Vortex-induced-vibration of jack-ups with cylindrical legs in regular waves
Ramadasan, Sudheesh and Tao, Longbin and Dev, Arun Kr; (2019) Vortex-induced-vibration of jack-ups with cylindrical legs in regular waves. In: ASME 2019 38th International Conference on Ocean, Offshore and Arctic Engineering. American Society of Mechanical Engineers (ASME), GBR. ISBN 9780791858769 (https://doi.org/10.1115/OMAE2019-95764)
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Abstract
A simple mathematical model is developed based on the single-degree-of-freedom analogy and principle of conservation of energy evaluating various modes of Vortex-Induced-Vibration (VIV) of a jack-up with cylindrical legs in regular waves. Similar to uniform current, mass ratio, damping ratio and mode factor are found to be the important parameters controlling the cross-flow VIV and radius of gyration also for the yaw VIV. Criteria for the initiation of the mentioned VIV modes are developed for the cases of a single 2D cylinder experiencing planar oscillatory flow, four rigidly coupled 2D cylinders in rectangular configuration experiencing planar oscillatory flow and jack-up experiencing regular waves. The newly developed VIV model is validated by a set of experiments conducted in a wind, wave and current flume. The importance of mass damping parameter is further demonstrated in suppressing VIV in regular waves. The mathematical method will equip engineers to consider the effect of VIV due to regular waves in jack-up designs.
ORCID iDs
Ramadasan, Sudheesh, Tao, Longbin ORCID: https://orcid.org/0000-0002-8389-7209 and Dev, Arun Kr;-
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Item type: Book Section ID code: 71860 Dates: DateEvent11 November 2019Published11 February 2019AcceptedSubjects: Technology > Hydraulic engineering. Ocean engineering Department: Faculty of Engineering > Naval Architecture, Ocean & Marine Engineering Depositing user: Pure Administrator Date deposited: 24 Mar 2020 12:12 Last modified: 15 Oct 2024 00:14 Related URLs: URI: https://strathprints.strath.ac.uk/id/eprint/71860