Numerical and experimental analysis of the static behavior of highly deformed risers |
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| Authors: | ST Santillan |
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| Institution: | a Department of Mechanical Engineering, United States Naval Academy, Annapolis, MD 21402, United States
b Mechanical Engineering and Materials Science, Duke University, Durham, NC 27708, United States |
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| Abstract: | This paper models a slender, flexible structure used as a drill string or riser in the offshore oil and gas industry that connects the well-head with a floating control vessel. These systems are used in deep-water drilling applications and present considerable design challenges due to their extreme flexibility and susceptibility to buckling and vibration. Two typical configurations are used (Bai and Bai, 2005), with a common feature involving the attachment of a buoy designed to relieve some of the axial forces acting on the riser, especially at the attachment points. Previous work by the authors studied numerical results of small-amplitude vibrations and two other equilibrium configurations using parameter values that closely resemble the full-scale application (Santillan et al., 2008). Here, two new configurations are considered, and experiments are designed and conducted to verify these equilibrium results. |
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| Keywords: | Geometric nonlinearity Elastica Finite differences Flexible riser |
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