Numerical analysis of varies geometries on dynamic analysis on the gravity platform

Authors

  • Tina Rezaei M.Sc. Student of Hydraulic Structures, Azad University, Science and Research Branch, Faculty of Water Engineering, Tehran, Iran
  • Atefeh Mosahebi Mohammadi M.Sc. Student of Hydraulic Structures, Azad University, Science and Research Branch, Faculty of Water Engineering, Tehran, Iran
  • Elham Mina Ph.D Student of Hydraulic Structures, Tarbiat Modares University, Faculty of Environmental Civil Engineering, Tehran, Iran
  • Mohammad Reza Kavianpour Professor, K.N.T. University of Technology, Faculty of Civil Engineering, Tehran, Iran

DOI:

https://doi.org/10.15649/2346075X.764

Keywords:

gravity-based structures (GBS) hydrodynamic, Ansys Aqwa, JONSWAP, rocking fluctuation

Abstract

On Gravity platform Dynamic Response is a support structure held in place by gravity. Given that the gravity platforms are supported
by the sea bed but not attached to the ground, the motion of them is known as a rocking fluctuation. During the fluctuations, the
platform maybe overturned if the angle is large. In this study, using Ansys Aqwa hydrodynamic software and analytical methods with
regard to the performance, the dynamic interaction of platform’s geometry on hydrodynamic forces have been simulated. The
objective of this study was to analyze the hydrodynamic parameters of the sea and rocking fluctuations of gravity platforms under the
impact of regular wave’s moment considering the soil mechanics and hydrodynamic features of the structure. In order to achieve
the objective the hydrodynamic forces using numerical simulations and analytical methods for one column and three hollow columns
platforms were analyzed. Finally, responses of the platform to irregular waves were studied using numerical simulation. The results
showed that with the increasing of the depth, the impact of wave’s force and moment on the base of platform are reduced through
exponential relationship. The reductions are due to the effective depth that is equal to half the wave length. The results suggest
that the response of the rocking motion of gravity platform shows significant changes in relation to height and wavelength. Based on
the curves fitted to the data of the fluctuation angle, sustainability of the platform in the rocking motion can be thoroughly and
completely investigated.

Author Biographies

Tina Rezaei, M.Sc. Student of Hydraulic Structures, Azad University, Science and Research Branch, Faculty of Water Engineering, Tehran, Iran

M.Sc. Student of Hydraulic Structures, Azad University, Science and Research Branch, Faculty of Water Engineering, Tehran, Iran.

Atefeh Mosahebi Mohammadi, M.Sc. Student of Hydraulic Structures, Azad University, Science and Research Branch, Faculty of Water Engineering, Tehran, Iran

M.Sc. Student of Hydraulic Structures, Azad University, Science and Research Branch, Faculty of Water Engineering, Tehran, Iran

Elham Mina, Ph.D Student of Hydraulic Structures, Tarbiat Modares University, Faculty of Environmental Civil Engineering, Tehran, Iran

Ph.D Student of Hydraulic Structures, Tarbiat Modares University, Faculty of Environmental Civil Engineering, Tehran, Iran

Mohammad Reza Kavianpour, Professor, K.N.T. University of Technology, Faculty of Civil Engineering, Tehran, Iran

Professor, K.N.T. University of Technology, Faculty of Civil Engineering, Tehran, Iran

References

Dean, E. T. R., “Offshore Geotechnical Engineering”, 1st edition, Thomas Telford Limited, 2010.

Wilson, J. F., “Dynamics of Offshore Structures”, John Wiley & Sons, 2003.

McCormick, M. E., “Ocean Engineering Mechanics”, Cambridge University Press, 2010.

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Stansberg, C. T., Baarholm, R., Fokk, T., Gudmestad, O. T., Haver, S., “Wave amplification and possible deck impact on gravitybased structure in probability extreme crest heights”, 23rd international conference on offshore mechanics and arctic engineering, 2004. https://doi.org/10.1115/OMAE2004-51506

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Revista Innovaciencia Facultad de Ciencias Exactas, Físicas y Naturales

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Published

2019-10-25

How to Cite

Rezaei, T. ., Mohammadi, A. M. ., Mina, E. ., & Reza Kavianpour, M. . (2019). Numerical analysis of varies geometries on dynamic analysis on the gravity platform. Innovaciencia, 7(2). https://doi.org/10.15649/2346075X.764

Issue

Vol. 7 No. 2 (2019)

Section

Original research and innovation article
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