Publications

Skip Navigation Links.
Recently Published
Collapse per documenttypeper documenttype
Collapse ECN publicationECN publication
2018
2017
2016
2015
2014
2013
2012
2011
2010
2009
2008
2007
2006
2005
2004
2003
2002
2001
2000
1999
1998
1997
1996
1995
1994
1993
1992
1991
1990
1989
1988
1987
1986
1985
1984
1983
1982
1981
1980
1979
1977
Expand BookBook
Expand ArticleArticle
Expand Article (scientific)Article (scientific)
Expand Conference PaperConference Paper
Expand PresentationPresentation
Expand OtherOther
Expand External memoExternal memo
Expand LeafletLeaflet
Expand per Unitper Unit
Expand per Clusterper Cluster

Search for publications:


Limit search to the fields

ECN publication
Title:
Ontwikkeling en validatie van een stochastisch windbelastingsmodel. Deel 3. Validatie
 
Author(s):
Winkelaar, D.; Hendriks, H.B.
 
Published by: Publication date:
ECN 1-12-1997
 
ECN report number: Document type:
ECN-C--96-098 ECN publication
 
Number of pages: Full text:
91 Download PDF  

Abstract:
The validation of a model of normal wind conditions for wind turbinedesign fatigue load calculations is described. The model is proposed in volume 1 of this report, based on stochastic wind field simulation, complies with the IEC 1400-1 standard and should be accepted by the Dutch Design Code as an alternative for the gust model of the Dutch Handbook Wind Data for Wind Turbine Design, Version 3. To validate the wind load model fatigue life time load spectra of the blade root bending moments are calculated for three turbines ranging from 150 kW to 1 MW. These load spectra are compared with measured load spectra and calculated load spectra based on the Dutch Handbook. Additional comparisons are made with Handbook load spectra of five other bending moments, viz. the blade bending moments at mid span, the tilting moment at the top and the base of the tower and the tower torsion moment. It is concluded that the wind load model based on the IEC 1400-1 standard is capable of producing reliable design load spectra which compare well with measurements and Handbook calculations if: (1) at least the two horizontal velocity components of the turbulent wind field are simulated; (2) the von Karman turbulence model is used; (3) the exponential coherence function proposed in Annex B of the IEC 1400-1 standard is used for the longitudinal component; and (4) the exponential coherence function proposed by the 'Engineering Science Data Unit' (ESDU) is used for the transversal component. Furthermore, it is highly recommended to base the load spectra on at least six realisations and to include the spatial wind speed variations in longitudinal direction when the turbine is yawed. 41 figs., 18 tabs., 20 refs.


Back to List