Improving time-domain prediction of vortex-induced vibration of marine risers

Abstract

As offshore exploration and production is moving into deepwaters, the prediction of the Vortex-Induced Vibration (VIV) of marine risers becomes a critical issue in the design process. VIV can lead to a reduced fatigue life and even the structural failure of the riser. Currently, frequency-domain models are widely used in the offshore industry to predict riser VIV. However, the nonlinearities encountered in complex deepwater environments make linear approaches unreliable. In contrast, time-domain models Table of Contents Abstract ii Acknowledgments iv Table of Contents viii List of Tables ix List of Figures xiv Nomenclature xiv σ Root-mean-square operator ω Cross-flow motion angular frequency xx