Structural Engineering and Mechanics

Techno-Press (테크노프레스)
권호 표지
DOI QR코드

DOI QR Code

Fatigue performance of deepwater SCR under short-term VIV considering various S-N curves

  • Kim, D.K. (Civil Engineering Department, Universiti Teknologi PETRONAS) ;
  • Choi, H.S. (Graduate School of Engineering Mastership, Pohang University of Science and Technology) ;
  • Shin, C.S. (Graduate School of Engineering Mastership, Pohang University of Science and Technology) ;
  • Liew, M.S. (Faculty of Geoscience and Petroleum Engineering, Universiti Teknologi PETRONAS) ;
  • Yu, S.Y. (Deepwater Technology Mission Oriented Research, Universiti Teknologi PETORNAS) ;
  • Park, K.S. (Steel Business Division, POSCO)
  • Received : 2013.12.28
  • Accepted : 2014.10.28
  • Published : 2015.03.10
⟨ Previous Next ⟩

Abstract

In this study, a method for fatigue performance estimation of deepwater steel catenary riser (SCR) under short-term vortex-induced vibration was investigated for selected S-N curves. General tendency between S-N curve capacity and fatigue performance was analysed. SCRs are generally used to transport produced oil and gas or to export separated oil and gas, and are exposed to various environmental loads in terms of current, wave, wind and others. Current is closely related with VIV and it affects fatigue life of riser structures significantly. In this regards, the process of appropriate S-N curve selection was performed in the initial design stage based on the scale of fabrication-related initial imperfections such as welding, hot spot, crack, stress concentration factor, and others. To draw the general tendency, the effects of stress concentration factor (SCF), S-N curve type, current profile, and three different sizes of SCRs were considered, and the relationship between S-N curve capacity and short-term VIV fatigue performance of SCR was derived. In case of S-N curve selection, DNV (2012) guideline was adopted and four different current profiles of the Gulf of Mexico (normal condition and Hurricane condition) and Brazil (Amazon basin and Campos basin) were considered. The obtained results will be useful to select the S-N curve for deepwater SCRs and also to understand the relationship between S-N curve capacity and short-term VIV fatigue performance of deepwater SCRs.

Keywords

Acknowledgement

Supported by : Korea Institute of Energy Technology Evaluation and Planning (KETEP)

References

  1. Allen, D.W., Henning, D.L. and Lee, L. (2004), "Performance comparisons of helical strakes for VIV suppression of risers and tendons", Offshore Technology Conference (OTC 2004), Houston, USA, May.
  2. Bai, Y. and Bai, Q. (2010), Subsea Engineering Handbook, Chapter 26: Subsea Production Risers, Gulf Professional Publishing, Oxford, UK.
  3. DNV (2010a), Environmental conditions and environmental loads (DNV-RP-C205), Det Norske Veritas, October, Oslo, Norway.
  4. DNV (2010b), Riser Fatigue (DNV-RP-F204), Det Norske Veritas, October, Oslo, Norway.
  5. DNV (2012), Fatigue Design of Offshore Steel Structures (DNV-RP-C203), Det Norske Veritas, October, Oslo, Norway.
  6. Elosta, H., Huang, S. and Incecik, A. (2013a), "Dynamic response of steel catenary riser using a seabed interaction under random loads", Ocean Eng., 69, 34-43. https://doi.org/10.1016/j.oceaneng.2013.05.022
  7. Elosta, E., Huang, S. and Incecik, A. (2013b), "Wave loading fatigue reliability and uncertainty analysis for geotechnical pipeline models", Ship. Offsh. Struct., 9(4), 450-463. https://doi.org/10.1080/17445302.2013.834168
  8. Kim, Y.T. (2014), "Nonlinear soil model effect on the fatigue performance of the SCR", M.Sc. Dissertation, Graduate School of Engineering Mastership, Pohang University of Science and Technology, Pohang, Korea.
  9. Lejlic, E. (2013), "Vortex induced fatigue damage of a steel catenary riser near the touchdown point", M.Sc. Dissertation, Department of Marine Technology, Norwegian University of Science and Technology, Trondheim, Norway.
  10. Lim, F. and Howells, H. (2000), Deepwater riser VIV, fatigue, and monitoring, Fatigue and Monitoring, 2H Offshore Engineering Ltd., USA.
  11. MCS (2005), Independence hub - MC920 SCR detailed design: riser design basis & methodology, Altantia Offshore Ltd.
  12. Park, K.S. (2014), "Design of deepwater SCR considering fatigue performance", M.Sc. Dissertation, Graduate School of Engineering Mastership, Pohang University of Science and Technology, Pohang, Korea.
  13. Park, K.S., Choi, H.S., Kim, D.K., Yu, S.Y. and Kang, S.C. (2015a), "Structural analysis of deepwater steel catenary riser using OrcaFlex", J. Ocean Eng. Tech., 29(1), page number: TBD. (in Press)
  14. Park, K.S., Kim, Y.T., Kim, D.K., Yu, S.Y. and Choi, H.S. (2015b), "A new method for strake configuration design of Steel Catenary Riser", Ship. Offsh. Struct., 1-20. (ahead-of-print)
  15. Randolph, M.F. and Quiggin, P. (2009), "Non-linear hysteretic seabed model for catenary pipeline contact", The 28th International Conference on Ocean, Offshore and Arctic Engineering (OMAE 2009), Honolulu, USA, May-June.
  16. Rao, Z., Vandiver, J.K., Jhingran, V. and Sequeiros, O. (2012), "The effect of exposure length on vortex induced vibration of flexible cylinders", The 31th International Conference on Offshore Mechanics and Arctic Engineering (OMAE 2012), Rio de Janeiro, Brazil, July.
  17. Sarpkaya, T. (2004). "A critical review of the intrinsic nature of vortex-induced vibrations", J. Fluid Struct., 19(4), 389-447. https://doi.org/10.1016/j.jfluidstructs.2004.02.005
  18. Shiri, H. (2014), "Response of steel catenary risers on hysteretic nonlinear seabed", Appl. Ocean Res., 44, 20-28. https://doi.org/10.1016/j.apor.2013.10.006
  19. Vandiver, J.K. (1999), User guide for SHEAR7, Massachusetts Institute of Technology, Department of Ocean Engineering, MA, USA.
  20. Vandiver, J.K., Swithenbank, S., Jaiswal, V. and Marcollo, H. (2006), "The effectiveness of helical strakes in the suppression of high-mode-number VIV", Offshore Technology Conference (OTC 2006), Houston, USA, May.
  21. Yu, S.Y., Choi, H.S., Lee, S.K., Do, C.H. and Kim, D.K. (2013), "An optimum design of on-bottom stability of offshore pipelines on soft clay", Int. J. Nav. Arch. Ocean Eng., 5(4), 598-613.
  22. Yu, S.Y., Choi, H.S., Lee, S.K., Park, K.S. and Kim, D.K. (2015), "Nonlinear soil parameter effects on dynamic embedment of offshore pipeline on soft clay" Int. J. Nav. Arch. Ocean Eng., 7, http://dx.doi.org/10.1515/ijnaoe-2015-0016. (in Press)

Cited by

  1. Fatigue performance of deepwater steel catenary riser considering nonlinear soil vol.61, pp.6, 2015, https://doi.org/10.12989/sem.2017.61.6.737
  2. A parametric study on fatigue of a top-tensioned riser subjected to vortex-induced vibrations vol.6, pp.4, 2019, https://doi.org/10.12989/smm.2019.6.4.365
  3. Vortex-induced vibration characteristics of a low-mass-ratio flexible cylinder vol.75, pp.5, 2015, https://doi.org/10.12989/sem.2020.75.5.621