Role of mini tension leg platforms (TLP) in oil exploration and production in marginal deepwater fields is becoming increasingly important. Mini TLP combines the simplicity of a spar and favorable response features of a TLP. In this paper, the results of a detailed experimental and numerical investigation of the coupled dynamic behavior of a mini TLP are reported with special attention to hull-tether coupling. The experimental study has been carried out using a scaled model in wave flume with specially designed tethers whose first two “string” natural frequencies are excited by waves, thus achieving strong hull-tether coupling. The numerical study has been carried out using a nonlinear time domain finite element method specifically addressed to compliant offshore platforms using a combination of potential theory based wave loading and Morison-type wave loading. Extensive comparisons between numerical and experimental results have been made both for platform motions and deflected shapes of the tethers and conclusions drawn.
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November 2004
Technical Papers
Experimental and Numerical Study of Coupled Dynamic Response of a Mini Tension Leg Platform
Anitha Joseph,
Anitha Joseph
Department of Ocean Engineering, Indian Institute of Technology, Madras, India
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V. G. Idichandy,
V. G. Idichandy
Department of Ocean Engineering, Indian Institute of Technology, Madras, India
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S. K. Bhattacharyya
S. K. Bhattacharyya
Department of Ocean Engineering, Indian Institute of Technology, Madras, India
Faculty of Engineering and Applied Science, Memorial University of Newfoundland, St. John’s, Canada
Institute for Ocean Technology, National Research Council, St. John’s, Canada
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Anitha Joseph
Department of Ocean Engineering, Indian Institute of Technology, Madras, India
V. G. Idichandy
Department of Ocean Engineering, Indian Institute of Technology, Madras, India
S. K. Bhattacharyya
Department of Ocean Engineering, Indian Institute of Technology, Madras, India
Faculty of Engineering and Applied Science, Memorial University of Newfoundland, St. John’s, Canada
Institute for Ocean Technology, National Research Council, St. John’s, Canada
Contributed by the OOAE Division for publication in the JOURNAL OF OFFSHORE MECHANICS AND ARCTIC ENGINEERING. Manuscript received June 15, 2003; final revision, December 3, 2003. Associate Editor: R. Riggs.
J. Offshore Mech. Arct. Eng. Nov 2004, 126(4): 318-330 (13 pages)
Published Online: March 7, 2005
Article history
Received:
June 15, 2003
Revised:
December 3, 2003
Online:
March 7, 2005
Citation
Joseph , A., Idichandy, V. G., and Bhattacharyya, S. K. (March 7, 2005). "Experimental and Numerical Study of Coupled Dynamic Response of a Mini Tension Leg Platform ." ASME. J. Offshore Mech. Arct. Eng. November 2004; 126(4): 318–330. https://doi.org/10.1115/1.1833358
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