I have some trouble with making steady-state analysis.
I don’t know how to make steady-state analysis and get the curves of rotor power vs wind speed, as shown below:
To this problem, I have seen the discussion in the following forum post: viewtopic.php?f=4&t=666, in which Mr Jonkman said “we generated the results of Figure 9-1 by running a series of FAST with AeroDyn simulations at a number of given, steady, and uniform wind speeds. Separate simulations were run at each wind speed and each simulation was run long enough to ensure that all transient behavior had died out.” Is this mean we should make a time-marchiing simulation (AnalMode=1)? If so, I set：
TMax=630s, PCMode=1, RotSpeed=12.1, WaveMod=0(still water)，RdtnTMax=0
NREL 5.0 MW offshore baseline aerodynamic input properties; Compatible with AeroDyn v12.58.
SI SysUnits - System of units for used for input and output [must be SI for FAST] (unquoted string)
STEADY StallMod - Dynamic stall included [BEDDOES or STEADY] (unquoted string)
USE_CM UseCm - Use aerodynamic pitching moment model? [USE_CM or NO_CM] (unquoted string)
EQUIL InfModel - Inflow model [DYNIN or EQUIL] (unquoted string)
SWIRL IndModel - Induction-factor model [NONE or WAKE or SWIRL] (unquoted string)
0.005 AToler - Induction-factor tolerance (convergence criteria) (-)
PRANDtl TLModel - Tip-loss model (EQUIL only) [PRANDtl, GTECH, or NONE] (unquoted string)
PRANDtl HLModel - Hub-loss model (EQUIL only) [PRANdtl or NONE] (unquoted string)
and the .wnd is
! Time Wind Wind Vertical Horiz. Pwr.Law Lin.Vert. Gust
! Speed Dir Speed Shear Vert.Shr Shear Speed
!(sec) (m/s) (deg) (m/s) (m/s)
0.0 24 0.000 0.000 0.000 0.000 0.000 0.000
But the responses are shaking. In other words, the transient behavior is also exist, as shown below:
So I can’t determin the steady-state value, what do you think? Wheather my parameters setting above is right?