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journalArticle
Velarde
Joey
Vanem
Erik
Kramhøft
Claus
Sørensen
John Dalsgaard
Dynamic response
Environmental contour method
Marine structures
Offshore wind turbines
Probabilistic design
Reliability analysis
Probabilistic analysis of offshore wind turbines under extreme resonant response: Application of environmental contour method
Offshore wind turbines can exhibit dynamic resonant behavior due to sea states with wave excitation frequencies coinciding with the structural eigenfrequencies. In addition to significant contributions to fatigue actions, dynamic load amplification can govern extreme wind turbine responses. However, current design requirements lack specifications for assessment of resonant loads, particularly during parked or idling conditions where aerodynamic damping contributions are significantly reduced. This study demonstrates a probabilistic approach for assessment of offshore wind turbines under extreme resonant responses during parked situations. Based on in-situ metocean observations on the North Sea, the environmental contour method is used to establish relevant design conditions. A case study on a feasible large monopile design showed that resonant loads can govern the design loads. The presented framework can be applied to assess the reliability of wave-sensitive offshore wind turbine structures for a given site-specific metocean conditions and support structure design.
101947
December 1, 2019
en
Probabilistic analysis of offshore wind turbines under extreme resonant response
http://www.sciencedirect.com/science/article/pii/S0141118719304328
2019-10-24 07:08:33
ScienceDirect
Applied Ocean Research
93
Applied Ocean Research
DOI 10.1016/j.apor.2019.101947
ISSN 0141-1187