Extreme Wave Amplification and Impact Loads on Offshore Structures
C.T. Stansberg, R. Baarholm, T. Kristiansen / MARINTEK; E.W.M. Hansen, G. Rortveit / Complex Flow Design A.S.
Copyright 2005, Offshore Technology Conference
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The prediction of air-gap and deck impact on column-based
platforms in steep and high waves is addressed. Numerical
models based on linear and second-order diffraction-radiation
analysis are validated against model test data, for various cases
including fixed as well as floating structures. Significant
higher-order effects are identified from systematic variations
in the wave steepness. Wave-in-deck impact loads are
modelled by a simple formulation similar to Kaplan’s
approach, but taking into account amplification effects from
the large-volume hull. Predicted load time series