In this study, a new design wave analysis method for estimating the extreme slow-drift motion of floating offshore structures is introduced. Here, the design wave refers to the irregular incident wave of short duration that induces the extreme response of desired return period. The present method is composed of following four steps: linearization of the dynamic system, probabilistic analysis of the Volterra series, generation of the design waves, and the fully-coupled nonlinear time-domain simulations. In generating the design waves, the conditioning of the most likely extreme response profile is suggested. The method was applied to a deep-water semi-submersible platform, and the results appeared to be promising compared to the full-length nonlinear simulations.
- Ocean, Offshore and Arctic Engineering Division
Design Wave Analysis for the Extreme Horizontal Slow-Drift Motion of Moored Floating Platforms
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Lim, D, & Kim, Y. "Design Wave Analysis for the Extreme Horizontal Slow-Drift Motion of Moored Floating Platforms." Proceedings of the ASME 2018 37th International Conference on Ocean, Offshore and Arctic Engineering. Volume 9: Offshore Geotechnics; Honoring Symposium for Professor Bernard Molin on Marine and Offshore Hydrodynamics. Madrid, Spain. June 17–22, 2018. V009T13A021. ASME. https://doi.org/10.1115/OMAE2018-78582
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