Header menu link for other important links
X
Nonlinear short term extreme response of spar type floating offshore wind turbines
Neeraj Aggarwal, R. Manikandan,
Published in Elsevier Ltd
2017
Volume: 130
   
Pages: 199 - 209
Abstract
In this work, the dynamic characteristics of spar based floating 5 MW offshore wind turbine (OWT) are studied under operational and survival conditions for offshore Indian conditions. The spar with OWT is installed in 320 m water depth. The OWT is subjected to combined wind and wave loads according to irregular Pierson-Moskowitz spectrum. After obtaining nonlinear spar platform responses, 3-h short term extreme motions are calculated which are useful for the design of an OWT. Extreme values provide realistic estimates to the associated risk of an event since the tail region governs the largest/smallest events or even the events over a threshold in a sample. In this paper, the extreme values are obtained by fitting the peaks in the tail regime using a Weibull-distribution. While one obtains Gaussian responses under the survival loads, the operational conditions have non-Gaussian responses and also larger than survival ones. The results show one should exercise caution for generating the extreme values for non-Gaussian responses and do a proper sensitivity analysis with respect to samples used for generation of extremes. © 2016 Elsevier Ltd
About the journal
JournalData powered by TypesetOcean Engineering
PublisherData powered by TypesetElsevier Ltd
ISSN00298018
Open AccessNo
Concepts (21)
  •  related image
    Gaussian distribution
  •  related image
    Gaussian noise (electronic)
  •  related image
    OFFSHORE OIL WELLS
  •  related image
    Sensitivity analysis
  •  related image
    SPAR PLATFORMS
  •  related image
    Weibull distribution
  •  related image
    Wind turbines
  •  related image
    Dynamic characteristics
  •  related image
    EXTREME RESPONSE
  •  related image
    FLOATING OFFSHORE WIND TURBINES
  •  related image
    NON-GAUSSIAN RESPONSE
  •  related image
    Operational conditions
  •  related image
    PIERSON-MOSKOWITZ SPECTRUM
  •  related image
    SURVIVAL CONDITIONS
  •  related image
    WAVE LOADINGS
  •  related image
    OFFSHORE WIND TURBINES
  •  related image
    Offshore structure
  •  related image
    WAVE FIELD
  •  related image
    WIND FIELD
  •  related image
    Wind turbine
  •  related image
    India