Error in 2nd Mode Shape from WISDEM #395
Description
Description
I wanted to run the WEIS case weis_driver_umaine_semi.py.
I run it as it is, and it worked, but the OpenFAST simulation is only 1 second long.
Then, in weis_driver_umaine_semi.py, I set TEST_RUN = False, and re-run weis_driver_umaine_semi.py. All ok again, but still 1 second long.
I therefore set the simulation length to 60 seconds as follow:
``
Steps to reproduce issue
Please provide a minimum working example (MWE) if possible
- Installed WEIS (main)
- Went to the folder \examples\06_IEA-15-240-RWT
- modified weis_driver_umaine_semi, setting
TEST_RUN = False - modified modeling_options_umaine_semi.yaml, setting
analysis_time: 60. - run the weis case
python weis_driver_umaine_semi.py
Current behavior
When running OpenFAST, the following happens:
'
Generator speed: 7.5 RPM, Pitch angle: 5.9 deg, Power: 0.0 kW, Est. wind Speed: 11.5 m/s
FAST_Solution:FAST_UpdateStates:FAST_AdvanceStates:SrvD_UpdateStates:DLL_controller_call:BladedInt
erface option was designed for an explicit-loose coupling scheme. Using last calculated values
from DLL on all subsequent calls until time is advanced. Warning will not be displayed again.
FAST_Solution:FAST_UpdateStates:CalcOutputs_And_SolveForInputs:SolveOption2:AD_CalcOutput:RotCalcO
utput:BEMT_CalcOutput(node 3, blade 3):UA_CalcOutput:UA_BlendSteady:Temporarily turning off UA
due to high angle of attack or low relative velocity. This warning will not be repeated though
the condition may persist.
FAST_Solution:FAST_UpdateStates:CalcOutputs_And_SolveForInputs:SolveOption2:AD_CalcOutput:RotCalcO
utput:BEMT_CalcOutput(node 56, blade 1):UA_CalcOutput:Mach number exceeds 0.3. Theory is invalid.
This warning will not be repeated though the condition may persist.
Warning: SkewedWakeCorrection encountered a large value of chi (91.805 deg), so the yaw
correction will be limited. This warning will not be repeated though the condition may persist.
See the AD chi output channels, and consider turning off the Pitt/Peters skew model (set
SkewMod=1) if this condition persists.
The BEM solution is being turned off due to low TSR. (TSR = 0.94435). This warning will not be
repeated though the condition may persist. (See GeomPhi output channel.)
FAST_Solution:FAST_UpdateStates:FAST_AdvanceStates:SolveOption2a_Inp2BD:ED_CalcContStateDeriv:SetC
oordSy:Small angle assumption violated in SUBROUTINE SmllRotTrans() due to a large blade
deflection (ElastoDyn SetCoordSy). The solution may be inaccurate. Simulation continuing, but
future warnings from SmllRotTrans() will be suppressed.
Additional debugging message from SUBROUTINE SmllRotTrans(): 2.67 s
ED_CalcContStateDeriv:SetCoordSy:Small angle assumption violated in SUBROUTINE SmllRotTrans() due
to a large blade deflection (ElastoDyn SetCoordSy). The solution may be inaccurate. Simulation
continuing, but future warnings from SmllRotTrans() will be suppressed.
Additional debugging message from SUBROUTINE SmllRotTrans(): 2.67 s
FAST_AdvanceStates:AD_UpdateStates:BEMT_UpdateStates:UpdatePhi(node 18, blade
2):BEMT_UnCoupledSolve:There is no valid value of phi for these operating conditions: Vx =
41.514, Vy = -608.72, rlocal = 37.674, theta = 0.1752, geometric phi = 3.0735. This warning will
not be repeated though the condition may persist. (See GeomPhi output channel.)
FAST_UpdateStates:CalcOutputs_And_SolveForInputs:SolveOption2:AD_CalcOutput:RotCalcOutput:BEMT_Cal
cOutput(node 3, blade 1):UA_CalcOutput:Mach number exceeds 1.0. Equations cannot be evaluated.
OpenFAST encountered an error at simulation time 2.67 of 60 seconds.
Simulation error level: FATAL ERROR
Aborting OpenFAST.
'
Expected behavior
OpenFAST running smoothly up to 60 seconds.
Code versions
- I downgraded openfast-io to 4.0.2 as per other issue