EN IEC 61400-8:2024

SLOVENSKI STANDARD
01-oktober-2024
Sistemi za proizvodnjo energije na veter - 8. del: Projektiranje delov konstrukcije
vetrnih turbin (IEC 61400-8:2024)
Wind energy generation systems - Part 8: Design of wind turbine structural components
(IEC 61400-8:2024)
Windenergieanlagen – Teil 8: Design von Windenergieanlagen-Strukturkomponenten
(IEC 61400-8:2024)
Systèmes de génération d'énergie éolienne - Partie 8: Conception des composants
structurels des éoliennes (IEC 61400-8:2024)
Ta slovenski standard je istoveten z: EN IEC 61400-8:2024
ICS:
27.180 Vetrne elektrarne Wind turbine energy systems
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EUROPEAN STANDARD EN IEC 61400-8

NORME EUROPÉENNE
EUROPÄISCHE NORM August 2024
ICS 27.180
English Version
Wind energy generation systems - Part 8: Design of wind turbine
structural components
(IEC 61400-8:2024)
Systèmes de génération d'énergie éolienne - Partie 8: Windenergieanlagen - Teil 8: Design von
Conception des composants structurels des éoliennes Windenergieanlagen-Strukturkomponenten
(IEC 61400-8:2024) (IEC 61400-8:2024)
This European Standard was approved by CENELEC on 2024-08-07. CENELEC members are bound to comply with the CEN/CENELEC
Internal Regulations which stipulate the conditions for giving this European Standard the status of a national standard without any alteration.
Up-to-date lists and bibliographical references concerning such national standards may be obtained on application to the CEN-CENELEC
Management Centre or to any CENELEC member.
This European Standard exists in three official versions (English, French, German). A version in any other language made by translation
under the responsibility of a CENELEC member into its own language and notified to the CEN-CENELEC Management Centre has the
same status as the official versions.
CENELEC members are the national electrotechnical committees of Austria, Belgium, Bulgaria, Croatia, Cyprus, the Czech Republic,
Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, the
Netherlands, Norway, Poland, Portugal, Republic of North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland,
Türkiye and the United Kingdom.

European Committee for Electrotechnical Standardization
Comité Européen de Normalisation Electrotechnique
Europäisches Komitee für Elektrotechnische Normung
CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels
© 2024 CENELEC All rights of exploitation in any form and by any means reserved worldwide for CENELEC Members.
Ref. No. EN IEC 61400-8:2024 E

European foreword
The text of document 88/1010/FDIS, future edition 1 of IEC 61400-8, prepared by IEC/TC 88 "Wind
energy generation systems" was submitted to the IEC-CENELEC parallel vote and approved by
CENELEC as EN IEC 61400-8:2024.
The following dates are fixed:
• latest date by which the document has to be implemented at national (dop) 2025-05-07
level by publication of an identical national standard or by endorsement
• latest date by which the national standards conflicting with the (dow) 2027-08-07
document have to be withdrawn
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. CENELEC shall not be held responsible for identifying any or all such patent rights.
Any feedback and questions on this document should be directed to the users’ national committee. A
complete listing of these bodies can be found on the CENELEC website.
Endorsement notice
The text of the International Standard IEC 61400-8:2024 was approved by CENELEC as a European
Standard without any modification.
In the official version, for Bibliography, the following notes have to be added for the standard indicated:
ISO 12944-5:2019 NOTE Approved as EN ISO 12944-5:2019 (not modified)
ISO 1461:2022 NOTE Approved as EN ISO 1461:2022 (not modified)
ISO 14713-1:2017 NOTE Approved as EN ISO 14713-1:2017 (not modified)
Annex ZA
(normative)
Normative references to international publications
with their corresponding European publications
The following documents are referred to in the text in such a way that some or all of their content
constitutes requirements of this document. For dated references, only the edition cited applies. For
undated references, the latest edition of the referenced document (including any amendments)
applies.
NOTE 1 Where an International Publication has been modified by common modifications, indicated by (mod), the
relevant EN/HD applies.
NOTE 2 Up-to-date information on the latest versions of the European Standards listed in this annex is available
here: www.cencenelec.eu.
Publication Year Title EN/HD Year
IEC 61400-1 2019 Wind energy generation systems - Part 1: EN IEC 61400-1 2019
Design requirements
IEC 61400-3-1 2019 Wind energy generation systems - Part 3- EN IEC 61400-3-1 2019
1: Design requirements for fixed offshore
wind turbines
- -  + A11 2020
IEC/TS 61400-3-2 2019 Wind energy generation systems - Part 3- - -
2: Design requirements for floating offshore
wind turbines
IEC 61400-5 2020 Wind energy generation systems - Part 5: EN IEC 61400-5 2020
Wind turbine blades
IEC 61400-6 2020 Wind energy generation systems - Part 6: EN IEC 61400-6 2020
Tower and foundation design requirements
IEC 61400-13 2015 Wind turbines - Part 13: Measurement of EN 61400-13 2016
mechanical loads
ISO/IEC 17025 2017 General requirements for the competence EN ISO/IEC 17025 2017
of testing and calibration laboratories
ISO 148-1 2016 Metallic materials - Charpy pendulum EN ISO 148-1 2016
impact test - Part 1: Test method
ISO 945-1 2019 Microstructure of cast irons - Part 1: EN ISO 945-1 2019
Graphite classification by visual analysis
ISO 1083 2018 Spheroidal graphite cast irons - - -
Classification
ISO 1099 2017 Metallic materials - Fatigue testing - Axial - -
force-controlled method
ISO 1143 2021 Metallic materials - Rotating bar bending - -
fatigue testing
To be published. Stage at time of publication: FprEN IEC 61400-3-2:2024.
ISO 2394 2015 General principles on reliability for - -
structures
ISO 3800 1993 Threaded fasteners; axial load fatigue - -
testing; test methods and evaluation of
results
ISO 6892-1 2019 Metallic materials - Tensile testing - Part 1: EN ISO 6892-1 2019
Method of test at room temperature
ISO 7500-1 2018 Metallic materials - Calibration and EN ISO 7500-1 2018
verification of static uniaxial testing
machines - Part 1: Tension/compression
testing machines - Calibration and
verification of the force-measuring system
ISO 12107 2012 Metallic materials - Fatigue testing - - -
Statistical planning and analysis of data
ISO 12108 2018 Metallic materials - Fatigue testing - - -
Fatigue crack growth method
ISO 12135 2021 Metallic materials - Unified method of test - -
for the determination of quasistatic fracture
toughness
ISO/TR 14345 2012 Fatigue - Fatigue testing of welded - -
components - Guidance
ISO 16269-6 2014 Statistical interpretation of data - Part 6: - -
Determination of statistical tolerance
intervals
ASTM-E466-21 2021 Standard Practice for Conducting Force - -
Controlled Constant Amplitude Axial
Fatigue Tests of Metallic Materials
BS 7910 2013 Guide to methods for assessing the - -
acceptability of flaws in metallic structures
- - Personal fall protection equipment - Anchor CEN/TS 16415 2013
devices - Recommendations for anchor
devices for use by more than one person
simultaneously
- - Execution of steel structures and EN 1090-2 2018
aluminium structures - Part 2: Technical
requirements for steel structures
- - Execution of steel structures and EN 1090-3 2019
aluminium structures - Part 3: Technical
requirements for aluminium structures
- - Founding - Magnetic particle testing EN 1369 2012
- - Founding - Magnetic particle inspection EN 1369 1996
- - Founding - Liquid penetrant testing - Part EN 1371-1 2011
1: Sand, gravity die and low pressure die
castings
- - Founding - Liquid penetrant inspection - EN 1371-1 1997
Part 1: Sand, gravity die and low pressure
die castings
- - Eurocode 3: Design of steel structures - EN 1993-1-8 2007
Part 1-8: Design of joints
- - Eurocode 3: Design of steel structures - EN 1993-1-9 2007
Part 1-9: Fatigue
- - Eurocode 3: Design of steel structures - EN 1993-1-10 2007
Part 1-10: Material toughness and through-
thickness properties
- - Eurocode 9: Design of aluminium EN 1991-1-1 2008
structures - Part 1-1: General structural
rule
- - Eurocode 9: Design of aluminium EN 1999-1-3 2007
structures - Part 1-3: Structures
susceptible to fatigue
- - Ultrasonic examination - Part 3: Spheroidal EN 12680-3 2011
graphite cast iron castings
- - Wind turbines - Protective measures - EN 50308 2004
Requirements for design, operation
and maintenance
DIN 50100 2016 Load controlled fatigue testing - Execution - -
and evaluation of cyclic tests at constant
load amplitudes on metallic specimens and
components
FKM Guideline 2018 Fracture Mechanics Proof of Strength for - -
Engineering Components (FKM – RBM-04-
18)
IIW-Doc. 2259- 2014 Recommendations for fatigue design of - -
152259-15 welded joints and components,
International Institute of Welding
IIW-Doc. XIII- 2010 Guideline for the Fatigue Assessment by - -
2240r2-08/XV- Notch Stress Analysis for Welded
1289r2-08 Structures
VDI 2230-1 2015 Systematic calculation of highly stressed - -
bolted joints - Joints with one cylindrical
bolt
VDI 2230-2 2014 Systematic calculation of high duty bolted - -
joints - Joints with several cylindrical bolts
VDMA 23902 2014 Guideline for fracture mechanical strength - -
assessment of planet carriers made of
nodular cast iron EN-GJS-700-2 for wind
turbine gear boxes, Verband Deutscher
Maschinen- und Anlagenbau e.V.

IEC 61400-8 ®
Edition 1.0 2024-07
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Wind energy generation systems –

Part 8: Design of wind turbine structural components

Systèmes de génération d'énergie éolienne –

Partie 8: Conception des composants structurels des éoliennes

INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
INTERNATIONALE
ICS 27.180  ISBN 978-2-8322-9063-7

– 2 – IEC 61400-8:2024  IEC 2024
CONTENTS
FOREWORD . 5
INTRODUCTION . 7
1 Scope . 8
2 Normative references . 8
3 Terms, definitions, symbols and abbreviated terms . 10
3.1 Terms and definitions . 10
3.2 Symbols and abbreviated terms . 12
4 Reliability considerations . 14
4.1 Approaches to reliability based design . 14
4.2 Models and basic variables for structural verification . 16
4.2.1 Reliability assessment . 16
4.2.2 Material properties . 16
4.3 Partial safety factors and reliability targets . 16
5 Application of loads and analysis models . 17
5.1 Loads models . 17
5.2 Analysis model . 17
5.2.1 General . 17
5.2.2 Load path modelling . 17
5.2.3 Application of load components . 17
5.2.4 Boundary conditions . 18
5.3 Modelling of nonlinear mechanical behaviour . 18
5.3.1 General . 18
5.3.2 Nonlinear stress effects . 18
5.3.3 Application of ultimate loads . 18
5.3.4 Application of fatigue loads . 18
5.4 Partial safety factors .
...