Ocean Systems Engineering

Techno-Press (테크노프레스)
권호 표지
DOI QR코드

DOI QR Code

Suppression of tension variations in hydro-pneumatic riser tensioner by using force compensation control

  • Kang, Hooi-Siang (Faculty of Mechanical Engineering, Universiti Teknologi Malaysia) ;
  • Kim, Moo-Hyun (Department of Ocean Engineering, Texas A&M University, College Station) ;
  • Bhat Aramanadka, Shankar S. (Sabah Shell Petroleum Co. Ltd.) ;
  • Kang, Heon-Yong (Department of Ocean Engineering, Texas A&M University, College Station) ;
  • Lee, Kee-Quen (Department of Mechanical Precision Engineering, Malaysia-Japan International Institute of Technology (MJIIT), Universiti Teknologi Malaysia Kuala Lumpur)
  • Received : 2017.06.22
  • Accepted : 2017.08.30
  • Published : 2017.09.25
⟨ Previous Next ⟩

Abstract

Excessive dynamic-tension variations on the top-tensioned risers (TTRs) deteriorate the structural integrity and cause potential safety hazards. This phenomenon has become more remarkable in the development of deep-water fields with harsher environmental loads. The conventional prediction method of tension variations in hydro-pneumatic tensioner (HPT) has the disadvantage to underestimate the magnitude of cyclic loads. The actual excessive dynamic tension variations are larger when considering the viscous frictional fluid effects. In this paper, a suppression method of tension variations in HPT is modeled by incorporating the magneto-rheological (MR) damper and linear-force actuator. The mathematical models of the combined HPT and MR damper are developed and a force-control scheme is introduced to compensate the excessive tension variations on the riser tensioner ring. Numerical simulations and analyses are conducted to evaluate the suppression of tension variations in HPT under both regular- and irregular-wave conditions for a drilling riser of a tensioned-leg platform (TLP). The results show that significant reduction of tension variations can be achieved by introducing the proposed system. This research has provided a theoretical foundation for the HPT tension control and related structural protection.

Keywords

References

  1. Bae, Y.H. and Kim, M.H. (2013), "Influence of failed blade-pitch-control system to FOWT by aero-elasticcontrol-floater-mooring coupled dynamic analysis", Ocean Syst. Eng., 3(4), 295-307. https://doi.org/10.12989/ose.2013.3.4.295
  2. Dominguez, A., Sedaghati, R. and Stiharu, I. (2008), "Modeling and application of MR dampers in semiadaptive structures", Comput. Struct., 86 (3-5), 407-415. https://doi.org/10.1016/j.compstruc.2007.02.010
  3. Duan, Y.F., Ko, J.M., Ni, Y.Q. and Chen, Z.Q. (2002), "Field comparative tests of cable vibration control using magnetorheological (MR) dampers in single-and twin-damper setups", Proceedings of the 3rd Int. Conference on Advances in Steel Structures, Hong Kong, China, December.
  4. Friedman, A.J. and Shirley, J.D. (2012), "Development and experimental validation of a new control strategy considering device dynamics for large-scale MR dampers using real-time hybrid simulation", Technical report, Intelligent Infrastructure Systems Lab Technical Report IISL-003, Purdue University, West Lafayette, USA.
  5. Gallagher, C., Williams, D. and Lang, D. (2012), "Modelling of marine riser tensioner load variations and implications for minimum top tension settings in drilling risers", Proceedings of the 31st International Conference on Ocean, Offshore and Arctic Engineering, Rio de Janeiro, Brazil, June.
  6. Garrett, D.L. (1982), "Dynamic analysis of slender rods", Energy Resour. Technol., 104(4), 302-306. https://doi.org/10.1115/1.3230419
  7. Gronevik, A. (2013), "Simulation of drilling riser disconnection - recoil analysis", M.Sc. Thesis, Norwegian University of Science and Technology, Trondheim.
  8. Hurlebaus, S. and Gaul, L. (2006), "Review: Smart structure dynamics", Mech. Syst. Signal Pr., 20(2), 255-281. https://doi.org/10.1016/j.ymssp.2005.08.025
  9. Kang, H.S. (2015), "Semi-active magneto-rheological damper and applications in tension leg platform / semisubmersible", Ph.D. Dissertation, Texas A&M University, College Station, USA.
  10. Kang, H.S., Kim, M.H., Bhat Aramanadka, S.S. and Kang, H.Y. (2013), "Semi-active magneto-rheological damper to reduce the dynamic response of top-tension risers", Proceedings of the 23rd International Offshore and Polar Engineering Conference, Anchorage, USA, June.
  11. Kang, H.S., Kim, M.H., Bhat Aramanadka, S.S. and Kang, H.Y. (2014), "Dynamic response control of toptension risers by a variable damping and stiffness system with magneto-rheological damper", Proceedings of the 33rd International Conference on Ocean, Offshore and Arctic Engineering, San Francisco, USA, June.
  12. Kang, H.S., Kim, M.H. and Bhat Aramanadka, S.S. (2017), "Tension variations of hydro-pneumatic riser tensioner and implications for dry-tree interface in semisubmersible", Ocean Syst. Eng., 7(1), 21-38. https://doi.org/10.12989/ose.2017.7.1.021
  13. Kang, H.Y. and Kim, M.H. (2012), "Hydrodynamic interactions and coupled dynamics between a container ship and multiple mobile harbors", Ocean Syst. Eng., 2(3), 217-228. https://doi.org/10.12989/ose.2012.2.3.217
  14. Kim, M.H., Tahar, A. and Kim, Y.B. (2001), "Variability of TLP motion analysis against various design methodologies/parameters", Proceedings of the 11th International Offshore and Polar Engineering Conference, Stavanger, Norway, USA, June.
  15. Kim, Y. (2007), "Nonlinear identification and control of building structures equipped with magnetorheological dampers", Ph.D. Dissertation, Texas A&M University, College Station.
  16. Kim, S.J. and Kim, M.H. (2015), "Dynamic behaviors of conventional SCR and lazy-wave SCR for FPSOs in deep water", Ocean Eng., 106, 396-414. https://doi.org/10.1016/j.oceaneng.2015.06.039
  17. Koo, B.J., Kim, M.H. and Randall, R. (2004), "The effects of nonlinear multi-contact coupling with gap between risers and guide frame on global spar motion analysis", Ocean Eng., 31(11-12), 1469-1502. https://doi.org/10.1016/j.oceaneng.2004.01.002
  18. Kozik, T.J. (1975), "An analysis of a riser joint tensioner system", Proceedings of the Offshore Technology Conference, Houston, USA, May.
  19. Kozik, T.J. and Noerager, J. (1976), "Riser tensioner force variations", Proceedings of the Offshore Technology Conference, Houston, USA, May.
  20. Lee, C.H. and Newman, J.N. (1991), "First-and second-order wave effects on a submerged spheroid", Ship Res., 35(3), 183-190.
  21. Li, S., Campbell, M., Howells, H. and Orsak, J. (2013), "Tension loss of hydro-pneumatic riser tensioners", Proceedings of the 32nd International Conference on Ocean, Offshore and Arctic Engineering, Nantes, France, June.
  22. Ozbulut, O.E., Bitaraf, M. and Hurlebaus, S. (2011), "Adaptive control of base-isolated structures against near-field earthquakes using variable friction dampers", Eng. Struct., 33(12), 3143-3154. https://doi.org/10.1016/j.engstruct.2011.08.022
  23. Ran, Z. (2000), "Coupled dynamic analysis of floating structures in waves and currents", Ph.D. Dissertation, Texas A&M University, College Station, USA.
  24. Spencer Jr, B.F., Dyke, S.J., Sain, M.K. and Carlson, J.D. (1997), "Phenomenological model for magnetorheological dampers", Eng. Mech., 123(3), 230-238. https://doi.org/10.1061/(ASCE)0733-9399(1997)123:3(230)
  25. Sten, R., Hansen, M.R., Larsen, C.M. and Sævik, S. (2010), "Force variations on heave compensating system for ultra-deepwater drilling risers", Proceedings of the 29th International Conference on Ocean, Offshore and Arctic Engineering, Shanghai, China, June.
  26. Trent, D. (2012), "Tensioner system with recoil controls", U.S. Patent: 8,157,013 B1, issued Apr. 17, 2012.
  27. Tse, T. and Chang, C.C. (2002), "Seismic protection of base-isolated structures using semi-active MR dampers", Adv. Build. Technol., 1, 529-536.
  28. Yang, G., Spencer Jr, B.F., Jung, H.J. and Carlson, J.D. (2004), "Dynamic modeling of large-scale magnetorheological damper systems for civil engineering applications", Eng. Mech., 130(9), 1107-1114. https://doi.org/10.1061/(ASCE)0733-9399(2004)130:9(1107)
  29. Yang, C.K. (2009), "Numerical modeling of nonlinear coupling between lines/beams with multiple floating bodies", Ph.D. Dissertation, Texas A&M University, College Station.
  30. Yang, C.K. and Kim, M.H. (2010), "Linear and nonlinear approach of hydropneumatic tensioner modeling for Spar global performance", Offshore Mech. Artic Eng., 132(1), 011601. https://doi.org/10.1115/1.3160468
  31. Yang, C.K. and Kim, M.H. (2011), "The structural safety assessment of a tie-down system on a tension leg platform during hurricane events", Ocean Syst. Eng., 1(4), 263-283. https://doi.org/10.12989/ose.2011.1.4.263
  32. Yang, M.G., Chen, Z.Q. and Hua, X.G. (2011), "An experimental study on using MR damper to mitigate longitudinal seismic response of a suspension bridge", Soil Dynam. Earthq. Eng., 31(8), 1171-1181. https://doi.org/10.1016/j.soildyn.2011.04.006
  33. Yao, G., Yap, F., Chen, G., Li, W. and Yeo, S. (2002), "MR damper and its application for semi-active control of vehicle suspension system", Mechatronics, 12(7), 963-973. https://doi.org/10.1016/S0957-4158(01)00032-0