IEC_61400-23_Ts_Full-Scale_Structural_Testing_Of_Rotor_Blades_2001.pdf

TECHNICALSPECIFICATIONIEC TS 61400-23First edition2001-04Wind turbine generator systems Part 23:Full-scale structural testing of rotor bladesArognrateurs Partie 23:Essais en vraie grandeur des structures des palesReference numberIEC/TS 61400-23:2001(E)Publication numberingAs from 1 January 1997 all IEC publications are issued with a designation in the60000 series.For example,IEC 34-1 is now referred to as IEC 60034-1.Consolidated editionsThe IEC is now publishing consolidated versions of its publications.For example,edition numbers 1.0,1.1 and 1.2 refer,respectively,to the base publication,thebase publication incorporating amendment 1 and the base publication incorporatingamendments 1 and 2.Further information on IEC publicationsThe technical content of IEC publications is kept under constant review by the IEC,thus ensuring that the content reflects current technology.Information relating tothis publication,including its validity,is available in the IEC Catalogue ofpublications(see below)in addition to new editions,amendments and corrigenda.Information on the subjects under consideration and work in progress undertakenby the technical committee which has prepared this publication,as well as the listof publications issued,is also available from the following:IEC Web Site(www.iec.ch)Catalogue of IEC publicationsThe on-line catalogue on the IEC web site(www.iec.ch/catlg-e.htm)enablesyou to search by a variety of criteria including text searches,technicalcommittees and date of publication.On-line information is also available onrecently issued publications,withdrawn and replaced publications,as well ascorrigenda.IEC Just PublishedThis summary of recently issued publications(www.iec.ch/JP.htm)is alsoavailable by email.Please contact the Customer Service Centre(see below)forfurther information.Customer Service CentreIf you have any questions regarding this publication or need further assistance,please contact the Customer Service Centre:Email:custserviec.chTel:+41 22 919 02 11Fax:+41 22 919 03 00TECHNICALSPECIFICATIONIECTS 61400-23First edition2001-04Wind turbine generator systems Part 23:Full-scale structural testing of rotor bladesArognrateurs Partie 23:Essais en vraie grandeur des structures des palesPRICE CODE IEC 2001 Copyright-all rights reservedNo part of this publication may be reproduced or utilized in any form or by any means,electronic ormechanical,including photocopying and microfilm,without permission in writing from the publisher.International Electrotechnical Commission3,rue de Varemb Geneva,SwitzerlandTelefax:+41 22 919 0300e-mail:inmailiec.ch IEC web site http:/www.iec.chXBFor price,see current catalogue Commission Electrotechnique Internationale International Electrotechnical Commission 2 TS 61400-23 IEC:2001(E)CONTENTSFOREWORD.4INTRODUCTION.61Scope.72Normative references.73Definitions.84Notation.114.1Symbols.114.2Greek symbols.114.3Subscripts.114.4Abbreviations.125General principles.125.1Purpose of tests.125.2Limit states.125.3Practical constraints.135.4Results of test.136Blade data.146.1General.146.2External dimensions and interfaces.146.3Blade characteristics.156.4Material data.166.5Design loads and conditions.166.6Areas to be tested.186.7Special blade modifications.186.8Root fixing.186.9Mechanisms.187Differences between design and test load conditions.187.1General.187.2Load introduction.197.3Bending moments and shear.197.4Flatwise and edgewise combinations.207.5Radial loads.207.6Torsion loads.207.7Mechanisms.207.8Environmental conditions.207.9Load spectrum and sequence.218Test loading.218.1General.218.2Load-based testing.218.3Strength-based testing.228.4Static-test load aspects.238.5Fatigue-test load aspects.248.6Sequence of static and fatigue tests.258.7Mechanisms.26TS 61400-23 IEC:2001(E)3 9Load factors for testing.269.1General.269.2Partial safety factors used in the design.269.3Test load factors.279.4Application of load factors to obtain the target load.2810Evaluation of test load distribution in relation to design requirements.2910.1General.2910.2Influence of load introduction.2910.3Static tests.2910.4Fatigue tests.3311Failure modes.3611.1General.3611.2Catastrophic failure.3711.3Functional failure.3711.4Superficial failure.3712Test procedures and methods.3812.1General.3812.2Test stand and root fixture requirements.3812.3Load introduction fixtures.3812.4Static strength test.3912.5Fatigue testing.4012.6Advantages and disadvantages of test alternatives.4312.7Deterministic corrections.4312.8Data collection.4413Other tests determining blade properties.4613.1General.4613.2Test stand deflections.4613.3Deflection.4613.4Stiffness distribution.4613.5Strain distribution measurements.4713.6Natural frequencies.4813.7Damping.4813.8Mode shapes.4813.9Mass distribution.4813.10 Creep.4813.11 Other non-destructive testing.4813.12 Blade sectioning.4914Reporting.4914.1General.4914.2Content.49Annex A(normative)Partial safety factors considerations.51Annex B(normative)Sensitivity of the evaluation to fatigue f