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China Ocean Engineering

, Volume 30, Issue 4, pp 603–614 | Cite as

Response analysis of tension-based tension leg platform under irregular waves

  • D. S. Bhaskara Rao
  • R. Panneer SelvamEmail author
Article

Abstract

Tension Leg Platform (TLP) is a hybrid structure used as oil drilling and production facility within water depths of 1200 m. The extension of this TLP concept to deeper waters is a challenge and warrants for some innovative design concepts. In this paper, a relatively new concept of TLP which is christened as Tension-Based Tension Leg Platform (TBTLP) and patented by Srinivasan (1998) has been chosen for study. Response analysis of TLP with one tension base under irregular waves for three different sea states has been performed using hydrodynamic tool ANSYS® AQWA™. Results are reported in terms of RAOs, response spectrums for surge, heave and pitch degrees of freedom from which spectral statistics have been obtained. The statistics of TBTLP have been compared with TLPs (without tension base) for two different water depths to highlight the features of the new concept. The effect of viscous damping and loading effects on the RAOs are also investigated.

Key words

Tension-Based Tension Leg Platform irregular waves time domain response response amplitude operators spectrum statistics coupled analysis 

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References

  1. Abbott, P., Nygaard, C., Huang, E., Johnson, B., DSouza, R., Dove, P. and Datta, B., 1994. Tension raft/frame reduces TLP motions, costs, Offshore, 54(8): 40–62.Google Scholar
  2. Ansys Inc., 2010. AQWA (LINE, LIBRIUM and NAUT) Manuals, Ansys Inc., Release 13.0.Google Scholar
  3. Chakrabarti, S. K., 1987. Hydrodynamics of Offshore Structures, Computational Mechanics Limited and Springer-Verlag, New York.Google Scholar
  4. DNV, 2010. DNV-RP-C205: Environmental Conditions and Environmental Loads, October 2010.Google Scholar
  5. Jagannathan, S., 1992. The suspended tension leg platform (STLP): A new platform concept for deepwater exploration and production, Proceedings of the 11th International Conference on Offshore Mechanics and Arctic Engineering, Calgary, Canada, Vol. 1, 517–525.Google Scholar
  6. Kibbee, S., 1996. Sea star minimal platform for small deepwater reserves, Offshore, 56(6): 46–73.Google Scholar
  7. Murray, J., Yang, C. K., Yang, W., Krishnaswamy, P. and Zou, J., 2009. An extended tension leg platform design for post-Katrina Gulf of Mexico, Proceedings of the 19th International Offshore and Polar Engineering Conference, Osaka, Japan, Vol. 1, 120–126.Google Scholar
  8. Bhaskara Rao, D. S., Panneer Selvam, R. and Srinivasan, N., 2012. Hydrodynamic analysis of tension based tension leg platform, Proceedings of the 31st International Conference on Ocean, Offshore Mechanics and Arctic Engineering (OMAE2012), Rio de Janeiro, Brazil, 3256, 201–207.Google Scholar
  9. Srinivasan, N., 1998. Tension Base for Tension Leg Platform, United States Patent No: 5707178.Google Scholar
  10. Srinivasan, N., 2010. Tension-based tension leg platform: Technologies for ultra deepwater applications, Proceedings of the 29th International Conference on Ocean, Offshore Mechanics and Arctic Engineering (OMAE2010), Shanghai, China, 0042, 31–42.Google Scholar
  11. Srinivasan, N., 2011. TLP for Gulf of Mexico Ultra Deep Water, Deep Offshore Technology International, New Orleans, USA.Google Scholar

Copyright information

© Chinese Ocean Engineering Society and Springer-Verlag Berlin Heidelberg 2016

Authors and Affiliations

  1. 1.Department of Ocean EngineeringIndian Institute of Technology MadrasChennaiIndia

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