Ocean Systems Engineering

  • 제4권3호
  • /
  • Pages.215-241
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  • 2014
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  • 2093-6702(pISSN)
  • /
  • 2093-677X(eISSN)
테크노프레스 (Techno-Press)
권호 표지
DOI QR코드

DOI QR Code

Local dynamic buckling of FPSO steel catenary riser by coupled time-domain simulations

  • Eom, T.S. (Texas A&M University, College Station) ;
  • Kim, M.H. (Texas A&M University, College Station) ;
  • Bae, Y.H. (Texas A&M University, College Station) ;
  • Cifuentes, C. (Texas A&M University, College Station)
  • 투고 : 2014.08.18
  • 심사 : 2014.08.25
  • 발행 : 2014.09.25
⟨ 이전 논문 다음 논문 ⟩

초록

Steel catenary riser (SCR) is a popular/economical solution for the oil/gas production in deep and ultra-deep water. The behavioral characteristics of SCR have a high correlation with the motion of floating production facility at its survival and operational environments. When large motions of surface floaters occur, such as FPSO in 100-yr storm case, they can cause unacceptable negative tension on SCR near TDZ (touch down zone) and the corresponding elastic deflection can be large due to local dynamic buckling. The generation, propagation, and decay of the elastic wave are also affected by SCR and seabed soil interaction effects. The temporary local dynamic buckling vanishes with the recovery of tension on SCR with the upheaval motion of surface floater. Unlike larger-scale, an-order-of-magnitude longer period global buckling driven by heat and pressure variations in subsea pipelines, the sub-critical local dynamic buckling of SCR is motion-driven and short cycled, which, however, can lead to permanent structural damage when the resulting stress is greatly amplified beyond the elastic limit. The phenomenon is extensively investigated in this paper by using the vessel-mooring-riser coupled dynamic analysis program. It is found that the moment of large downward heave motion at the farthest-horizontal-offset position is the most dangerous for the local dynamic buckling.

키워드

참고문헌

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  4. A finite element analysis for unbonded flexible risers under bending loads vol.5, pp.2, 2015, https://doi.org/10.12989/ose.2015.5.2.077
  5. Conceptual Design of a Riser for 10 MW OTEC vol.18, pp.1, 2015, https://doi.org/10.7846/JKOSMEE.2015.18.1.29
  6. Dynamic Effect of a Flexible Riser in a Fully Connected Semisubmersible Drilling Rig Using the Absolute Nodal Coordinate Formulation vol.139, pp.5, 2017, https://doi.org/10.1115/1.4037084
  7. BoD 기반의 Steel Lazy Wave Riser(SLWR)와 계류된 FPSO와의 연성해석에 관한 수치해석 연구 vol.43, pp.6, 2014, https://doi.org/10.5394/kinpr.2019.43.6.344
  8. Methodology for simulation of the post-failure behavior of flexible catenary risers vol.82, pp.None, 2014, https://doi.org/10.1016/j.marstruc.2021.103142