[44]Reliability-based design of wind turbine blades.pdf

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1、StructuralSafetyxxx(2011)xxx–xxxContentslistsavailableatScienceDirectStructuralSafetyjournalhomepage:www.elsevier.com/locate/strusafeReliability-baseddesignofwindturbinebladesa,⇑a,bHenrikStensgaardToft,JohnDalsgaardSørensenaDepartmentofCivilEngineering,AalborgUniversity,Sohngaa

2、rdsholmsvej57,9000Aalborg,DenmarkbWindEnergyDivision,RisøNationalLaboratoryforSustainableEnergy,DTU,DenmarkarticleinfoabstractArticlehistory:Reliability-baseddesignofwindturbinebladesrequiresidentificationoftheimportantfailuremodes/Received22June2010limitstatesalongwithstochasti

3、cmodelsfortheuncertaintiesandmethodsforestimatingthereliability.Accepted18May2011Inthepresentpaperitisdescribedhowreliability-baseddesigncanbeappliedtowindturbineblades.AvailableonlinexxxxForwindturbineblades,testswiththebasiccompositematerialsandafewfull-scalebladesarenor-mall

4、yperformedduringthedesignprocess.Byadoptingareliability-baseddesignapproach,informationKeywords:fromthesetestscanbetakenintoaccountinarationalwayduringthedesignprocess.InthepresentWindturbinepaper,aprobabilisticframeworkfordesignofwindturbinebladesarepresentedanditisdemonstrate

5、dBladehowinformationfromtestscanbetakenintoaccountusingtheMaximum-LikelihoodmethodandBayes-ReliabilityStochasticmodelsianstatistics.UncertaintiesInanumericalexample,thereliabilityisestimatedforawindturbinebladeinbothultimateandfati-Partialsafetyfactorsguelimitstates.Information

6、fromtestsisusedtoformulatethestochasticmodelsusedinthelimitstateequations.Partialsafetyfactorsforuseintraditionaldeterministicdesignareestimatedusingthesto-chasticmodels.Ó2011ElsevierLtd.Allrightsreserved.1.IntroductionWindturbinebladesaretypicallymadeofcompositematerialssuchas

7、GlassFibreReinforcedPolymer(GFRP).InthemainsparDuringthelastthreedecades,windturbinesforelectricitypro-websandwichmaterialsareoftenused.Thematerialpropertiesductionhaveincreasedsignificantlybothinproductioncapacityofthecompositematerialaredependentone.g.theconstituentandinsize.T

8、oday,windturbineswitharatedpoweron5MWmaterialpropertie