Hi all,

I got some errors when running the simulation using test 24 under the extreme condition as followed:

35.7m/s turbulent wind, Hs = 14.1m, Tp = 14.3s, turbine parked (rotor speed = 0).

According to Dr Jonkman’s article “Dynamics of offshore floating wind turbines—analysis of three concepts”, FAST can run normally under even harsher environment conditions, therefore I guess some modifications might be made somewhere when the loads are extremely high.

Here are some of the error messages I got:

FAST_Solution:CalcOutputs_And_SolveForInputs:SolveOption1:ED_HD_InputOutputSolve:HydroDyn_CalcOutp

ut: Angles in GetSmllRotAngs() are larger than 0.4 radians.

ED_HD_InputOutputSolve:HydroDyn_CalcOutput: Angles in GetSmllRotAngs() are larger than 0.4

radians.

FAST_Solution:FAST_AdvanceStates:AD_UpdateStates:BEMT_UpdateStates(node 5, blade

1):BEMT_UnCoupledSolve:There is no valid value of phi for these operating conditions: Vx =

-4.8869, Vy = -240.97, rlocal = 11.757, theta = 0.23226, geometric phi = -3.1213

BEMT_UpdateStates(node 6, blade 1):BEMT_UnCoupledSolve:There is no valid value of phi for these

operating conditions: Vx = -21.538, Vy = -283.77, rlocal = 15.859, theta = 0.20035, geometric phi

= -3.0658

BEMT_UpdateStates(node 7, blade 1):BEMT_UnCoupledSolve:There is no valid value of phi for these

operating conditions: Vx = -40.407, Vy = -329.69, rlocal = 19.956, theta = 0.17734, geometric phi

= -3.0196

BEMT_UpdateStates(node 8, blade 1):BEMT_UnCoupledSolve:There is no valid value of phi for these

operating conditions: Vx = -54.007, Vy = -378.24, rlocal = 24.054, theta = 0.15725, geometric phi

= -2.9998

FAST_Solution:CalcOutputs_And_SolveForInputs:SolveOption1:ED_HD_InputOutputSolve:HydroDyn_CalcOutp

ut: Angles in GetSmllRotAngs() are larger than 0.4 radians.

E

FAST_Solution:CalcOutputs_And_SolveForInputs:SolveOption1:ED_HD_InputOutputSolve:HydroDyn_CalcOutp

ut: Angles in GetSmllRotAngs() are larger than 0.4 radians.

ED_HD_InputOutputSolve:HydroDyn_CalcOutput: Angles in GetSmllRotAngs() are larger than 0.4

radians.

FAST_Solution:CalcOutputs_And_SolveForInputs:SolveOption2:InflowWind_CalcOutput:CalcOutput:IfW_TSF

FWind_CalcOutput [position=(5986.1, -6780.8, -9175.3) in wind-file coordinates]: Error: FF wind

array was exhausted at 5.15 seconds (trying to access data at -101.59 seconds).

CalcOutputs_And_SolveForInputs:SolveOption1:ED_HD_InputOutputSolve:HydroDyn_CalcOutput: Angles in

GetSmllRotAngs() are larger than 0.4 radians.

ED_HD_InputOutputSolve:HydroDyn_CalcOutput: Angles in GetSmllRotAngs() are larger than 0.4

radians.

FAST encountered an error at simulation time 5.1375 of 3000 seconds.

Simulation error level: FATAL ERROR

Aborting FAST.

I would be very appreciate if anyone could help with this situation.