GB/T 31517.1-2022Fixed offshore wind turbines - Design requirements (English PDF)

National Standard of the People's Republic of China

ICS

27.180

Classification

F 11

Replacing

GB/T 31517-2015

Issued by: State Administration for Market Regulation, China National Standardization Administration

Contents

• Preface
• Introduction
• 1 Scope
• 2 Normative references
• 3 Terms and Definitions
• 4 Symbols and abbreviations
• 4.1 Symbols and units
• 4.2 Abbreviations
• 5 Basic Requirements
• 5.1 Overview
• 5.2 Design method
• 5.3 Security Level
• 5.4 Quality Assurance
• 5.5 Wind rotor-nacelle assembly nameplate
• 6 Definition and evaluation of external conditions
• 6.1 Overview
• 6.2 Wind turbine class
• 6.3 Definition of external conditions of offshore wind turbine site
• 6.3.1 Overview
• 6.3.2 Wind conditions
• 6.3.3 Sea conditions
• 6.3.4 Grid conditions
• 6.3.5 Other environmental conditions
• 6.4 Assessment of External Conditions of Offshore Wind Turbine Sites
• 6.4.1 Overview
• 6.4.2 Marine Meteorological Database
• 6.4.3 Wind assessment
• 6.4.4 Ocean condition assessment
• 6.4.5 Assessment of other environmental conditions
• 6.4.6 Grid condition assessment
• 6.4.7 Evaluation of geological conditions
• 7 Structural Design
• 7.1 Overview
• 7.2 Design method
• 7.3 Loads
• 7.3.1 Overview
• 7.3.2 Gravity and inertial loads
• 7.3.3 Aerodynamic loads
• 7.3.4 Driving load
• 7.3.5 Hydrodynamic loads
• 7.3.6 Sea ice/lake ice loading
• 7.3.7 Other loads
• 7.4 Design state and load cases
• 7.4.1 Overview
• 7.4.2 Power generation (DLC1.1~DLC1.6)
• 7.4.3 Both power generation failure or loss of grid connection (DLC2.1~DLC2.5)
• 7.4.4 Startup (DLC3.1~DLC3.3)
• 7.4.5 Normal shutdown (DLC4.1~DLC4.2)
• 7.4.6 Emergency stop (DLC5.1)
• 7.4.7 Stop (stop or idle) (DLC6.1~DLC6.4)
• 7.4.8 Shutdown with faults (DLC7.1~DLC7.2)
• 7.4.9 Transportation, installation, maintenance and repair (DLC8.1~DLC8.4)
• 7.4.10 Sea ice/lake ice design load case
• 7.5 Calculation of loads and load effects
• 7.5.1 Overview
• 7.5.2 Correlation of hydrodynamic loads
• 7.5.3 Calculation of hydrodynamic loads
• 7.5.4 Sea ice/lake ice load calculation
• 7.5.5 Global damping evaluation for response evaluation of supporting structures
• 7.5.6 Simulation requirements
• 7.5.7 Other requirements
• 7.6 Limit state analysis
• 7.6.1 Method
• 7.6.2 Ultimate strength analysis
• 7.6.3 Fatigue failure
• 7.6.4 Special partial safety factors
• 7.6.5 Periodic load assessment for foundation assessment
• 8 Control system
• 9 Mechanical systems
• 10 Electrical system
• 11 Foundation and Substructure Design
• 12 Assembly, installation and hoisting
• 12.1 Overview
• 12.2 Program
• 12.3 Installation conditions
• 12.4 Site roads
• 12.5 Environmental conditions
• 12.6 Documentation
• 12.7 Receiving, handling and storage
• 12.8 Supporting structural systems
• 12.9 Offshore wind turbine assembly
• 12.10 Offshore wind turbine hoisting
• 12.11 Fasteners and accessories
• 12.12 Cranes, hoists and lifting equipment
• 13 Commissioning, operation and maintenance
• 13.1 Overview
• 13.2 Design requirements for safe operation, inspection and maintenance
• 13.3 Commissioning Manual