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TECHNICAL PAPERS

Hydrodynamic Coefficient Estimation for TLP and Spar Structures

[+] Author and Article Information
Matthew Lake, Haiping He, Armin W. Troesch, Marc Perlin

Naval Architecture and Marine Engineering, The University of Michigan, 2600 Draper Road, Ann Arbor, MI 48109-2145

Krish P. Thiagarajan

Centre for Oil & Gas Engineering, The University of Western Australia, Nedlands, WA 6907, Australia

J. Offshore Mech. Arct. Eng 122(2), 118-124 (Dec 17, 1999) (7 pages) doi:10.1115/1.533733 History: Received June 16, 1999; Revised December 17, 1999
Copyright © 2000 by ASME
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References

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Fischer, F. J., and Gopalkrishnan, R., 1998, “Some Observations on the Heave Behavior of Spar Platforms,” 17th International Conference on Offshore Mechanics and Arctic Engineering, OMAE98-0603.
Prislin, I., Blevins, R. D., and Halkyard, J. E., 1998, “Viscous Damping and Added Mass of Solid Square Plates,” Proc. Offshore Mechanics and Arctic Engineering Conference, Lisbon, Portugal.
Thiagarajan, K. P., and Troesch, A. W., 1993, “Hydrodynamic Damping Estimation and Scaling for Tension Leg Platforms,” 12th International Conference on Offshore Mechanics and Arctic Engineering, Book No. G00677, pp. 473–479.
Thiagarajan,  K. P., and Troesch,  A. W., 1998, “Effects of Appendages and Small Currents on the Hydrodynamic Heave Damping of TLP Columns,” ASME J. Offshore Mech. Arct. Eng., 120, Feb. pp. 37–42.
Chakrabarti,  S. K., 1989, “Hydrodynamic Damping Tests for a Vertical TLP Leg Model,” Marine Research Newsletter, CBI, 4, No. 2, p. 1.
Keulegan,  G. H., and Carpenter,  L. H., 1958, “Forces on Cylinders and Plates in an Oscillating Fluid,” J. Res. Natl. Bur. Stand., 60, No. 5, pp. 423–440.
Sarpkaya, T., and Isaacson, M., 1981, Mechanics of Wave Forces on Offshore Structures, van Nostrand Reinhold, New York, NY.
Troesch,  A., and Kim,  S., 1991, “Hydrodynamic Forces Acting on Cylinders Oscillating at Small Amplitudes,” Journal of Fluids and Structures, 5, pp. 189–199.
Thiagarajan, K. P., 1991, “Hydrodynamics of Flows Past Disks and Circular Cylinders,” Ph.D. dissertation, Dept. Naval Arch. and Marine Engin., Univ. of Mich., Ann Arbor, MI.
Huse, E., and Torbjorn, U., 1994, “Springing Damping of Tension Leg Platforms,” Proc. Offshore Technology Conference, Houston, TX, pp. 259–266, OTC7446.
Graham,  J. M. R., 1980, “The Forces on Sharp-Edged Cylinders in Oscillatory Flow at Low Keulegan-Carpenter Numbers,” J. Fluid Mech., 97, Part 1, pp. 331–346.
De Bernardinis,  B., Graham,  J. M. R., and Parker,  K. H., 1981, “Oscillatory Flow Around Disks and Through Orifices,” J. Fluid Mech., 102, pp. 279–299.
Huse, E., 1990, “Resonant Heave Damping of Tension Leg Platforms,” 22nd Annual OTC, Paper 6317, pp. 431–436.
Chakrabarti, S. K., and Hanna, S. Y., 1990, “Added Mass and Damping of a TLP Column Model,” 22nd Annual OTC, Paper 6406, pp. 559–571.
Chakrabarti,  S. K., and Hanna,  S. Y., 1991, “High Frequency Hydrodynamic Damping of a TLP Leg,” Symp. Off. Mech. Arctic Eng., 1-A, pp. 147–151.
Moe, G., and Verley, R. L. P., 1980, “Hydrodynamic Damping of Offshore Structures in Waves and Currents,” Proc. Offshore Technology Conference, Houston, TX, 3 , pp. 37–44, OTC3798.
Dalzell, J. F., 1978, “Non-Linear Forces on Oscillating Plates: Review and Analysis of the Literature,” Stevens Institute of Technology, Davidson Laboratory, Hoboken, NJ, Report SIT-DL-78-9-2031.

Figures

Grahic Jump Location
Schematic of the two TLP-spar configurations. (a) Cylinder with disk attached; (b) cylinder and disk separated.
Grahic Jump Location
Schematic of experimental setup for force measurement and flow visualization
Grahic Jump Location
Flow visualization of disk and cylinder-disk configurations at eight phases during a single cycle. β=128,470, KC=0.33.
Grahic Jump Location
Added mass coefficient A for cylinder 5, disk and cylinder-disk configurations as a function of KC number
Grahic Jump Location
Damping coefficient B for disk and cylinder-disk configurations as a function of KC number
Grahic Jump Location
Morison drag coefficient Cd for disk and cylinder-disk configurations as a function of KC number

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