Hi @Jason.Jonkman:
I have set PtfmYDOF to False and the simulation starts but I get a series of errors as shown below.
FAST_Solution:FAST_AdvanceStates:ED_ABM4: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(): 6.50000E-02 s**
FAST_Solution:CalcOutputs_And_SolveForInputs:SolveOption2:AD14_CalcOutput:ELEMFRC:BeddoesModel:ATT
ACH: Blade #2 element #37 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:ED_CalcContStateDeriv:LAPACK_DGETRF: U( 16,
16)=0. Factor U is exactly singular.
CalcOutputs_And_SolveForInputs:SolveOption2:AD14_CalcOutput:ELEMFRC:BeddoesModel:ATTACH: Blade #2
element #22 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.
CalcOutputs_And_SolveForInputs:SolveOption1:ED_SD_HD_BD_Orca_InputOutputSolve:ED_CalcContStateDeri
v:LAPACK_DGETRF: U( 16, 16)=0. Factor U is exactly singular.
** FAST encountered an error at simulation time 0.2 of 3600 seconds. Simulation error level: FATAL ERROR
It seemed as if if the deflections on the blades were too large, so I increased the blade structural damping but this does not solve he problem.
Regards,
AOAW