Abstract
The stability of steel top-tensioned risers is presented, considering parametric excitation and periodic vortex shedding excitation. Parametric instability is prone to be excited when the frequency of outside excitation and the natural frequency of offshore structures satisfy a certain condition. The prediction of parametric instability of top-tensioned risers in irregular waves based on Hill stability chart is urgently needed. The potential uncertainties of external loadings, geometry, and material properties, and consideration of periodic vortex excitation, make the analysis of instability a more challenging issue.
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2014. International Society of Offshore and Polar Engineers
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