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Coupling response of heave and moonpool water motion of a truss Spar platform in random waves

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Abstract

This paper presents the heave responses and the moonpool water motions of a truss Spar platform with semi-closed moonpool in random waves. A 2-DOF (degree of freedom) coupling dynamical equations of the platform heave and vertical motions of the moonpool water are derived. The linear wave theory is used to simulate the random waves. The response statistical values and the power spectrums are calculated to analyze the mutual influences between the platform heave and the moonpool water motions for different opening ratios of the moonpool. The effect of coupling parameters on the platform heave and the moonpool water motions are analyzed. The results show that motions of the moonpool water significantly affected the platform heave when the characteristic wave period is far away from the natural period of the platform heave, and different moonpool opening ratios lead to different heave amplitudes of the platform. In the actual design, an optimized moonpool opening ratio can be designed to reduce heave motions of the platform.

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References

  • Barreira, R., Sphaier, S. H. and Masetti, I. Q., 2005. Behavior of a mono-column structure (monobr) in waves, Proc. 24th Int. Conf. Offshore Mech. Arct. Eng., ASME, Halkidiki, Greece, 867–873.

    Chapter  Google Scholar 

  • DNV (Det Norske Veritas), 2010. Global Performance Analysis of Deepwater Floating Structures, DNV-RP-F205, Høvik: Det Norske Veritas.

    Google Scholar 

  • Gupta, H., Blevins, R. and Banon, H., 2008. Effect of moonpool hydrodynamics on spar heave, Proc. 27th Int. Conf. Offshore Mech. Arct. Eng., ASME, Estoril, Portugal, 275–282.

    Google Scholar 

  • Kristiansen, T. and Faltinsen, O. M., 2012. Gap resonance analyzed by a new domain-decomposition method combining potential and viscous flow, Appl. Ocean Res., 34(1): 198–208.

    Article  Google Scholar 

  • Li, B. B. and Ou, J. P., 2009. Heave response analysis of truss Spar in frequency domain, The Ocean Engineering, 27(1): 8–15. (in Chinese)

    Google Scholar 

  • Liu, L. Q., Zhang, Y. H., Man, J. S., Liu, C. Y. and He, X., 2015. Model experimental research on the coupled motion of heave and moonpool water of Spar platform, Journal of Harbin Engineering University (in press). (in Chinese)

    Google Scholar 

  • Mansouri, R. and Hadidi, H., 2009. Comprehensive study on the linear hydrodynamic analysis of a truss spar in random waves, World Academy of Science, Engineering and Technology, 53, 930–942.

    Google Scholar 

  • McIver, P., 2005. Complex resonances in the water-wave problem for a floating structure, J. Fluid Mech., 536, 423–443.

    Article  MATH  MathSciNet  Google Scholar 

  • Molin, B., 2001. On the piston and sloshing modes in moonpools, J. Fluid Mech., 430, 27–50.

    Article  MATH  MathSciNet  Google Scholar 

  • Perryman, S., Gebara, J., Botros, Fikry. and Yu, A., 2005. Holstein truss spar and top tensioned riser system design challenges and innovations, Offshore Technology Conference, Houston, USA, 1–13.

    Google Scholar 

  • Petter, A. B., 2000. Dynamic Response Analysis of A Truss Spar in Waves, Ph. D. Thesis, University of Newcastle.

    Google Scholar 

  • Spanos, P. D., Nava, V. and Arena, F., 2011. Coupled surge-heave-pitch dynamic modeling of spar-moonpool-riser interaction, J. Offshore Mech. Arct. Eng., 133(2): 021301.

    Article  Google Scholar 

  • Sphaier, S. H., Torres, F. G. S., Masetti, I. Q., Costa, A. P. and Levi, C., 2007. Monocolumn behavior in waves: Experimental analysis, Ocean Eng., 34(11): 1724–1733.

    Article  Google Scholar 

  • Weggel, D. C. and Roesset, J. M., 1994. Vertical hydrodynamic forces on truncated cylinders, Proc. 4th Int. Offshore Polar Eng. Conf., Osaka, Japan, 210–217.

    Google Scholar 

  • Yu, Y. X., 2000. Random Wave and Its Application for Engineering, Dalian University of Technology Press, Dalian, China. (in Chinese)

    Google Scholar 

  • Zhang, H. S. and Zhou, H. W., 2013. Wave radiation and diffraction by a two-dimensional floating body with an opening near a side wall, China Ocean Eng., 27(4): 437–450.

    Article  Google Scholar 

Download references

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Authors and Affiliations

  1. State Key Laboratory of Hydraulic Engineering Simulation and Safety, Tianjin University, Tianjin, 300072, China

    Li-qin Liu  (刘利琴), Han Zhou  (周 晗) & You-gang Tang  (唐友刚)

Authors
  1. Li-qin Liu  (刘利琴)
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  2. Han Zhou  (周 晗)
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  3. You-gang Tang  (唐友刚)
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Corresponding author

Correspondence to Li-qin Liu  (刘利琴).

Additional information

The project was financially supported by the National Natural Science Foundation of China (Grant No. 51179125) and the Innovation Foundation of Tianjin University (Grant No. 1301).

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Liu, Lq., Zhou, H. & Tang, Yg. Coupling response of heave and moonpool water motion of a truss Spar platform in random waves. China Ocean Eng 29, 169–182 (2015). https://doi.org/10.1007/s13344-015-0013-3

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  • DOI: https://doi.org/10.1007/s13344-015-0013-3

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