The Response of Marine Riser to the Variation of Diameter and Wave Height

  IJETT-book-cover  International Journal of Engineering Trends and Technology (IJETT)          
© 2020 by IJETT Journal
Volume-68 Issue-6
Year of Publication : 2020
Authors : Iberahin Jusoh
DOI :  10.14445/22315381/IJETT-V68I6P202S


MLA Style: Iberahin Jusoh "The Response of Marine Riser to the Variation of Diameter and Wave Height" International Journal of Engineering Trends and Technology 68.6(2020):9-12. 

APA Style:Iberahin Jusoh.The Response of Marine Riser to the Variation of Diameter and Wave Height  International Journal of Engineering Trends and Technology, 68(6),9-12.

Environmental loads are known to have exerted the highest load on marine riser attached to a jacket structure. These loads have to be properly considered and given a suitable allowance at the design stage of the structure. In this paper, the effects of wave height variation on the response of vertical steel marine riser attached to the jacket structure were investigated. Several wave heights selected to investigate the response behavior of a vertical steel marine riser to environmental loading. Due to the slender nature of the riser, the response shows its sensitivity to the variation of wave height. The 6 in diameter riser experienced maximum horizontal deformation of 139 mm under extreme wave height of 10 m. The maximum magnitude of stress developed within the riser is 129 MPa at the topside connection at element 82. The maximum stress utilization is found to be 0.2945 and this indicates that the riser is operating within a safe strength capacity. The results from this study show the stress distribution along the riser length that gives important information on the location of critical elements and associated stress magnitude to be considered in design and analysis.


[1] Wilson, J.F., Dynamics of Offshore Structures, Second Edition. John Wiley & Sons, Inc., 2000.
[2] Reddy, D.V. and Swamidas, A.S.J., Essential of Offshore Structure: Frame and Gravity Platforms, CRC Press, Taylor and Francis Group. 2014.
[3] Patel, M.H., Sarohia, S. and Ng, K.F., "Finite-element analysis of the marine riser”. Engineering Structures, Vol. 6, Issue 3, Elsevier, July 1984.
[4] Joseph, R.S., Wang, J., Ong, M.C. and Jakobsen, J.B., "Vortex-induced vibration (VIV) effects of a drilling riser due to vessel motion" First Conference of Computational Methods in Offshore Technology (COTech2017) IOP Publishing IOP Conf. Series: Materials Science and Engineering, 2017.
[5] Hong, K and Shah, U.H., "Vortex-induced vibration and control off marine riser: A review". Ocean Engineering, 2018.
[6] Kang, Y., Xio, W. and Zhao, J.; "Suppression of vortex-induced vibration by fairing on marine riser". Journal of Ocean Univerity of China, 2020.
[7] Jusoh, 1., "The Stress of Marine Riser on Jacket Structure". International Journal of Engineering Trends and Technology, 68(4), May 2020 pp.23-26.
[8] Morison, J. R.; O`Brien, M. P.; Johnson, J. W.; Schaaf, S. A. (1950), "The force exerted by surface waves on piles", Petroleum Transactions, American Institute of Mining Engineers, 189: 149–154
[9] Chakrabarti, S. K., "Hydrodynamics of offshore structures", Computational Mechanics Publications. London, 1994.
[10] Jusoh, I., “Environmental loading conditions and response of an offshore structure”. Journal of the Institution of Engineers, Malaysia, 1999.

marine riser, deformation, stress, wave height, hydrodynamics load.