Dynamic analysis of fixed marine risers with 1st and 5th order Rogue Waves

Aidin Kazemi Daliri, Sepanta Naimi

Abstract


In offshore structures, risers are valuable constituents used in oil and gas industry. Conventional steel risers affect the deck of an offshore platform considerably due to their weight under the influence of environmental loads, impacting the fatigue and serviceability life of the structure. The study of behavior of the risers in extra critical environmental conditions could be contributory to developing the effective economical alternatives to boost up the serviceability life of the structure. To this aim, in the current study, a traditional Gas Export Riser, Oil Export Riser and also a Thermoplastic Composite Pipe as a new material in offshore applications are assumed for an offshore jacket located in the North Sea. To simulate the extra critical condition, a Rogue Wave has been considered. The Rogue Wave with return period of 100 years has been exerted on the mentioned risers by dynamic analysis in the time domain with finite element method using ANSYS software. For an accurate analysis, two well-known wave theories including the 1st and 5th order wave theories are utilized. Afterwards, the displacements and in particular reaction forces of the mentioned risers were compared. It is shown that for Gas Export Riser and Oil Export Riser, 5th order wave places less force on the main deck of the offshore jacket in comparison to the 1st order wave. Also, Thermoplastic Composite Pipe response to Rogue Wave has a minimal effect on the deck structure as compared to the Gas Export Riser and Oil Export Riser.


Keywords


Dynamic analysis; riser; thermoplastic; offshore jacket; Rogue Wave.

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References


DNV-OSS-302 Standard, 2010. Offshore Risers Systems, Offshore Service Specifications.

Mirtaheri, M., Zakeri, H.A., Alanjari, P. & Assareh, M.A., 2009. Effect of joint flexibility on overall behavior of jacket type offshore platforms. American Journal of Engineering and Applied Sceinces, 2: 25-30.

Saleem, Z., 2011. Alternatives and modifications of Monoplie foundation or its installation technique for noise mitigation. TUDelft Report, Delft University of Technology.

Ochoa, O.O. & Salama, M.M., 2005. Offshore composites: transition barriers to an enabling technology. J. Composite Science and Technology, 65: 2588-96.

Dalmolen, L.G.P., Kruyer, M. & Cloos, P.J., 2009. Offshore application of reinforced thermoplastic pipe (RTP). Proceedings of the 4th Asian conference and exhibition. Kuala Lumpur, Malaysia.

Yu, K., Morozov, E.V., Ashraf, M.A. & Shankar, K., 2015. Analysis of flexural behaviour of reinforced thermoplastic pipes considering material nonlinearity. J. Composite Structures, 119:385-393.

Van Onna, M., de Kanter, J. & Steuten, B., 2012. Advancements in thermoplastic composite riser development. Proceedings of the ASME 2012 31st International Conference on Ocean, Offshore and Arctic Engineering. Rio de Janeiro, Brazil.

Haritos, N., 2007. Introduction to the analysis and design of offshore structures - an overview. Electronic J. Struct. Eng.-EJSE, Special Issue: Loading on Structures, University of Melbourne, 7: 55-65.

Bargi, K., Hosseini S. R., Tadayon, M.H. & Sharifian H., 2011. Seismic Response of a Typical Fixed Jacket-Type Offshore Platform (SPD1) under Sea Waves. Open Journal of Marine Science, 1: 36-42.

Arena F. & Guedes Soares C., 2009. Nonlinear high wave groups in bimodal sea states. Journal of waterway port coastal and ocean engineering, 135: 69-79.

Dean, R. G. & Dalrymple, R. A., 1991. Water Wave Mechanics for Engineers and Scientists. World Scientific.

Benaroya H., Mi Han S. & Nagurka M., 2005. Probability Models in Engineering and Science. CRC Press.

Le Roux, J.P., 2007. An extension of the Airy theory for linear waves into shallow water. J. Coastal Engineering, 55: 295–301.

Le Roux, J.P., 2008. Profiles of fully developed (Airy) waves in different water depths. J. Coastal Engineering, 55:701-703.

Le Mehaute. B. & M Hanes, D., 2005. The Sea: Ideas and Observations on Progress in the Study of the Seas. Ocean Engineering Science. Harvard University Press.

Skjelbreia, L. & Hendrickson, J., 1960. Fifth order gravity wave theory. Proceedings of 7th conference on coastal engineering. Hague, Netherlands.

Teng, B. & Ning, D. Z., 2009. A simplified model for extreme-wave kinematics in deep sea. Journal of Marine Science and Application, 8: 27-32.

Harif, C., Pelinovsky, E., Slunyaev, A., 2009. Rogue waves in the ocean. Advances in Geophysical and Environmental Mechanics and Mathematics. Springer.

Chabchoub, A., Hoffmann, N. & Akhmediev N., 2011. Rogue wave observation in a water wave tank. Physical Review Letters, 106: 204502.

Chabchoub, A., Akhmediev, N. & Hoffmann N., 2012. Experimental study of spatiotemporally localized surface gravity water waves. Physical Review E, 86: 016311.

Onorato, M., Proment, D., Clauss, G. & Klein, M., 2013. Rogue waves: from nonlinear Schrodinger breather solutions to sea-keeping test. Plos One, 8: pp. e54629.

Pattipawaej, O., 2006. Modeling uncertainty in the dynamic response of marine riser using probabilistic finite element technique. International Civil Engineering Conference. Surabaya, Indonesia.

Naimi, S., Celikag, M. & A. Hedayat, A., 2013. Ductility Enhancement of Post-Northridge Connections by Multilongitudinal Voids in the Beam Web. The Scientific World Journal. Doi: 10.1155/2013/515936.

ANSYS Inc. http://www.ansys.com.

Low, Y.M., 2009. Frequency domain analysis of a tension leg platform with statistical linearization of the tendon restoring forces. Marine Structures, 22: 480-503.

Chaudhuri, R.A., Balaraman, K., & V. X. Kunukkasseril, V.X., 1986. Arbitrarily Laminated Anisotropic Cylindrical Shell under Internal Pressure. AIAA Journal, 24: pp. 1851-1858.

Chaudhuri, R.A., K. Balaraman, K. & V. X. Kunukkasseril, V.X., 2008. Admissible Boundary Conditions and Solutions to Internally Pressurized Thin Arbitrarily Laminated Cylindrical Shell Boundary-Value Problems. Composite Structures, 86: pp. 385-400.

Chaudhuri, R.A., A. S. Oktem, A.S. & Guedes Soares, C., 2015. Beam-Column and Tie-Bar Effects in Internally Pressurized Thin Arbitrarily Laminated Cantilever Cylindrical Shells,” ASCE J. Engineering Mechanics, 141. Doi:10.1061/(ASCE)EM.1943-7889.0000763.

Akhmediev, N., Ankiewicz, A. & Taki, M., 2009. Waves that appear from nowhere and disappear without a trace, Phys. Lett. A, 373: 675-678.

Akhmediev, N., Dudely, J.M., Solli, D.R. & Turitsyn, S.K., 2013. Recent progress in investigating optical rouge waves, Journal of Optics, 15.

Ying, L.H. & Kaplan, L., 2012. Systematic study of rogue wave probability distributions in a fourth-order nonlinear Schrödinger equation. Journal of Geophysical Research, 117.

Rouge Waves, 2009. Monsters of the deep: Huge, freak waves may not be as rare as once thought. Economist Magazine.

Adcock, T. A. A., Taylor, P. H., Yan, S., Ma, Q.W. & Janssen, P. A. E. M., 2011. Did the Draupner wave occur in a crossing sea? Proceedings of the Royal Society A, 467: 3004-3021.

Ciceron, 2014. http://www.ciceron.com/2014/12/magical-year-1995-reminiscing-past-20-years-ciceron-internet/

Van Raaij, K. & Gudmestad, O.T., 2007. Wave in deck loading on fixed steel jacket decks, Marine Structures, 20: 164-184.

Sorensen, M. R., 2006. Basic Coastal Engineering, Springer.

API Standard, 2000. Recommended Practice for Planning, Designing and Constructing Fixed Offshore Platforms, Working Stress Design.

Wilson, J. F., 2003. Dynamics of Offshore Structures, John Wiley and Sons.


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