Error message

Wind & Water General
1

Hi, anyone out there who can help explain this error message. I am a new user of this program working with NREL 5MW turbine and in the process of designing a monopile substructure. When I set the TurbModel to “IECKAI” and the IEC_WindType to “3EWM50” in Turbsim, I get this error. Could anyone, please help in rectifying this issue!

Thanks in advance

Samuel C Nwafor
Aalborg University Esbjerg, Denmark

Supersonic mach nos. will be set to 0.7 to attempt continuation.

FAST_Solution:CalcOutputs_And_SolveForInputs:SolveOption2:AD14_CalcOutput:ELEMFRC:BeddoesModel:ATT
ACH: Supersonic condition has subsided with Blade #1 element #4.
Timestep: 89 of 600 seconds. Estimated final completion at 02:53:30.

FAST_Solution:CalcOutputs_And_SolveForInputs:SolveOption2:AD14_CalcOutput:ELEMFRC:BeddoesModel:ATT
ACH: Blade #2 element #17 is supersonic! Other elements are likely supersonic as well.
Supersonic mach nos. will be set to 0.7 to attempt continuation.
AD14_CalcOutput:ELEMFRC:BeddoesModel:ATTACH: Supersonic condition has subsided with Blade #3
element #4.

FAST_Solution:CalcOutputs_And_SolveForInputs:SolveOption2:AD14_CalcOutput:ELEMFRC:BeddoesModel:ATT
ACH: Blade #3 element #17 is supersonic! Other elements are likely supersonic as well.
Supersonic mach nos. will be set to 0.7 to attempt continuation.

FAST_Solution:CalcOutputs_And_SolveForInputs:SolveOption2:AD14_CalcOutput:ELEMFRC:BeddoesModel:ATT
ACH: Supersonic condition has subsided with Blade #1 element #4.

FAST_Solution:CalcOutputs_And_SolveForInputs:SolveOption2:AD14_CalcOutput:ELEMFRC:BeddoesModel:ATT
ACH: Blade #3 element #15 is supersonic! Other elements are likely supersonic as well.
Supersonic mach nos. will be set to 0.7 to attempt continuation.

FAST_Solution:CalcOutputs_And_SolveForInputs:SolveOption2:AD14_CalcOutput:ELEMFRC:BeddoesModel:ATT
ACH: Supersonic condition has subsided with Blade #1 element #4.

FAST_Solution:CalcOutputs_And_SolveForInputs:SolveOption2:AD14_CalcOutput:ELEMFRC:BeddoesModel:ATT
ACH: Blade #3 element #17 is supersonic! Other elements are likely supersonic as well.
Supersonic mach nos. will be set to 0.7 to attempt continuation.

FAST_Solution:CalcOutputs_And_SolveForInputs:SolveOption2:AD14_CalcOutput:ELEMFRC:BeddoesModel:ATT
ACH: Supersonic condition has subsided with Blade #1 element #4.

FAST_Solution:CalcOutputs_And_SolveForInputs:SolveOption2:AD14_CalcOutput:ELEMFRC:BeddoesModel:ATT
ACH: Blade #3 element #17 is supersonic! Other elements are likely supersonic as well.
Supersonic mach nos. will be set to 0.7 to attempt continuation.

FAST_Solution:CalcOutputs_And_SolveForInputs:SolveOption2:AD14_CalcOutput:ELEMFRC:BeddoesModel:ATT
ACH: Supersonic condition has subsided with Blade #1 element #4.

FAST_Solution:CalcOutputs_And_SolveForInputs:SolveOption2:AD14_CalcOutput:ELEMFRC:BeddoesModel:ATT
ACH: Blade #2 element #15 is supersonic! Other elements are likely supersonic as well.
Supersonic mach nos. will be set to 0.7 to attempt continuation.
AD14_CalcOutput:ELEMFRC:BeddoesModel:ATTACH: Supersonic condition has subsided with Blade #2
element #17.
AD14_CalcOutput:ELEMFRC:BeddoesModel:ATTACH: Blade #3 element #12 is supersonic! Other elements
are likely supersonic as well. Supersonic mach nos. will be set to 0.7 to attempt continuation.

FAST_Solution:CalcOutputs_And_SolveForInputs:SolveOption2:AD14_CalcOutput:ELEMFRC:BeddoesModel:ATT
ACH: Supersonic condition has subsided with Blade #1 element #4.

FAST_Solution:CalcOutputs_And_SolveForInputs:SolveOption2:AD14_CalcOutput:ELEMFRC:BeddoesModel:ATT
ACH: Blade #2 element #17 is supersonic! Other elements are likely supersonic as well.
Supersonic mach nos. will be set to 0.7 to attempt continuation.
AD14_CalcOutput:ELEMFRC:BeddoesModel:ATTACH: Supersonic condition has subsided with Blade #3
element #4.

FAST_Solution:CalcOutputs_And_SolveForInputs:SolveOption2:AD14_CalcOutput:ELEMFRC:BeddoesModel:ATT
ACH: Blade #1 element #16 is supersonic! Other elements are likely supersonic as well.
Supersonic mach nos. will be set to 0.7 to attempt continuation.
AD14_CalcOutput:ELEMFRC:BeddoesModel:ATTACH: Supersonic condition has subsided with Blade #2
element #4.
AD14_CalcOutput:ELEMFRC:BeddoesModel:ATTACH: Blade #2 element #13 is supersonic! Other elements
are likely supersonic as well. Supersonic mach nos. will be set to 0.7 to attempt continuation.
AD14_CalcOutput:ELEMFRC:BeddoesModel:ATTACH: Supersonic condition has subsided with Blade #3
element #4.
AD14_CalcOutput:ELEMFRC:BeddoesModel:ATTACH: Blade #3 element #13 is supersonic! Other elements
are likely supersonic as well. Supersonic mach nos. will be set to 0.7 to attempt continuation.

FAST_Solution:CalcOutputs_And_SolveForInputs:SolveOption2:AD14_CalcOutput:ELEMFRC:BeddoesModel:ATT
ACH: Supersonic condition has subsided with Blade #1 element #4.

FAST_Solution:CalcOutputs_And_SolveForInputs:SolveOption2:AD14_CalcOutput:ELEMFRC:BeddoesModel:ATT
ACH: Blade #1 element #15 is supersonic! Other elements are likely supersonic as well.
Supersonic mach nos. will be set to 0.7 to attempt continuation.
AD14_CalcOutput:ELEMFRC:BeddoesModel:ATTACH: Supersonic condition has subsided with Blade #2
element #4.
AD14_CalcOutput:ELEMFRC:BeddoesModel:ATTACH: Blade #3 element #15 is supersonic! Other elements
are likely supersonic as well. Supersonic mach nos. will be set to 0.7 to attempt continuation.

FAST_Solution:CalcOutputs_And_SolveForInputs:SolveOption2:AD14_CalcOutput:ELEMFRC:BeddoesModel:ATT
ACH: Supersonic condition has subsided with Blade #1 element #4.

FAST_Solution:CalcOutputs_And_SolveForInputs:SolveOption2:AD14_CalcOutput:ELEMFRC:BeddoesModel:ATT
ACH: Blade #1 element #13 is supersonic! Other elements are likely supersonic as well.
Supersonic mach nos. will be set to 0.7 to attempt continuation.
AD14_CalcOutput:ELEMFRC:BeddoesModel:ATTACH: Supersonic condition has subsided with Blade #2
element #4.

FAST_Solution:CalcOutputs_And_SolveForInputs:SolveOption2:AD14_CalcOutput:ELEMFRC:BeddoesModel:ATT
ACH: Blade #1 element #17 is supersonic! Other elements are likely supersonic as well.
Supersonic mach nos. will be set to 0.7 to attempt continuation.
AD14_CalcOutput:ELEMFRC:BeddoesModel:ATTACH: Supersonic condition has subsided with Blade #2
element #4.

FAST_Solution:CalcOutputs_And_SolveForInputs:SolveOption2:AD14_CalcOutput:ELEMFRC:BeddoesModel:ATT
ACH: Blade #1 element #14 is supersonic! Other elements are likely supersonic as well.
Supersonic mach nos. will be set to 0.7 to attempt continuation.
AD14_CalcOutput:ELEMFRC:BeddoesModel:ATTACH: Supersonic condition has subsided with Blade #2
element #4.
Timestep: 90 of 600 seconds. Estimated final completion at 02:53:45.

FAST_Solution:CalcOutputs_And_SolveForInputs:SolveOption2:AD14_CalcOutput:ELEMFRC:BeddoesModel:ATT
ACH: Blade #2 element #13 is supersonic! Other elements are likely supersonic as well.
Supersonic mach nos. will be set to 0.7 to attempt continuation.
AD14_CalcOutput:ELEMFRC:BeddoesModel:ATTACH: Supersonic condition has subsided with Blade #3
element #4.

FAST_Solution:CalcOutputs_And_SolveForInputs:SolveOption2:AD14_CalcOutput:ELEMFRC:BeddoesModel:ATT
ACH: Blade #2 element #11 is supersonic! Other elements are likely supersonic as well.
Supersonic mach nos. will be set to 0.7 to attempt continuation.
AD14_CalcOutput:ELEMFRC:BeddoesModel:ATTACH: Supersonic condition has subsided with Blade #3
element #4.

FAST_Solution:CalcOutputs_And_SolveForInputs:SolveOption2:AD14_CalcOutput:ELEMFRC:BeddoesModel:ATT
ACH: Blade #2 element #16 is supersonic! Other elements are likely supersonic as well.
Supersonic mach nos. will be set to 0.7 to attempt continuation.
AD14_CalcOutput:ELEMFRC:BeddoesModel:ATTACH: Supersonic condition has subsided with Blade #3
element #4.

FAST_Solution:CalcOutputs_And_SolveForInputs:SolveOption2:AD14_CalcOutput:ELEMFRC:BeddoesModel:ATT
ACH: Blade #2 element #11 is supersonic! Other elements are likely supersonic as well.
Supersonic mach nos. will be set to 0.7 to attempt continuation.
AD14_CalcOutput:ELEMFRC:BeddoesModel:ATTACH: Supersonic condition has subsided with Blade #3
element #4.

FAST_Solution:CalcOutputs_And_SolveForInputs:SolveOption2:AD14_CalcOutput:ELEMFRC:BeddoesModel:ATT
ACH: Blade #2 element #17 is supersonic! Other elements are likely supersonic as well.
Supersonic mach nos. will be set to 0.7 to attempt continuation.
AD14_CalcOutput:ELEMFRC:BeddoesModel:ATTACH: Supersonic condition has subsided with Blade #3
element #4.

FAST_Solution:CalcOutputs_And_SolveForInputs:SolveOption2:AD14_CalcOutput:ELEMFRC:BeddoesModel:ATT
ACH: Blade #2 element #17 is supersonic! Other elements are likely supersonic as well.
Supersonic mach nos. will be set to 0.7 to attempt continuation.
AD14_CalcOutput:ELEMFRC:BeddoesModel:ATTACH: Supersonic condition has subsided with Blade #3
element #4.

FAST_Solution:CalcOutputs_And_SolveForInputs:SolveOption2:AD14_CalcOutput:ELEMFRC:BeddoesModel:ATT
ACH: Blade #1 element #14 is supersonic! Other elements are likely supersonic as well.
Supersonic mach nos. will be set to 0.7 to attempt continuation.
AD14_CalcOutput:ELEMFRC:BeddoesModel:ATTACH: Supersonic condition has subsided with Blade #2
element #4.
AD14_CalcOutput:ELEMFRC:BeddoesModel:ATTACH: Blade #2 element #13 is supersonic! Other elements
are likely supersonic as well. Supersonic mach nos. will be set to 0.7 to attempt continuation.
AD14_CalcOutput:ELEMFRC:BeddoesModel:ATTACH: Supersonic condition has subsided with Blade #2
element #15.

FAST_Solution:CalcOutputs_And_SolveForInputs:SolveOption2:AD14_CalcOutput:ELEMFRC:BeddoesModel:ATT
ACH: Blade #1 element #14 is supersonic! Other elements are likely supersonic as well.
Supersonic mach nos. will be set to 0.7 to attempt continuation.
AD14_CalcOutput:ELEMFRC:BeddoesModel:ATTACH: Supersonic condition has subsided with Blade #2
element #4.
AD14_CalcOutput:ELEMFRC:BeddoesModel:ATTACH: Blade #2 element #13 is supersonic! Other elements
are likely supersonic as well. Supersonic mach nos. will be set to 0.7 to attempt continuation.
AD14_CalcOutput:ELEMFRC:BeddoesModel:ATTACH: Supersonic condition has subsided with Blade #3
element #4.
AD14_CalcOutput:ELEMFRC:BeddoesModel:ATTACH: Blade #3 element #17 is supersonic! Other elements
are likely supersonic as well. Supersonic mach nos. will be set to 0.7 to attempt continuation.

FAST_Solution:CalcOutputs_And_SolveForInputs:SolveOption2:AD14_CalcOutput:ELEMFRC:BeddoesModel:ATT
ACH: Supersonic condition has subsided with Blade #1 element #4.
AD14_CalcOutput:ELEMFRC:BeddoesModel:ATTACH: Blade #1 element #6 is supersonic! Other elements
are likely supersonic as well. Supersonic mach nos. will be set to 0.7 to attempt continuation.
AD14_CalcOutput:ELEMFRC:BeddoesModel:ATTACH: Supersonic condition has subsided with Blade #2
element #4.
AD14_CalcOutput:ELEMFRC:BeddoesModel:ATTACH: Blade #2 element #9 is supersonic! Other elements
are likely supersonic as well. Supersonic mach nos. will be set to 0.7 to attempt continuation.
AD14_CalcOutput:ELEMFRC:BeddoesModel:ATTACH: Supersonic condition has subsided with Blade #3
element #4.
AD14_CalcOutput:ELEMFRC:BeddoesModel:ATTACH: Blade #3 element #6 is supersonic! Other elements
are likely supersonic as well. Supersonic mach nos. will be set to 0.7 to attempt continuation.
FAST_Solution:CalcOutputs_And_SolveForInputs:SolveOption2:InflowWind_CalcOu

FAST encountered an error at simulation time 90.525 of 600 seconds.
Simulation error level: FATAL ERROR

Aborting FAST.

C:\Users\Sam\Documents\AAU ESBJERG\Project work\BM-2 Doc\CertTest>

2

Dear Samuel,

My guess is that your model is going numerically unstable for some reason. Warnings regarding a “small angle approximation violation,” warnings regarding “supersonic blades,” a simulation crash, or very large deflections that occur in the time series are good signs of a numerical instability. Without knowing more about your simulation settings, it’s hard to know that what the problem is. Please use “Search…” in the upper right of the forum to search for “supersonic” to see how we’ve solved similar problems in the past.

If you are using IEC_WindType = 3EWM50, I would guess you are trying to model a situation with a parked/idling rotor in high winds with the blades feathered to 90 deg. Normally we’d disable induction and the Beddoes-Leishman unsteady airfoil aerodynamics models for such cases.

Best regards,

3

Dear All,
I found an error as below while running OpenFAST under Forced Vibration. What would be the reason. Can Someone help me to fix this?
G:\OpenFAST\Unzipped\openfast-2.3.0\Trial 2>“openfast_x64.exe” “5MW_OC3Spar_DLL_WTurb_WavesIrr.fst”

OpenFAST

Copyright (C) National Renewable Energy Laboratory
Copyright (C) Envision Energy USA LTD

This program is licensed under Apache License Version 2.0 and comes with ABSOLUTELY NO WARRANTY.
See the “LICENSE” file distributed with this software for details.

OpenFAST-v2.3.0
Compile Info:

Architecture: 64 bit
Precision: single
Date: Apr 03 2020
Time: 14:02:42
Execution Info:
Date: 09/27/2020
Time: 15:32:51+0530
OpenFAST input file heading:
FAST Certification Test #24: NREL 5.0 MW Baseline Wind Turbine with OC3 Hywind Configuration,
for use in offshore analysis

Running ElastoDyn.
Running AeroDyn.
Running BEM.
Running UnsteadyAero.
Warning: Turning off Unsteady Aerodynamics because C_nalpha is 0. BladeNode = 1, Blade = 1
Warning: Turning off Unsteady Aerodynamics because C_nalpha is 0. BladeNode = 2, Blade = 1
Warning: Turning off Unsteady Aerodynamics because C_nalpha is 0. BladeNode = 3, Blade = 1
Warning: Turning off Unsteady Aerodynamics because C_nalpha is 0. BladeNode = 4, Blade = 1
Warning: Turning off Unsteady Aerodynamics because C_nalpha is 0. BladeNode = 1, Blade = 2
Warning: Turning off Unsteady Aerodynamics because C_nalpha is 0. BladeNode = 2, Blade = 2
Warning: Turning off Unsteady Aerodynamics because C_nalpha is 0. BladeNode = 3, Blade = 2
Warning: Turning off Unsteady Aerodynamics because C_nalpha is 0. BladeNode = 4, Blade = 2
Warning: Turning off Unsteady Aerodynamics because C_nalpha is 0. BladeNode = 1, Blade = 3
Warning: Turning off Unsteady Aerodynamics because C_nalpha is 0. BladeNode = 2, Blade = 3
Warning: Turning off Unsteady Aerodynamics because C_nalpha is 0. BladeNode = 3, Blade = 3
Warning: Turning off Unsteady Aerodynamics because C_nalpha is 0. BladeNode = 4, Blade = 3
Running InflowWind.

Reading a 13x13 grid (80 m wide, 44.288 m to 124.29 m above ground) with a characteristic wind
speed of 18.2 m/s. This full-field file was generated by TurbSim (v1.06.00, 21-Sep-2012) on
27-Sep-2020 at 15:12:57.

Processed 888 time steps of 20-Hz full-field data (44.35 seconds).
Running ServoDyn.
Running ServoDyn Interface for Bladed Controllers.
Running HydroDyn.
Generating incident wave kinematics and current time history.
Reading in WAMIT output with root name “G:\OpenFAST\Unzipped\openfast-2.3.0\Trial
2\5MW_Baseline…/5MW_Baseline/HydroData/Spar”.
Computing radiation impulse response functions and wave diffraction forces.

MAP++ environment properties (set externally)…
Gravity constant [m/s^2] : 9.81
Sea density [kg/m^3] : 1025.00
Water depth [m] : 320.00
Vessel reference position [m] : 0.00 , 0.00 , 0.00

Time: 0 of 1000 seconds.

FAST_Solution0:CalcOutputs_And_SolveForInputs:SolveOption2:SolveOption2c_Inp2AD_SrvD:InflowWind_Ca
lcOutput:CalcOutput:IfW_TSFFWind_CalcOutput [position=(-3.3687, -0.38458, 130.42) in wind-file
coordinates]: FF wind array boundaries violated. Grid too small in Z direction (Z=130.42 m is
above the grid).
SolveOption2:SrvD_CalcOutput:Running with torque and pitch control of the NREL offshore 5MW
baseline wind turbine from DISCON.dll as written by J. Jonkman of NREL/NWTC for use in the IEA
Annex XXIII OC3 studies. Includes modifications for the Hywind spar.

FAST encountered an error during simulation initialization.
Simulation error level: FATAL ERROR

Aborting OpenFAST.

4

Dear Akheel,

It looks like you asked the same question in the issues page of the OpenFAST github repository and the question was answered there: github.com/OpenFAST/openfast/issues/268.

Best regards,