2.1 Nomenclature
2.1.1 Acronyms
2.1.1.1 BDB - Blade database
2.1.1.2 CM - Center of mass
2.1.1.3 CP - Power coefficient
2.1.1.4 DLC - Design Load Case
2.1.1.5 FEM - Finite element method
2.1.1.6 LAT - Lowest astronomical tide
2.1.1.7 MSL - Mean Sea Level
2.1.1.8 PID - Proportional-integral-derivative
2.1.1.9 RNA - Rotor-nacelle assembly
2.1.1.10 SSL - Standard sea-level conditions
2.1.1.11 SWL - Still water level
2.1.1.12 TM - Theory manual
2.1.1.13 UM - User manual
2.1.1.14 VSPR - Variable-speed pitch-regulated
2.1.1.15 WT - Wind turbine
2.1.2 Terminology
2.1.2.1 Aerodynamical reference point
2.1.2.2 Angle of attack
2.1.2.3 Aspect ratio
2.1.2.4 Blade aerodynamical station
2.1.2.5 Blade length
2.1.2.6 Blade reference line
2.1.2.7 Blade shape
2.1.2.8 Chord length
2.1.2.9 Chordline midpoint
2.1.2.10 Fields
2.1.2.11 In-plane
2.1.2.12 Influence length
2.1.2.13 Load case
2.1.2.14 Load case set
2.1.2.15 Out-of-plane
2.1.2.16 Pitch
2.1.2.17 Pitch axis
2.1.2.18 Scalar
2.1.2.19 Sensor
2.1.2.20 Time simulation job
2.1.2.21 Twist
2.1.2.21.1 Blade shape twist
2.1.2.21.2 Blade structure twist
2.1.2.21.3 Frame element twist
2.1.2.22 Wind angle
2.1.3 List of symbols
2.1.4 Abbreviations
2.2 Aerodynamics
2.2.1 Wind
2.2.1.1 Wind profile power law
2.2.1.2 Weibull distribution
2.2.1.3 Turbulence
2.2.1.4 IEC extreme events
2.2.1.5 Stepwise Wind
2.2.1.6 Linear wind
2.2.2 Aerodynamic loads
2.2.2.1 BEM algorithm
2.2.2.1.1 Steady BEM
2.2.2.1.2 Unsteady BEM
2.2.2.2 Aerodynamic Loads on Support section elements - Aero drag loads
2.2.2.3 Aerodynamic Loads on Nacelle and Hub
2.2.2.4 Viterna extrapolation
2.2.2.5 Tower shadow
2.2.2.6 Interpolation of aerodynamic coefficients
2.3 Oceanography
2.3.1 Water particle kinematics
2.3.1.1 Regular waves
2.3.1.2 Irregular waves
2.3.1.3 Stream function waves
2.3.1.4 Currents
2.3.2 Hydrodynamic loads
2.3.2.1 MacCamy-Fuchs
2.3.3 Wave spectrum input file
2.4 Structural modeling
2.4.1 Catenary lines
2.4.2 FEM code
2.4.2.1 Time domain simulation
2.4.2.1.1 Linear analysis
2.4.2.1.2 Damping
2.4.2.1.2.1 How to use Rayleigh damping
2.4.2.1.3 Stresses and responses
2.5 Geotechnical modeling
2.5.1 Linear springs
2.5.2 Damping - dashpots
2.5.3 Nonlinear springs
2.5.4 Hysteresis
2.6 Control theory
2.6.1 Variable speed generator
2.7 Fatigue analysis
2.7.1 Eurocode1993 S-N curves
2.8 Plugins
2.8.1 Xfoil