Structural Monitoring and Maintenance

  • 제6권4호
  • /
  • Pages.365-387
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  • 2019
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  • 2288-6605(pISSN)
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  • 2288-6613(eISSN)
테크노프레스 (Techno-Press)
권호 표지
DOI QR코드

DOI QR Code

A parametric study on fatigue of a top-tensioned riser subjected to vortex-induced vibrations

  • Kim, Do Kyun (Marine Offshore and Subsea Technology (MOST) Group, School of Engineering, Newcastle University) ;
  • Wong, Eileen Wee Chin (Ocean and Ship Technology Research Group (Department of Civil and Environmental Engineering), Universiti Teknologi PETRONAS) ;
  • Lekkala, Mala Konda Reddy (Ocean and Ship Technology Research Group (Department of Civil and Environmental Engineering), Universiti Teknologi PETRONAS)
  • 투고 : 2019.06.07
  • 심사 : 2019.08.15
  • 발행 : 2019.12.25
⟨ 이전 논문 다음 논문 ⟩

초록

This study aims to provide useful information on the fatigue assessment of a top-tensioned riser (TTR) subjected to vortex-induced vibration (VIV) by performing parametric study. The effects of principal design parameters, i.e., riser diameter, wall thickness, water depth (related to riser length), top tension, current velocity, and shear rate (or shear profile of current) are investigated. To prepare the base model of TTR for parametric studies, three (3) riser modelling techniques in the OrcaFlex were investigated and validated against a reference model by Knardahl (2012). The selected riser model was used to perform parametric studies to investigate the effects of design parameters on the VIV fatigue damage of TTR. From the obtained comparison results of VIV analysis, it was demonstrated that a model with a single line model ending at the lower flex joint (LFJ) and pinned connection with finite rotation stiffness to simulate the LFJ properties at the bottom end of the line model produced acceptable prediction. Moreover, it was suitable for VIV analysis purposes. Findings from parametric studies showed that VIV fatigue damage increased with increasing current velocity, riser outer diameter and water depth, and decreased with increasing shear rate and top tension of riser. With regard to the effects of wall thickness, it was not significant to VIV fatigue damage of TTR. The detailed outcomes were documented with parametric study results.

키워드

과제정보

연구 과제 주관 기관 : Ministry of Trade, Industry & Energy (MI), YUTP

참고문헌

  1. Bai, Y. and Bai, Q. (2005), Subsea Pipelines and Risers, Elsevier Ltd., Oxford. UK.
  2. DNV (2010), Riser Fatigue (RP-F204), Det Norske Veritas, Oslo, Norway.
  3. Fu, B., Zou, L. and Wan, D. (2017), "Numerical study on the effect of current profiles on vortex-induced vibrations in a top-tension riser", J. Mar. Sci. Appl., 16(4), 473-479. https://doi.org/10.1007/s11804-017-1429-3.
  4. ISO (2009), Petroleum and Natural Gas Industries - Drilling and Production Equipment (ISO 13624-1), International Organization for Standardization, Geneva, Switzerland.
  5. Jang, M.W. (2016), "Drilling riser system analysis for ultra-deepwater", MSc. Dissertation, Graduate School of Engineering Mastership, Pohang University of Science and Technology (POSTECH), Pohang, Korea.
  6. Knardahl, G.M. (2012), "Vortex induced vibrations of marine risers", MSc. Dissertation, University of Science and Technology (NTNU), Trondheim, Norwegian.
  7. Komachi, Y., Mazaheri, S. and Tabeshpour, M. (2017), "The effect of shifting natural frequency on the reduction of vortex-induced vibrations of marine risers", Int. J. Coastal Offshore Eng., 1(1), 9-16. https://doi.org/10.18869/acadpub.ijcoe.11.9.
  8. Kim, D.K., Incecik, A., Choi, H.S., Wong, E.W.C., Yu, S.Y. and Park, K.S. (2018), "A simplified method to predict fatigue damage of offshore riser subjected to vortex-induced vibration by adopting current index concept", Ocean Eng., 157, 401-411. https://doi.org/10.1016/j.oceaneng.2018.03.042.
  9. Kim, D.K., Wong, E.W.C., Lee, E.B., Yu, S.Y. and Kim, Y.T. (2019), "A method for the empirical formulation of current profile", Ships Offshore Struct., 14(2), 176-192. https://doi.org/10.1080 /17445302.2018.1488340. https://doi.org/10.1080/17445302.2018.1488340
  10. Kim, Y.T., Kim, D.K., Choi, H.S., Yu, S.Y. and Park, K.S. (2017), "Fatigue performance of deepwater steel catenary riser considering nonlinear soil effect", Struct. Eng. Mech., 61(6), 737-746. https://doi.org/10.12989/sem.2017.61.6.737.
  11. Le Cunff, C., Biolley, F., Fontaine, E., Etienne, S. and Facchinetti, M.L. (2002), "Vortex-induced vibrations of risers: theoretical, numerical and experimental investigation", Oil & Gas Sci. Technol., 57(1), 59-69. https://doi.org/10.2516/ogst:2002004.
  12. Li, X., Guo, H. and Meng, F. (2010), "Fatigue life assessment of top tensioned risers under vortex-induced vibrations", J. Ocean Univ. China, 9(1), 43-47. https://doi.org/10.1007/s11802-010-0043-7.
  13. Lie, H. and Kaasen, K.E. (2006), "Modal analysis of measurements from a large-scale VIV model test of a riser in linearly sheared flow", J. Fluids Struct., 22(4), 557-575. https://doi.org /10.1016/j.jfluidstructs.2006.01.002.
  14. Low, Y.M. and Srinil, N. (2016), "VIV fatigue reliability analysis of marine risers with uncertainties in the wake oscillator model", Eng. Struct., 106, 96-108. https://doi.org/10.1016/j.engstruct. 2015.10.004.
  15. Luoa, G., Chen, J. and Zhou, X. (2015), "Effects of various factors on the VIV-induced fatigue damage in the cable of submerged floating tunnel", Polish Maritime Res., 22(4). https://doi.org /76-83. 10.1515/pomr-2015-0075.
  16. Orcina (2012), "OrcaFlex User's Manual (Version 9.6a)", Daltongate, UK.
  17. Queau, L.M. (2015), "Estimating the fatigue damage of steel catenary risers in the touchdown zone", Ph.D. Dissertation, University of Western Australia, Crawley, Australia.
  18. Park, K.S. Kim, Y.T., Kim, D.K., Yu, S.Y. and Choi, H.S. (2015). "Structural analysis of deepwater steel catenary riser using OrcaFlex", J. Ocean Eng. Technol., 29(1), 16-27. https://doi.org/10.5574/KSOE.2015.29.1.016.
  19. Park, K.S., Kim, Y.T., Kim, D.K., Yu, S.Y. and Choi, H.S. (2016), "A new method for strake configuration of Steel Catenary Risers", Ships Offshore Struct., 11(4), 385-404. https://doi.org/10.1080/17445302.2014.999479.
  20. Roveri, F.E. (2007), "A sensitivity study on fatigue damage of a drilling riser caused by vortex-induced vibrations", Proceedings of the 39th Offshore Technology Conference (OTC 2007), Houston, USA (OTC-19026). https://doi.org/10.4043/19026-MS.
  21. Roveri, F.E. and Vandiver, J.K. (2001), "Slenderex: using shear7 for assessment of fatigue damage caused by current induced vibrations", Proceedings of the 20th International Conference on Offshore Mechanics and Arctic Engineering (OMAE 2001), Rio de Janeiro, Brazil (OMAE01-1163).
  22. Schiller, R.V., Caire, M., Nobrega, P.H.A., Passano, E. and Lie, H. (2014), "Vortex induced vibrations of deep water risers: sensitivity to current profile, shear and directionality", Proceedings of the 33rd International Conference on Ocean, Offshore and Arctic Engineering, San Francisco, USA (OMAE2014-24141). https://doi.org/10.1115/OMAE2014-24141.
  23. Vafin, A. (2015), "Simulation-based assessment of drilling riser and its application for the Kara Sea region", MSc. Dissertation, University of Stavanger, Stavanger, Norway.
  24. Wang, Y.F. (2008), "Prediction methods for the VIV-induced fatigue damage in deep sea risers", PhD. Dissertation, Shanghai Jiaotong University, Shanghai, China.
  25. Wong, E.W.C. and Kim, D.K. (2018), "A simplified method to predict fatigue damage of TTR subjected to short-term VIV using Artificial Neural Network", Adv. Eng. Softw., 126, 100-109. https://doi.org/10.1016/j.advengsoft.2018.09.011.
  26. Xu, J., Wang, D., Huang, H., Duan, M., Gu, J. and An, C. (2017), "A vortex-induced vibration model for the fatigue analysis of a marine drilling riser", Ships Offshore Struct., 12(S1), 280-287. https://doi.org/10.1080/17445302.2016.1271557.
  27. Xue, H., Guo, J., Tang, W. and Zhang, S. (2011), "Characteristic analysis of VIV-induced fatigue damage of top tensioned risers based on simplified model", J. Offshore Mech. Arctic Eng., 133(2), 0213041-1-7. https://doi.org/10.1115/1.4002046.
  28. Xue, H., Tang, W. and Qu, X. (2014), "Prediction and analysis of fatigue damage due to cross-flow and in-line VIV for marine risers in non-uniform current", Ocean Eng., 83(1), 52-62. https://doi.org/10.1016/j.oceaneng.2014.03.023.
  29. 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. Naval Architect. Ocean Eng., 5(4), 598-613. https://doi.org/10.2478/IJNAOE-2013-0156.
  30. 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", Struct. Eng. Mech., 53(5), 881-896. https://doi.org/10.1515/ijnaoe-2015-0016.
  31. Yu, S.Y., Choi, H.S., Park, K.S., Kim, Y.T. and Kim, D.K. (2017), "Advanced procedure for estimation of pipeline embedment on soft clay seabed", Struct. Eng. Mech., 62(4), 381-389. http://doi.org/10.12989/sem.2017.62.4.381.
  32. Zahari, M. and Dol, S. (2015), "Effects of different sizes of cylinder diameter on vortex-induced vibration for energy generation", J. Appl. Sci., 15(5), 783-791. http://dx.doi.org/10.3923/jas.2015. 783.791.
  33. Ziwa, M.Z., Kim, D.K., Mustaffa, Z. and Choi, H.S. (2017), "A systematic approach to pipe-in-pipe installation analysis", Ocean Eng., 142, 478-490. https://doi.org/10.1016/j.oceaneng.2017.07.004.