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EN 61400-3:2009
Superseded
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Wind turbines - Part 3: Design requirements for offshore wind turbines
04-02-2022
24-04-2009
INTRODUCTION
1 Scope
2 Normative references
3 Terms and definitions
4 Symbols and abbreviated terms
4.1 Symbols and units
4.2 Abbreviations
5 Principal elements
5.1 General
5.2 Design methods
5.3 Safety classes
5.4 Quality assurance
5.5 Rotor - nacelle assembly markings
6 External conditions
6.1 General
6.2 Wind turbine classes
6.3 Wind conditions
6.4 Marine conditions
6.5 Other environmental conditions
6.6 Electrical power network conditions
7 Structural design
7.1 General
7.2 Design methodology
7.3 Loads
7.4 Design situations and load cases
7.5 Load and load effect calculations
7.6 Ultimate limit state analysis
8 Control and protection system
9 Mechanical systems
10 Electrical system
11 Foundation design
12 Assessment of the external conditions at an offshore
wind turbine site
12.1 General
12.2 The metocean database
12.3 Assessment of wind conditions
12.4 Assessment of waves
12.5 Assessment of currents
12.6 Assessment of water level, tides and storm surges
12.7 Assessment of sea ice
12.8 Assessment of marine growth
12.9 Assessment of seabed movement and scour
12.10 Assessment of wake effects from neighbouring wind
turbines
12.11 Assessment of other environmental conditions
12.12 Assessment of earthquake conditions
12.13 Assessment of weather windows and weather downtime
12.14 Assessment of electrical network conditions
12.15 Assessment of soil conditions
13 Assembly, installation and erection
13.1 General
13.2 Planning
13.3 Installation conditions
13.4 Site access
13.5 Environmental conditions
13.6 Documentation
13.7 Receiving, handling and storage
13.8 Foundation/anchor systems
13.9 Assembly of offshore wind turbine
13.10 Erection of offshore wind turbine
13.11 Fasteners and attachments
13.12 Cranes, hoists and lifting equipment
14 Commissioning, operation and maintenance
14.1 General
14.2 Design requirements for safe operation, inspection
and maintenance
14.3 Instructions concerning commissioning
14.4 Operator's instruction manual
14.5 Maintenance manual
Annex A (informative) - Key design parameters for an offshore
wind turbine
Annex B (informative) - Wave spectrum formulations
Annex C (informative) - Shallow water hydrodynamics and breaking
waves
Annex D (informative) - Guidance on calculation of hydrodynamic
loads
Annex E (informative) - Recommendations for design of offshore
wind turbine support structures with respect to ice loads
Annex F (informative) - Offshore wind turbine foundation design
Annex G (informative) - Statistical extrapolation of operational
metocean parameters for ultimate strength analysis
Annex H (informative) - Corrosion protection
Bibliography
Annex ZA (normative) - Normative references to international
publications with their corresponding European
publications
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