Nonlinear Analysis of Vortex Induced Dynamic Response of Marine Riser

Abstract:

Vortex-induced dynamic response is the most important issue influencing marine riser. This paper presents an investigation on the vortex-induced nonlinear dynamic response of marine riser subjected to combined waves,currents and platform movement. The in-line force was solved by Morison equation under combined waves,currents and platform movement while cross-flow force was solved by wake oscillator model. Updated Lagrangianmethod was used to solve the nonlinear problem.The governing equations were discretized by finite element method and solved by Newmark-β method in time domain. Influence of nonlinearity, comparisons of vortex-induced dynamic responses under different boundary conditions and different flow profiles were discussed.

• Periodical: Applied Mechanics and Materials (Volumes 353-356)
• Pages: 2736-2740
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.353-356.2736
• Online since: August 2013
• Authors: Lin Lin, Yan Ying Wang
• Keywords: Dynamic Response, Nonlinearity, Vortex-Induced Vibration (VIV), Wake Oscillator Model

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