This paper presents a multiphysics approach for characterizing flow-induced vibrations (FIVs) in a subsea jumper subject to internal production flow, downstream slug, and ocean current. In the present study, the physical properties of production fluids and associated slugging behavior were characterized by pvtsim and olga programs under real subsea condition. Outcomes of the flow assurance studies were then taken as inputs of a full-scale two-way fluid–structure interaction (FSI) analysis to quantify the vibration response. To prevent onset of resonant risk, a detailed modal analysis has also be carried out to determine the modal shapes and natural frequencies. Such a multiphysics approach actually integrated the best practices currently available in flow assurance (olga and pvtsim), computational fluid dynamics (CFD), finite element analysis (FEA), and modal analysis, and hence provided a comprehensive solution to the FSI involved in a subsea jumper. The corresponding results indicate that both the internal production flow, downstream slugs, and the ocean current would induce vibration response in the subsea jumper. Compared to the vortex-induced vibration (VIV) due to the ocean current and the FIV due to the internal production flow, pressure fluctuation due to the downstream slug plays a dominant role in generating excessive vibration response and potential fatigue failure in the subsea jumper. Although the present study was mainly focused on the subsea jumper, the same approach can be applied to other subsea components, like subsea flowline, subsea riser, and other subsea production equipment.
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April 2016
Research-Article
Flow-Induced Vibration in Subsea Jumper Subject to Downstream Slug and Ocean Current
Yaojun Lu,
Yaojun Lu
Bechtel Corporation,
Houston, TX 77056
Houston, TX 77056
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Chun Liang,
Chun Liang
Bechtel Corporation,
Houston, TX 77056
Houston, TX 77056
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Juan J. Manzano-Ruiz,
Juan J. Manzano-Ruiz
Bechtel Corporation,
Houston, TX 77056
Houston, TX 77056
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Kalyana Janardhanan,
Kalyana Janardhanan
Bechtel Corporation,
Houston, TX 77056
Houston, TX 77056
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Yeong-Yan Perng
Yeong-Yan Perng
ANSYS, Inc.,
Austin, TX 78746
Austin, TX 78746
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Yaojun Lu
Bechtel Corporation,
Houston, TX 77056
Houston, TX 77056
Chun Liang
Bechtel Corporation,
Houston, TX 77056
Houston, TX 77056
Juan J. Manzano-Ruiz
Bechtel Corporation,
Houston, TX 77056
Houston, TX 77056
Kalyana Janardhanan
Bechtel Corporation,
Houston, TX 77056
Houston, TX 77056
Yeong-Yan Perng
ANSYS, Inc.,
Austin, TX 78746
Austin, TX 78746
Contributed by the Ocean, Offshore, and Arctic Engineering Division of ASME for publication in the JOURNAL OF OFFSHORE MECHANICS AND ARCTIC ENGINEERING. Manuscript received June 16, 2014; final manuscript received November 17, 2015; published online February 24, 2016. Editor: Solomon Yim.
J. Offshore Mech. Arct. Eng. Apr 2016, 138(2): 021302 (10 pages)
Published Online: February 24, 2016
Article history
Received:
June 16, 2014
Revised:
November 17, 2015
Citation
Lu, Y., Liang, C., Manzano-Ruiz, J. J., Janardhanan, K., and Perng, Y. (February 24, 2016). "Flow-Induced Vibration in Subsea Jumper Subject to Downstream Slug and Ocean Current." ASME. J. Offshore Mech. Arct. Eng. April 2016; 138(2): 021302. https://doi.org/10.1115/1.4032225
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