Irregular Wave Forces on Monopile Foundations. Effect af Full Nonlinearity and Bed Slope

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Abstract

Forces on a monopile from a nonlinear irregular unidirectional wave model are investigated. Two seabed profiles of different slopes are considered. Morison’s equation is used to investigate the forcing from fully nonlinear irregular waves and to compare the results with those obtained from linear wave theory and with stream function wave theory. The latter of these theories is only valid on a flat bed. The three predictions of wave forces are compared and the influence of the bed slope is investigated. Force-profiles of two selected waves from the irregular wave train are further compared with the corresponding forceprofiles from stream function theory. The results suggest that the nonlinear irregular waves give rise to larger extreme wave forces than those predicted by linear theory and that a steeper bed slope increases the wave forces both for linear and nonlinear waves. It is further found that stream function theory in some cases underestimate the wave forces acting on the monopile.
Original languageEnglish
Title of host publicationProceedings of the ASME 30th 2011 International Conference on Ocean, Offshore and Arctic Engineering
Volume5
PublisherAmerican Society of Mechanical Engineers
Publication date2011
Pages581-588
ISBN (Print)9780791844373
Publication statusPublished - 2011
Event30th International Conference on Ocean, Offshore and Arctic Engineering - Rotterdam, Netherlands
Duration: 19 Jun 201124 Jun 2011
Conference number: 30
https://www.asmeconferences.org/OMAE2011/

Conference

Conference30th International Conference on Ocean, Offshore and Arctic Engineering
Number30
CountryNetherlands
CityRotterdam
Period19/06/201124/06/2011
Internet address

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