The air gap response of a specific semi-submersible platform subjected to irregular waves is considered. Detailed model tests for this structure are studied in depth. Using time-histories of both motions and air gap, statistical analyses both for the absolute near-structure wave elevation (with respect to a fixed observer), and the relative wave elevation (with respect to the moving structure) are performed. Statistics of wave crest amplification, due to diffraction, are established. Corresponding amplification factors are derived from linear diffraction theory, and the results of theory and observations are critically compared.
Air Gap Response of Floating Structures: Statistical Predictions Versus Observed Behavior
Contributed by the OMAE Division and presented at the 18th International Symposium and Exhibit on Offshore Mechanics and Arctic Engineering, St. Johns, Newfoundland, Canada, July 11–16, 1999, of THE AMERICAN SOCIETY OF MECHANICAL ENGINEERS. Manuscript received by the OMAE Division, March 10, 2000; revised manuscript received March 20, 2001. Associate Editor: A. Naess.
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Winterstein, S. R., and Sweetman, B. (March 20, 2001). "Air Gap Response of Floating Structures: Statistical Predictions Versus Observed Behavior ." ASME. J. Offshore Mech. Arct. Eng. August 2001; 123(3): 118–123. https://doi.org/10.1115/1.1377867
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