Dear Emily,
I haven’t reviewed your files, but I’ve attached the tower input file from our FAST v7 model of the NREL 5-MW baseline wind turbine atop the OC3-monopile with coupled springs (CS) foundation. I’m not sure why the forum won’t allow me to attach the associated platform input file, but I’ve pasted this below:
NRELOffshrBsline5MW_Tower_Monopile_CS.dat.txt (4.32 KB)
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---------------------- FAST PLATFORM FILE --------------------------------------
NREL 5.0 MW offshore baseline monopile platform with discrete coupled springs foundation input properties.
---------------------- FEATURE FLAGS (CONT) ------------------------------------
True PtfmSgDOF - Platform horizontal surge translation DOF (flag)
True PtfmSwDOF - Platform horizontal sway translation DOF (flag)
False PtfmHvDOF - Platform vertical heave translation DOF (flag)
True PtfmRDOF - Platform roll tilt rotation DOF (flag)
True PtfmPDOF - Platform pitch tilt rotation DOF (flag)
False !JASON:True !JASON:False PtfmYDOF - Platform yaw rotation DOF (flag)
---------------------- INITIAL CONDITIONS (CONT) -------------------------------
0.0 PtfmSurge - Initial or fixed horizontal surge translational displacement of platform (meters)
0.0 PtfmSway - Initial or fixed horizontal sway translational displacement of platform (meters)
0.0 PtfmHeave - Initial or fixed vertical heave translational displacement of platform (meters)
0.0 PtfmRoll - Initial or fixed roll tilt rotational displacement of platform (degrees)
0.0 PtfmPitch - Initial or fixed pitch tilt rotational displacement of platform (degrees)
0.0 PtfmYaw - Initial or fixed yaw rotational displacement of platform (degrees)
---------------------- TURBINE CONFIGURATION (CONT) ----------------------------
20.0 TwrDraft - Downward distance from the ground level [onshore] or MSL [offshore] to the tower base platform connection (meters)
20.0 PtfmCM - Downward distance from the ground level [onshore] or MSL [offshore] to the platform CM (meters)
20.0 PtfmRef - Downward distance from the ground level [onshore] or MSL [offshore] to the platform reference point (meters)
---------------------- MASS AND INERTIA (CONT) ---------------------------------
0.0 PtfmMass - Platform mass (kg)
0.0 PtfmRIner - Platform inertia for roll tilt rotation about the platform CM (kg m^2)
0.0 PtfmPIner - Platform inertia for pitch tilt rotation about the platform CM (kg m^2)
0.0 PtfmYIner - Platfrom inertia for yaw rotation about the platform CM (kg m^2)
---------------------- PLATFORM (CONT) -----------------------------------------
1 PtfmLdMod - Platform loading model {0: none, 1: user-defined from routine UserPtfmLd} (switch)
---------------------- TOWER (CONT) --------------------------------------------
1 TwrLdMod - Tower loading model {0: none, 1: Morison's equation, 2: user-defined from routine UserTwrLd} (switch)
6.0 TwrDiam - Tower diameter in Morison's equation (meters) [used only when TwrLdMod=1]
1.0 TwrCA - Normalized hydrodynamic added mass coefficient in Morison's equation (-) [used only when TwrLdMod=1] [determines TwrCM=1+TwrCA]
1.0 TwrCD - Normalized hydrodynamic viscous drag coefficient in Morison's equation (-) [used only when TwrLdMod=1]
---------------------- WAVES ---------------------------------------------------
1027.0 WtrDens - Water density (kg/m^3)
20.0 WtrDpth - Water depth (meters)
2 WaveMod - Incident wave kinematics model {0: none=still water, 1: plane progressive (regular) with optional phase specification (i.e., specify 1P#, where # is the phase in degrees to override WaveSeed), 2: JONSWAP/Pierson-Moskowitz spectrum (irregular), 3: user-defind spectrum from routine UserWaveSpctrm (irregular)} (switch)
3 WaveStMod - Model for stretching incident wave kinematics to instantaneous free surface {0: none=no stretching, 1: vertical stretching, 2: extrapolation stretching, 3: Wheeler stretching} (switch) [unused when WaveMod=0]
3630.0 WaveTMax - Analysis time for incident wave calculations (sec) [unused when WaveMod=0] [determines WaveDOmega=2Pi/WaveTMax in the IFFT]
0.25 WaveDT - Time step for incident wave calculations (sec) [unused when WaveMod=0] [0.1<=WaveDT<=1.0 recommended] [determines WaveOmegaMax=Pi/WaveDT in the IFFT]
5.0 WaveHs - Significant wave height of incident waves (meters) [unused when WaveMod=0, 3, or 4]
12.4 WaveTp - Peak spectral period of incident waves (sec) [unused when WaveMod=0, 3, or 4]
DEFAULT WavePkShp - Peak shape parameter of incident wave spectrum (-) or DEFAULT (unquoted string) [used only when WaveMod=2] [use 1.0 for Pierson-Moskowitz]
0.0 WaveDir - Incident wave propagation heading direction (degrees) [unused when WaveMod=0 or 4]
123456789 WaveSeed(1) - First random seed of incident waves [-2147483648 to 2147483647] (-) [unused when WaveMod=0, 1P#, or 4]
1011121314 WaveSeed(2) - Second random seed of incident waves [-2147483648 to 2147483647] (-) [unused when WaveMod=0, 1P#, or 4]
True WaveNDAmp - Normally-distributed amplitudes in incident waves spectrum (flag) [used only when WaveMod=2 or 3]
"Dummy" GHWvFile - Root name of GH Bladed files containing wave data (quoted string) [used only when WaveMod=4]
---------------------- CURRENT -------------------------------------------------
0 CurrMod - Current profile model {0: none=no current, 1: standard, 2: user-defined from routine UserCurrent} (switch)
0.0 CurrSSV0 - Sub-surface current velocity at still water level (m/s) [used only when CurrMod=1]
DEFAULT CurrSSDir - Sub-surface current heading direction (degrees) or DEFAULT (unquoted string) [used only when CurrMod=1]
20.0 CurrNSRef - Near-surface current reference depth (meters) [used only when CurrMod=1]
0.0 CurrNSV0 - Near-surface current velocity at still water level (m/s) [used only when CurrMod=1]
0.0 CurrNSDir - Near-surface current heading direction (degrees) [used only when CurrMod=1]
0.0 CurrDIV - Depth-independent current velocity (m/s) [used only when CurrMod=1]
0.0 CurrDIDir - Depth-independent current heading direction (degrees) [used only when CurrMod=1]
---------------------- OUTPUT (CONT) -------------------------------------------
0 NWaveKin - Number of points where the wave kinematics can be output [0 to 9] (-)
0 WaveKinNd - List of tower nodes that have wave kinematics sensors [1 to TwrNodes] (-) [unused if NWaveKin=0]
The user-platform load routine (UserPtfmLd) for this model is available in the following forum topic: Turbine-soil interaction. Influence on the mode shapes. - #13 by Jason.Jonkman.
I hope that helps.
Best regards,