Journal of Navigation and Port Research (한국항해항만학회지)

Korean Institute of Navigation and Port Research (한국항해항만학회)
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Numerical Study on the Coupled Responses of the Steel Lazy Wave Riser (SLWR) Based on the Basis of Design and Moored FPSO

BoD 기반의 Steel Lazy Wave Riser(SLWR)와 계류된 FPSO와의 연성해석에 관한 수치해석 연구

  • Kwon, Yong-Ju (Korea Research Institute of Ships & Ocean Engineering) ;
  • Nam, Bo Woo (Dept. of Naval Architecture and Ocean Engineering, Seoul National University) ;
  • Park, Byeong-Won (Korea Research Institute of Ships & Ocean Engineering) ;
  • Oh, Seung-Hoon (Korea Research Institute of Ships & Ocean Engineering) ;
  • Jung, Jae-Hwan (Korea Research Institute of Ships & Ocean Engineering) ;
  • Jung, Dongho (Korea Research Institute of Ships & Ocean Engineering)
  • Received : 2019.10.07
  • Accepted : 2019.11.19
  • Published : 2019.12.31
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Abstract

A coupled analysis was performed between the riser to develop oil and gas in ultra-deepwater and the moored floating body. In general, the safety of the riser is conservatively evaluated by considering the maximum offset excluding the coupled analysis with the floating body. In this study, the safety of the riser was analyzed by considering the coupled motion analysis of the moored floating body. The riser is considered steel lazy wave riser (SLWR) applied in the deep sea, and the floating body is determined to FPSO. The methodology was presented on coupled and uncoupled analysis. The coupled effects were analyzed according to the incident wave headings in intact and damaged conditions of mooring lines. The tension of mooring lines, the motion of the floating body, and riser responses were analyzed according to the loading conditions.

초심해역 자원개발용 라이저와 계류된 부유체와의 연성해석을 수행한다. 일반적으로 라이저의 안전성은 부유체와의 연성해석 없이 최대 offset을 고려한 해석을 통해 보수적으로 평가되는데, 본 연구에서는 계류된 부유체의 연성 운동해석을 고려하여 라이저의 안전성을 분석한다. 라이저는 초심해역에 적용되는 SLWR이 고려되며, 부유체는 FPSO가 적용된다. 연성을 고려하는 방법과 고려하지 않는 방법론에 대하여 제시한다. 계류선이 모두 안전한 정상상태(Intact) 조건과 사고(damaged) 조건을 고려하여, 각 조건에서 파랑 입사각도에 따라 연성해석 효과를 분석한다. 하중 조건에 따라 계류선의 장력, 부유체의 운동 및 라이저의 거동 등을 분석한다.

Keywords

References

  1. API Recommended Practive 2RD.(1998), "Design of Risers for Floating Production Systems (FPSs) and Tension-Leg Platforms (TLPs)", American Petroleum Institute, USA.
  2. Cozijn, J. L. and Bunnik, T. H. J.(2004), "Coupled Mooring Analysis for a Deep Water Calm Buoy", Proceedings of the ASME 2004 23rd International Conference on Offshore Mechanics and Arctic Engineering, Vancouver, Canada, OMAE2004-51370.
  3. Eom, T. S., Kim, M. H. and Bae, Y. H.(2014), "Local dynamic buckling of FPSO steel catenary riser by coupled time-domain simulations", Ocean Systems Engineering, Vol. 4, No. 3, pp. 215-241. https://doi.org/10.12989/ose.2014.4.3.215
  4. Heurtier, J. M., Buhan, P. L., Fontaine, E., Cunff, C. L., Biolley, F. and Berhault, C.(2001), "Coupled Dynamic Response of Moored FPSO with Risers", Proceedings of the Eleventh (2001) International Offshore and Polar Engineering Conference, Stavanger, Norway.
  5. Jo, C. H., Kim, D. Y., Hwang, S. J. and Rho, Y. H.(2014), "A Comparison of Coupled and Uncoupled Dynamic Analysis for the Flexible Riser in Shallow Water", Journal of the Korean Society of Marine Engineering, Vol. 38, No. 2, pp. 195-201. https://doi.org/10.5916/jkosme.2014.38.2.195
  6. Jung, J. H., Oh, S. H., Nam, B. W., Park, B. W., Kwon, Y. J. and Jung, D. H.(2019),"Numerical Study on Flow Characteristics Around Curved Riser". Journal of Ocean Engineering and Technology, Vol. 33, No. 2, pp. 123-130. https://doi.org/10.26748/KSOE.2018.079
  7. Kwon, Y. J., Nam, B. W., Kim, N. W., Park, I. B., Won, U. W, Hong, S. Y. and Shin, C. S.(2017), "Model Tests for Normal Laying Stage of J-lay Installation", Proceedings of the Korean Society of Ocean Engineers Conference, Guje, Korea.
  8. Oh, S. H., Jung, J. H., Park, B. W., Kwon, Y. J. and Jung, D. H.(2018), "Numerical Study on Estimation of Static Configuration of Steel Lazy Wave Riser Using Dynamic Relaxation Method", Journal of Ocean Engineering and Technology, Vol. 32, No. 6, pp. 466-473. https://doi.org/10.26748/KSOE.2018.32.6.466
  9. Park, B. W., Kwon, Y. J., Jung, J. H., Oh, S. H., and Jung, D. H.(2018), "Study on Initial Configuration of SLWR(Steel Lazy Wave Riser) considering internal flow density and seabed conditions", Offshore Plant Design Research Group 2018 Spring Workshop, Seoul, Korea.
  10. Park, B. W., Oh, S. H., Kwon, Y. J., Jung, J. H. and Jung, D. H.(2019), "Dynamic Analysis of SLWR Subjected to Internal Slug Flow Conditions", Proceedings of the Twenty-ninth (2019) International Offshore and Polar Engineering Conference, Honolulu, Hawaii, USA, pp. 1861-1867.
  11. Park, K. S., Choi, H. S., Kim, D. K., Yu, S. Y. and Kang, S. C.(2015), "Structural Analysis of Deepwater Steel Catenary Riser using OrcaFlex", Journal of Ocean Engineering and Technology, Vol. 29, No. 1, pp. 23-34.
  12. Szczepanski, D., Balash, C. and Martens, M.(2018), "A Steel Lazy Wave Riser for Turret VS. Spread-Moored FPSO in Extreme and Wave-Induced Fatigue Conditions", Proceedings of the ASME 2018 37th International Conference on Ocean, Offshore and Arctic Engineering, Madrid, Spain, OMAE2018-78736.
  13. Yoo, K. K. and Joo, Y. S.(2017), "Sensitivity Study on SCR Design for Spread-Moored FPSO in West Africa", Journal of Ocean Engineering and Technology, Vol. 31, No. 2, pp. 111-120. https://doi.org/10.5574/KSOE.2017.31.2.111