Umbilical is an important equipment in the subsea production to supply a connection between the floater and the subsea well. Analyzing strength and fatigue behaviors under bending is a key requirement to assure safety. An analytical model is proposed for predicting the bending behavior of a steel tube wounded helically around a frictionless cylinder. A full three-dimensional (3D) finite element (FE) model of an umbilical is developed by considering the frictions and contacts among its components. The numerical results of the bending stress of a steel tube were validated against that of the analytical model. The impacts of friction coefficients on the bending stress, contact pressure, and friction stress have been further investigated by the established FE model.
A Finite Element Model for Prediction of the Bending Stress of Umbilicals
Contributed by the Ocean, Offshore, and Arctic Engineering Division of ASME for publication in the JOURNAL OF OFFSHORE MECHANICS AND ARCTIC ENGINEERING. Manuscript received January 14, 2017; final manuscript received May 27, 2017; published online July 6, 2017. Assoc. Editor: Theodoro Antoun Netto.
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Lu, Q., Yang, Z., Yan, J., Lu, H., Chen, J., and Yue, Q. (July 6, 2017). "A Finite Element Model for Prediction of the Bending Stress of Umbilicals." ASME. J. Offshore Mech. Arct. Eng. December 2017; 139(6): 061302. https://doi.org/10.1115/1.4037065
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