IEC_61400-23_Ed.1.pdf

FORM CDV(IEC)2009-01-09 Registered trademark of the International Electrotechnical Commission 88/420/CDV COMMITTEE DRAFT FOR VOTE(CDV)PROJET DE COMIT POUR VOTE(CDV)Project number Numro de projet IEC 61400-23 Ed.1 IEC/TC or SC:CEI/CE ou SC:88 Secretariat/Secrtariat Netherlands Submitted for parallel voting in CENELEC Soumis au vote parallle au CENELEC Date of circulation Date de diffusion 2011-11-18 Closing date for voting(Voting mandatory for P-members)Date de clture du vote(Vote obligatoire pour les membres(P)2012-04-20 Also of interest to the following committees Intresse galement les comits suivants-Supersedes document Remplace le document 88/373/CD,88/406A/CC Proposed horizontal standard Norme horizontale suggre Other TC/SCs are requested to indicate their interest,if any,in this CDV to the TC/SC secretary Les autres CE/SC sont requis dindiquer leur intrt,si ncessaire,dans ce CDV lintention du secrtaire du CE/SC Functions concerned Fonctions concernes Safety Scurit EMC CEM Environment Environnement Quality assurance Assurance qualit CE DOCUMENT EST TOUJOURS LTUDE ET SUSCEPTIBLE DE MODIFICATION.IL NE PEUT SERVIR DE RFRENCE.LES RCIPIENDAIRES DU PRSENT DOCUMENT SONT INVITS PRSENTER,AVEC LEURS OBSERVATIONS,LA NOTIFICATION DES DROITS DE PROPRIT DONT ILS AURAIENT VENTUELLEMENT CONNAISSANCE ET FOURNIR UNE DOCUMENTATION EXPLICATIVE.THIS DOCUMENT IS STILL UNDER STUDY AND SUBJECT TO CHANGE.IT SHOULD NOT BE USED FOR REFERENCE PURPOSES.RECIPIENTS OF THIS DOCUMENT ARE INVITED TO SUBMIT,WITH THEIR COMMENTS,NOTIFICATION OF ANY RELEVANT PATENT RIGHTS OF WHICH THEY ARE AWARE AND TO PROVIDE SUPPORTING DOCUMENTATION.Title:IEC 61400-23 Ed.1:Wind turbines Part 23:Full-scale structural testing of rotor blades Introductory note The French National Committee has announced that it will provide a French version,but possibly at a later stage,and that an English only CDV should be circulated immediately.ATTENTION IEC CENELEC PARALLEL VOTING The attention of IEC National Committees,members of CENELEC,is drawn to the fact that this Committee Draft for Vote(CDV)for an International Standard is submitted for parallel voting.The CENELEC members are invited to vote through the CENELEC online voting system.Copyright 2011 International Electrotechnical Commission,IEC.All rights reserved.It is permitted to download this electronic file,to make a copy and to print out the content for the sole purpose of preparing National Committee positions.You may not copy or mirror the file or printed version of the document,or any part of it,for any other purpose without permission in writing from IEC.61400-23/CDV IEC(E):201X 2 CONTENTS 1 2 1 Scope.8 3 2 Normative references.8 4 3 Definitions.9 5 4 Notation.12 6 4.1 Symbols.12 7 4.2 Greek symbols.12 8 4.3 Subscripts.12 9 4.4 Coordinate Systems.14 10 5 General principles.15 11 5.1 Purpose of tests.15 12 5.2 Limit states.15 13 5.3 Practical constraints.15 14 5.4 Results of test.16 15 6 Documentation and procedures for test blade.16 16 7 Blade test program and test plans.17 17 7.1 Areas to be tested.17 18 7.2 Test Program.17 19 7.3 Test Plans.18 20 7.3.1 Blade description.18 21 7.3.2 Loads and conditions.18 22 7.3.3 Instrumentation.18 23 7.3.4 Expected test results.18 24 8 Load factors for testing.18 25 8.1 General.18 26 8.2 Partial safety factors used in the design.19 27 8.2.1 General.19 28 8.2.2 Partial factors on materials.19 29 8.2.3 Partial factors for consequences of failure.19 30 8.2.4 Partial factors on loads.19 31 8.3 Test load factors.19 32 8.3.1 Blade to blade variation.19 33 8.3.2 Possible errors in the fatigue formulation.20 34 8.3.3 Environmental conditions.20 35 8.4 Application of load factors to obtain the target load.20 36 9 Test loading and test load evaluation.21 37 9.1 General.21 38 9.2 Influence of load introduction.22 39 9.3 Static load testing.22 40 61400-23/CDV IEC(E):201X 3 9.4 Fatigue load testing.23 1 10 Test requirements.23 2 10.1 General.23 3 10.1.1 Test Records.23 4 10.1.2 Instrumentation calibration.24 5 10.1.3 Measurement uncertainties.24 6 10.1.4 Root fixture and test stand requirements.24 7 10.1.5 Environmental conditions monitoring.24 8 10.1.6 Deterministic corrections.25 9 10.2 Static test.25 10 10.2.1 Static load test.25 11 10.2.2 Strain measurement.25 12 10.2.3 Deflection Measurement.26 13 10.3 Fatigue test.26 14 10.4 Other Blade Property tests.26 15 10.4.1 Blade Mass and Center of Gravity.26 16 10.4.2 Natural frequencies.26 17 10.4.3 Optional blade property tests.27 18 11 Test Results evaluation.27 19 11.1 General.27 20 11.2 Catastrophic failure.27 21 11.3 Permanent deformation,loss of stiffness or change in other blade properties.27 22 11.4 Superficial damage.28 23 11.5 Failure evaluation.28 24 12 Reporting.28 25 12.1 General.28 26 12.2 Test Report Content.28 27 12.3 Evaluation of test in relation to design requirements.29 28 Annex A Guidelines for the necessity of renewed static and fatigue testing(Informative).30 29 Annex B Areas to be tested(Informative).32 30 Ann