Running error while modify the Stc.dat #3204

Mclq666 · 2026-02-15T05:29:29Z

Mclq666
Feb 15, 2026

In the 5MW_Land_DLL_WTurb,I added some inputs of an air spring with Vampiremodule in the NRELOffshrBsline5MW_ServoDyn_StC.dat and put it into the NRELOffshrBsline5MW_Onshore_ServoDyn.dat.the OpenFAST can not find the Variable "UseVampireModel" but the Stc.dat shows that it's in line 92

Answered by jjonkman

Feb 17, 2026

Dear @Mclq666,

Can you share the Echo file associated with your SevroDyn_Stc.dat input file?

By the way: I see you added your Vampire-related inputs to the TLCD option (StC_DOF_MODE = 3), but that you have selected StC_DOF_MODE = 1; perhaps this is pointing to the problem?

Best regards,

View full answer

jjonkman · 2026-02-16T16:35:39Z

jjonkman
Feb 16, 2026
Collaborator

Dear @Mclq666,

I assume your question is a follow-up to the following discussion: #3180.

Regarding your error, do you get an insight on what is happening with the input file processing of your updated StC input file when enabling Echo = TRUE, or when stepping through with the debugger?

Best regards,

0 replies

Mclq666 · 2026-02-17T02:49:44Z

Mclq666
Feb 17, 2026
Author

Dear @jjonkman,
Here is the ech file while running the simulation with updated Stc file


This file of echoed input was generated by OpenFAST on 08-Feb-2026 at 11:43:34.

Data from OpenFAST primary input file "5MW_Land_DLL_WTurb.fst":

------- OpenFAST EXAMPLE INPUT FILE -------------------------------------------
               FTitle         - File Header: File Description (line 2)
  "FAST Certification Test #18: NREL 5.0 MW Baseline Wind Turbine (Onshore)"
---------------------- SIMULATION CONTROL --------------------------------------
            T  Echo           - Echo input data to <RootName>.ech (flag)
               AbortLevel     - Error level when simulation should abort (string)
  "FATAL"
   6.0000E+01  TMax           - Total run time (s)
   6.2500E-03  DT             - Recommended module time step (s)
            2  InterpOrder    - Interpolation order for inputs and outputs {0=nearest neighbor ,1=linear, 2=quadratic} (-)
            0  NumCrctn       - Number of corrections{0=explicit calculation, i.e., no corrections} (-)
   9.9999E+04  DT_UJac        - Time between calls to get Jacobians (s)
   1.0000E+06  UJacSclFact    - Scaling factor used in Jacobians (-)
---------------------- FEATURE SWITCHES AND FLAGS ------------------------------
            1  CompElast      - Compute structural dynamics (switch) {1=ElastoDyn; 2=ElastoDyn + BeamDyn for blades; 3=Simplified-ElastoDyn}
            1  CompInflow     - inflow wind velocities (switch) {0=still air; 1=InflowWind}
            2  CompAero       - Compute aerodynamic loads (switch) {0=None; 1=AeroDisk; 2=AeroDyn; 3=ExtLoads}
            1  CompServo      - Compute control and electrical-drive dynamics (switch) {0=None; 1=ServoDyn}
            0  CompSeaSt      - Compute sea state information (switch) {0=None; 1=SeaState}}
            0  CompHydro      - Compute hydrodynamic loads (switch) {0=None; 1=HydroDyn}
            0  CompSub        - Compute sub-structural dynamics (switch) {0=None; 1=SubDyn}
            0  CompMooring    - Compute mooring system (switch) {0=None; 1=MAP; 2=FEAMooring; 3=MoorDyn; 4=OrcaFlex}
            0  CompIce        - Compute ice loads (switch) {0=None; 1=IceFloe}
            0  MHK            - MHK turbine type (switch) {0=Not an MHK turbine; 1=Fixed MHK turbine; 2=Floating MHK turbine}
---------------------- ENVIRONMENTAL CONDITIONS --------------------------------
   9.8066E+00  Gravity        - Gravitational acceleration (m/s^2)
   1.2250E+00  AirDens        - Air density (kg/m^3)
   0.0000E+00  WtrDens        - Water density (kg/m^3)
   1.4640E-05  KinVisc        - Kinematic viscosity of working fluid (m^2/s)
   3.3500E+02  SpdSound       - Speed of sound in working fluid (m/s)
   1.0350E+05  Patm           - Atmospheric pressure (Pa)
   1.7000E+03  Pvap           - Vapour pressure of working fluid (Pa)
   0.0000E+00  WtrDpth        - Water depth (m)
   0.0000E+00  MSL2SWL        - Offset between still-water level and mean sea level (m)
---------------------- INPUT FILES ---------------------------------------------
               EDFile         - Name of file containing ElastoDyn input parameters (-)
  "NRELOffshrBsline5MW_Onshore_ElastoDyn.dat"
               BDBldFile(1)   - Name of file containing BeamDyn blade 1input parameters (-)
  "../5MW_Baseline/NRELOffshrBsline5MW_BeamDyn.dat"
               BDBldFile(2)   - Name of file containing BeamDyn blade 2input parameters (-)
  "../5MW_Baseline/NRELOffshrBsline5MW_BeamDyn.dat"
               BDBldFile(3)   - Name of file containing BeamDyn blade 3input parameters (-)
  "../5MW_Baseline/NRELOffshrBsline5MW_BeamDyn.dat"
               InflowFile     - Name of file containing inflow wind input parameters (-)
  "../5MW_Baseline/NRELOffshrBsline5MW_InflowWind_12mps.dat"
               AeroFile       - Name of file containing aerodynamic input parameters (-)
  "NRELOffshrBsline5MW_Onshore_AeroDyn.dat"
               ServoFile      - Name of file containing control and electrical-drive input parameters (-)
  "NRELOffshrBsline5MW_Onshore_ServoDyn.dat"
               SeaStFile      - Name of file containing sea state input parameters (-)
  "unused"
               HydroFile      - Name of file containing hydrodynamic input parameters (-)
  "unused"
               SubFile        - Name of file containing sub-structural input parameters (-)
  "unused"
               MooringFile    - Name of file containing mooring system input parameters (-)
  "unused"
               IceFile        - Name of file containing ice input parameters (-)
  "unused"
---------------------- OUTPUT --------------------------------------------------
            T  SumPrint       - Print summary data to <RootName>.sum (flag)
   5.0000E+00  SttsTime       - Amount of time between screen status messages (s)
   9.9999E+04  ChkptTime      - Amount of time between creating checkpoint files for potential restart (s)
               DT_Out         - Time step for tabular output (s)
  "default"
   0.0000E+00  TStart         - Time to begin tabular output (s)
            3  OutFileFmt     - Format for tabular (time-marching) output file(s) {0: uncompressed binary and text file, 1: text file [<RootName>.out], 2: compressed binary file [<RootName>.outb], 3: both text and compressed binary, 4: uncompressed binary <RootName>.outb]; add for combinations) (-)
            T  TabDelim       - Use tab delimiters in text tabular output file? (flag)
               OutFmt         - Format used for text tabular output (except time).  Resulting field should be 10 characters. (-)
  "ES10.3E2"
---------------------- LINEARIZATION -------------------------------------------
            F  Linearize      - Linearization analysis (flag)
            F  CalcSteady     - Calculate a steady-state periodic operating point before linearization? (flag)
            3  TrimCase       - Controller parameter to be trimmed {1:yaw; 2:torque; 3:pitch} (-)
   1.0000E-03  TrimTol        - Tolerance for the rotational speed convergence (-)
   1.0000E-02  TrimGain       - Proportional gain for the rotational speed error (>0) (rad/(rad/s) for yaw or pitch; Nm/(rad/s) for torque)
   0.0000E+00  Twr_Kdmp       - Damping factor for the tower (N/(m/s))
   0.0000E+00  Bld_Kdmp       - Damping factor for the blades (N/(m/s))
            2  NLinTimes      - Number of times to linearize (-) [>=1]
         30,         60    LinTimes        - List of times at which to linearize (s) [1 to NLinTimes] [used only when Linearize=True and CalcSteady=False]
            1  LinInputs      - Include inputs in linearization (switch) {0=none; 1=standard; 2=all module inputs (debug)}
            1  LinOutputs     - Include outputs in linearization (switch) (0=none; 1=from OutList(s); 2=all module outputs (debug))
            F  LinOutJac      - Include full Jacabians in linearization output (for debug) (flag)
            F  LinOutMod      - Write module-level linearization output files in addition to output for full system? (flag)
---------------------- VISUALIZATION ------------------------------------------
            0  WrVTK          - Write VTK visualization files (0=none; 1=initialization data only; 2=animation; 3=mode shapes)
            1  VTK_Type       - Type of  VTK visualization data: (1=surfaces; 2=basic meshes (lines/points); 3=all meshes)
            T  VTK_fields     - Write mesh fields to VTK data files? (flag)
   1.5000E+01  VTK_fps        - Frame rate for VTK output(fps)

Below you can see the SevroDyn_Stc.dat file.

Thank you
Best Regards,

Lewis

SevroDyn_Stc.dat

------- STRUCTURAL CONTROL (StC) INPUT FILE ----------------------------
Input file for tuned mass damper, module by Matt Lackner, Meghan Glade, and Semyung Park (UMass)
---------------------- SIMULATION CONTROL --------------------------------------
True          Echo         - Echo input data to <RootName>.ech (flag)
---------------------- StC DEGREES OF FREEDOM ----------------------------------
          1   StC_DOF_MODE - DOF mode (switch) {0: No StC or TLCD DOF; 1: StC_X_DOF, StC_Y_DOF, and/or StC_Z_DOF (three independent StC DOFs); 2: StC_XY_DOF (Omni-Directional StC); 3: TLCD; 4: Prescribed force/moment time series; 5: Force determined by external DLL}
True          StC_X_DOF    - DOF on or off for StC X (flag) [Used only when StC_DOF_MODE=1]
True          StC_Y_DOF    - DOF on or off for StC Y (flag) [Used only when StC_DOF_MODE=1]
False         StC_Z_DOF    - DOF on or off for StC Z (flag) [Used only when StC_DOF_MODE=1]
---------------------- StC LOCATION ------------------------------------------- [relative to the reference origin of component attached to]
          0   StC_P_X      - At rest X position of StC (m)
          0   StC_P_Y      - At rest Y position of StC (m)
         75   StC_P_Z      - At rest Z position of StC (m)
---------------------- StC INITIAL CONDITIONS --------------------------------- [used only when StC_DOF_MODE=1 or 2]
          1   StC_X_DSP    - StC X initial displacement (m) [relative to at rest position]
          1   StC_Y_DSP    - StC Y initial displacement (m) [relative to at rest position]
          0   StC_Z_DSP    - StC Z initial displacement (m) [relative to at rest position; used only when StC_DOF_MODE=1 and StC_Z_DOF=TRUE]
"none"        StC_Z_PreLd  - StC Z pre-load (N) {"gravity" to offset for gravity load; "none" or 0 to turn off} [used only when StC_DOF_MODE=1 and StC_Z_DOF=TRUE]
---------------------- StC CONFIGURATION -------------------------------------- [used only when StC_DOF_MODE=1 or 2]
         10   StC_X_PSP    - Positive stop position (maximum X mass displacement) (m)
        -10   StC_X_NSP    - Negative stop position (minimum X mass displacement) (m)
         10   StC_Y_PSP    - Positive stop position (maximum Y mass displacement) (m)
        -10   StC_Y_NSP    - Negative stop position (minimum Y mass displacement) (m)
         10   StC_Z_PSP    - Positive stop position (maximum Z mass displacement) (m) [used only when StC_DOF_MODE=1 and StC_Z_DOF=TRUE]
        -10   StC_Z_NSP    - Negative stop position (minimum Z mass displacement) (m) [used only when StC_DOF_MODE=1 and StC_Z_DOF=TRUE]
---------------------- StC MASS, STIFFNESS, & DAMPING ------------------------- [used only when StC_DOF_MODE=1 or 2]
      20000   StC_X_M      - StC X mass (kg) [must equal StC_Y_M for StC_DOF_MODE = 2]
      20000   StC_Y_M      - StC Y mass (kg) [must equal StC_X_M for StC_DOF_MODE = 2]
          0   StC_Z_M      - StC Z mass (kg) [used only when StC_DOF_MODE=1 and StC_Z_DOF=TRUE]
      20000   StC_XY_M     - StC XY mass (kg) [used only when StC_DOF_MODE=2]
          0   StC_X_K      - StC X stiffness (N/m) [Set to 0 to use Vampire Model exclusively]
          0   StC_Y_K      - StC Y stiffness (N/m) [Set to 0 to use Vampire Model exclusively]
          0   StC_Z_K      - StC Z stiffness (N/m) [used only when StC_DOF_MODE=1 and StC_Z_DOF=TRUE]
		0  StC_X_C      - StC X damping (N/(m/s))
		0   StC_Y_C      - StC Y damping (N/(m/s))
          0   StC_Z_C      - StC Z damping (N/(m/s)) [used only when StC_DOF_MODE=1 and StC_Z_DOF=TRUE]
      15000   StC_X_KS     - Stop spring X stiffness (N/m)
      15000   StC_Y_KS     - Stop spring Y stiffness (N/m)
          0   StC_Z_KS     - Stop spring Z stiffness (N/m) [used only when StC_DOF_MODE=1 and StC_Z_DOF=TRUE]
      10000   StC_X_CS     - Stop spring X damping (N/(m/s))
      10000   StC_Y_CS     - Stop spring Y damping (N/(m/s))
          0   StC_Z_CS     - Stop spring Z damping (N/(m/s)) [used only when StC_DOF_MODE=1 and StC_Z_DOF=TRUE]
---------------------- StC USER-DEFINED SPRING FORCES ------------------------- [used only when StC_DOF_MODE=1 or 2]
False         Use_F_TBL    - Use spring force from user-defined table (flag)
         17   NKInpSt      - Number of spring force input stations
---------------------- StC SPRING FORCES TABLE -------------------------------- [used only when StC_DOF_MODE=1 or 2]
    X                 F_X               Y               F_Y               Z               F_Z
   (m)               (N)               (m)             (N)               (m)             (N)
-6.0000000E+00  -4.8000000E+06  -6.0000000E+00  -4.8000000E+06  -6.0000000E+00  -4.8000000E+06
-5.0000000E+00  -2.4000000E+06  -5.0000000E+00  -2.4000000E+06  -5.0000000E+00  -2.4000000E+06
-4.5000000E+00  -1.2000000E+06  -4.5000000E+00  -1.2000000E+06  -4.5000000E+00  -1.2000000E+06
-4.0000000E+00  -6.0000000E+05  -4.0000000E+00  -6.0000000E+05  -4.0000000E+00  -6.0000000E+05
-3.5000000E+00  -3.0000000E+05  -3.5000000E+00  -3.0000000E+05  -3.5000000E+00  -3.0000000E+05
-3.0000000E+00  -1.5000000E+05  -3.0000000E+00  -1.5000000E+05  -3.0000000E+00  -1.5000000E+05
-2.5000000E+00  -1.0000000E+05  -2.5000000E+00  -1.0000000E+05  -2.5000000E+00  -1.0000000E+05
-2.0000000E+00  -6.5000000E+04  -2.0000000E+00  -6.5000000E+04  -2.0000000E+00  -6.5000000E+04
 0.0000000E+00   0.0000000E+00   0.0000000E+00   0.0000000E+00   0.0000000E+00   0.0000000E+00
 2.0000000E+00   6.5000000E+04   2.0000000E+00   6.5000000E+04   2.0000000E+00   6.5000000E+04
 2.5000000E+00   1.0000000E+05   2.5000000E+00   1.0000000E+05   2.5000000E+00   1.0000000E+05
 3.0000000E+00   1.5000000E+05   3.0000000E+00   1.5000000E+05   3.0000000E+00   1.5000000E+05
 3.5000000E+00   3.0000000E+05   3.5000000E+00   3.0000000E+05   3.5000000E+00   3.0000000E+05
 4.0000000E+00   6.0000000E+05   4.0000000E+00   6.0000000E+05   4.0000000E+00   6.0000000E+05
 4.5000000E+00   1.2000000E+06   4.5000000E+00   1.2000000E+06   4.5000000E+00   1.2000000E+06
 5.0000000E+00   2.4000000E+06   5.0000000E+00   2.4000000E+06   5.0000000E+00   2.4000000E+06
 6.0000000E+00   4.8000000E+06   6.0000000E+00   4.8000000E+06   6.0000000E+00   4.8000000E+06
---------------------- StructCtrl CONTROL -------------------------------------------- [used only when StC_DOF_MODE=1 or 2]
          0   StC_CMODE     - Control mode (switch) {0:none; 1: Semi-Active Control Mode; 4: Active Control Mode through Simulink (not available); 5: Active Control Mode through Bladed interface}
          0   StC_CChan     - Control channel group (1:10) for stiffness and damping (StC_[XYZ]_K, StC_[XYZ]_C, and StC_[XYZ]_Brake) (specify additional channels for blade instances of StC active control -- one channel per blade) [used only when StC_DOF_MODE=1 or 2, and StC_CMODE=4 or 5]
          1   StC_SA_MODE   - Semi-Active control mode {1: velocity-based ground hook control; 2: Inverse velocity-based ground hook control; 3: displacement-based ground hook control 4: Phase difference Algorithm with Friction Force 5: Phase difference Algorithm with Damping Force} (-)
          0   StC_X_C_HIGH  - StC X high damping for ground hook control
          0   StC_X_C_LOW   - StC X low damping for ground hook control
          0   StC_Y_C_HIGH  - StC Y high damping for ground hook control
          0   StC_Y_C_LOW   - StC Y low damping for ground hook control
          0   StC_Z_C_HIGH  - StC Z high damping for ground hook control [used only when StC_DOF_MODE=1 and StC_Z_DOF=TRUE]
          0   StC_Z_C_LOW   - StC Z low damping for ground hook control  [used only when StC_DOF_MODE=1 and StC_Z_DOF=TRUE]
          0   StC_X_C_BRAKE - StC X high damping for braking the StC (Don't use it now. should be zero)
          0   StC_Y_C_BRAKE - StC Y high damping for braking the StC (Don't use it now. should be zero)
          0   StC_Z_C_BRAKE - StC Z high damping for braking the StC (Don't use it now. should be zero) [used only when StC_DOF_MODE=1 and StC_Z_DOF=TRUE]
---------------------- TLCD --------------------------------------------------- [used only when StC_DOF_MODE=3]
     7.9325   L_X           - X TLCD total length (m)
     6.5929   B_X           - X TLCD horizontal length (m)
     2.0217   area_X        - X TLCD cross-sectional area of vertical column (m^2)
      0.913   area_ratio_X  - X TLCD cross-sectional area ratio (vertical column area divided by horizontal column area) (-)
     2.5265   headLossCoeff_X - X TLCD head loss coeff (-)
       1000   rho_X         - X TLCD liquid density (kg/m^3)
     3.5767   L_Y           - Y TLCD total length (m)
     2.1788   B_Y           - Y TLCD horizontal length (m)
     1.2252   area_Y        - Y TLCD cross-sectional area of vertical column (m^2)
     2.7232   area_ratio_Y  - Y TLCD cross-sectional area ratio (vertical column area divided by horizontal column area) (-)
     0.6433   headLossCoeff_Y - Y TLCD head loss coeff (-)
       1000   rho_Y         - Y TLCD liquid density (kg/m^3)
True          UseVampireModel    - Use Vampire nonlinear spring model (flag)
80000.0       Vampire_k1         - Vampire model spring k1 [N/m] (Original Stiffness)
40000.0        Vampire_k2         - Vampire model spring k2 [N/m]
10000.0         Vampire_k3         - Vampire model spring k3 [N/m]
10000.0         Vampire_Cie        - Vampire model damping Cie [N/(m/s)]
500.0         Vampire_mie        - Vampire model internal mass mie [kg]
---------------------- PRESCRIBED TIME SERIES --------------------------------- [used only when StC_DOF_MODE=4]
          0   PrescribedForcesCoord- Prescribed forces are in global or local coordinates (switch) {1: global; 2: local}
"TimeForceSeries.dat"  PrescribedForcesFile   - Time series force and moment (7 columns of time, FX, FY, FZ, MX, MY, MZ)
-------------------------------------------------------------------------------```

2 replies

jjonkman Feb 17, 2026
Collaborator

Dear @Mclq666,

Can you share the Echo file associated with your SevroDyn_Stc.dat input file?

By the way: I see you added your Vampire-related inputs to the TLCD option (StC_DOF_MODE = 3), but that you have selected StC_DOF_MODE = 1; perhaps this is pointing to the problem?

Best regards,

Answer selected by Mclq666

andrew-platt Feb 17, 2026
Maintainer

Are your code changes on GitHub?

Mclq666 · 2026-02-18T06:01:55Z

Mclq666
Feb 18, 2026
Author

Dear @jjonkman,

yes you are right, I changed the StC_DOF_MODE = 3 and it worked

Best regards,

0 replies

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