port, Coastal, and Ocean Engineering
Volume 120 • Issue 3 • May 1994
Pages: 233 - 250
Copyright
Copyright © 1994 American Society of Civil Engineers.
History
Received: Jun 29, 1993
Published online: May 1, 1994
Published in print: May 1994
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