Modeling the Response of Flexible Risers in the Quasi-steady Regime

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Flexible risers are becoming increasingly important for deep-sea oil production. In addition, current attempts directed towards global warming mitigation target the use of flexible risers for carbon dioxide injection in deep waters. The main difficulties arise from the highly nonlinear behavior and self-regulated nature of flexible risers in marine environments. This paper presents the experimental validation of a response prediction model in the quasi-steady regime. A 20-meter riser model, pinned at its both ends with a constant tension force at its top end, is sinusoidally excited at values of Keulegan-Carpenter Number located in the quasi-steady regime. Good agreement in amplitude response is obtained between experimental data and simulation results.
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