TY - GEN

T1 - Bichromatic wave selection for validation of the difference-frequency transfer function for the OC6 validation campaign

AU - Tom, Nathan

AU - Robertson, Amy

AU - Jonkman, Jason

AU - Wendt, Fabian

AU - Böhm, Manuela

N1 - Funding Information: This work was authored by the National Renewable Energy Laboratory, operated by Alliance for Sustainable Energy, LLC, for the U. S. Department of Energy (DOE) under Contract No. DE-AC36-08GO28308. Funding provided by the U.S. Department of Energy Office of Energy Efficiency and Renewable Energy Wind Energy Technologies Office. The views expressed in the article do not necessarily represent the views of the DOE or the U.S. Government. The U.S. Government retains and the publisher, by accepting the article for publication, acknowledges that the U.S. Government retains a nonexclusive, paid-up, irrevocable, worldwide license to publish or reproduce the published form of this work, or allow others to do so, for U.S. Government purposes.

PY - 2019/12/13

Y1 - 2019/12/13

N2 - The focus of the Offshore Code Comparison Collaboration, Continuation, with Correlation and unCertainity (OC6) project, which operates under the International Energy Agency Wind Task 30, is to refine the accuracy of engineering tools used to design offshore wind turbines. In support of this work, a new validation campaign is being developed that seeks to better understand the nonlinear wave loading that excites floating wind systems at their low-frequency, rigid-body modes in surge and pitch. The validation data will be employed in a three-way validation between simplified engineering tools and higher-fidelity tools, such as computational fluid dynamics (CFD). Irregular wave spectrums, which are traditionally used to examine the nonlinear wave interaction with offshore structures, are too computationally expensive to be simulated in CFD tools, and so we will employ bichromatic wave cases instead. This paper reviews the process used to choose the bichromatic wave pairs to be applied in the campaign to validate the second-order difference-frequency quadratic and potential loads at the surge and pitch natural frequencies of a floating semisubmersible.

AB - The focus of the Offshore Code Comparison Collaboration, Continuation, with Correlation and unCertainity (OC6) project, which operates under the International Energy Agency Wind Task 30, is to refine the accuracy of engineering tools used to design offshore wind turbines. In support of this work, a new validation campaign is being developed that seeks to better understand the nonlinear wave loading that excites floating wind systems at their low-frequency, rigid-body modes in surge and pitch. The validation data will be employed in a three-way validation between simplified engineering tools and higher-fidelity tools, such as computational fluid dynamics (CFD). Irregular wave spectrums, which are traditionally used to examine the nonlinear wave interaction with offshore structures, are too computationally expensive to be simulated in CFD tools, and so we will employ bichromatic wave cases instead. This paper reviews the process used to choose the bichromatic wave pairs to be applied in the campaign to validate the second-order difference-frequency quadratic and potential loads at the surge and pitch natural frequencies of a floating semisubmersible.

KW - Bichromatic waves

KW - Nonlinear hydrodynamics

KW - Offshore wind

KW - Second-order difference-frequency

UR - http://www.scopus.com/inward/record.url?scp=85084164344&partnerID=8YFLogxK

U2 - 10.1115/IOWTC2019-7572

DO - 10.1115/IOWTC2019-7572

M3 - Conference contribution

AN - SCOPUS:85084164344

BT - Proceedings of the ASME 2019, 2nd International Offshore Wind Technical Conference, IOWTC2019

PB - American Society of Mechanical Engineers(ASME)

T2 - 2nd International Offshore Wind Technical Conference, IOWTC 2019

Y2 - 3 November 2019 through 6 November 2019

ER -