openfast
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OpenFAST
Tower Strike and tower clearance
I'm running openfast 3.5.3.
I've been getting some issues with tower strikes. I can't seem to work out why. This may be due to a misunderstanding on my part, so I'm keen to hear what you guys think. I've checked my blade tip deflection with externally with two other softwares and it shouldn't impact the tower. When I run openfast, my outputs seem to show that my tower clearance is fine, however openfast fails with the error tower strike.
AD inputs:
11 NumTwrNds - Number of tower nodes used in the analysis (-) [used only when TwrPotent/=0, TwrShadow/=0, TwrAero=True, or Buoyancy=True]
TwrElev TwrDiam TwrCd TwrTI TwrCb !TwrTI used only with TwrShadow=2, TwrCb used only with Buoyancy=True
(m) (m) (-) (-) (-)
0.000000000000000e+00 3.200000000000000e+00 0.500000000000000e+00 1.000000000000000e-01 0.000000000000000e+00
3.340000000000000e+00 3.080000000000000e+00 0.500000000000000e+00 1.000000000000000e-01 0.000000000000000e+00
6.680000000000000e+00 2.960000000000000e+00 0.500000000000000e+00 1.000000000000000e-01 0.000000000000000e+00
1.002000000000000e+01 2.840000000000000e+00 0.500000000000000e+00 1.000000000000000e-01 0.000000000000000e+00
1.336000000000000e+01 2.720000000000000e+00 0.500000000000000e+00 1.000000000000000e-01 0.000000000000000e+00
1.670000000000000e+01 2.600000000000000e+00 0.500000000000000e+00 1.000000000000000e-01 0.000000000000000e+00
2.004000000000000e+01 2.480000000000000e+00 0.500000000000000e+00 1.000000000000000e-01 0.000000000000000e+00
2.338000000000000e+01 2.360000000000000e+00 0.500000000000000e+00 1.000000000000000e-01 0.000000000000000e+00
2.672000000000000e+01 2.240000000000000e+00 0.500000000000000e+00 1.000000000000000e-01 0.000000000000000e+00
3.006000000000000e+01 2.120000000000000e+00 0.500000000000000e+00 1.000000000000000e-01 0.000000000000000e+00
3.340000000000000e+01 2.000000000000000e+00 0.500000000000000e+00 1.000000000000000e-01 0.000000000000000e+00
ED inputs:
3 NumBl - Number of blades (-)
18.5 TipRad - The distance from the rotor apex to the blade tip (meters)
1.5 HubRad - The distance from the rotor apex to the blade root (meters)
0.0000E+00 PreCone(1) - Rotor precone angles (deg)
0.0000E+00 PreCone(2) - Rotor precone angles (deg)
0.0000E+00 PreCone(3) - Rotor precone angles (deg)
0.0000E+00 HubCM - Distance from rotor apex to hub mass (meters)
0.0000E+00 UndSling - Undersling length (meters)
0.0000E+00 Delta3 - Delta-3 angle for teetering rotors (deg)
0.0000E+00 AzimB1Up - Azimuth value to use for I/O when blade 1 points up (degrees)
-3.0000E+00 OverHang - Distance from yaw axis to rotor apex or teeter pin (meters)
1.9120E+00 ShftGagL - Distance from hub or teeter pin to shaft strain gages (meters)
-5.0000E+00 ShftTilt - Rotor shaft tilt angle (deg)
My outfile looks like this:
Time Wind1VelX Wind1VelY Wind1VelZ Azimuth BldPitch1 BldPitch2 BldPitch3 GenSpeed IPDefl1 LSSGagMya LSSGagMza OoPDefl1 PtfmPitch PtfmRoll PtfmSurge PtfmSway RootFxc1 RootFyc1 RootFzc1 RootMxc1 RootMyc1 RootMzc1 RotSpeed RotTorq Spn2MLxb1 Spn2MLyb1 Spn9MLzb3 TTDspTwst TwHt1TPxi TwHt1TPyi TwstDefl1 YawBrFxp YawBrFyp YawBrFzp YawBrMxp YawBrMyp YawBrMzp TipClrnc1 TipClrnc2 TipClrnc3 B1N001FLx B1N002FLx B1N003FLx B1N004FLx B1N005FLx B1N006FLx B1N007FLx B1N008FLx B1N009FLx B1N010FLx B1N011FLx B1N012FLx B1N013FLx B1N014FLx B1N015FLx B1N016FLx B1N017FLx B1N018FLx B1N019FLx B1N020FLx B1N021FLx B1N001FLy B1N002FLy B1N003FLy B1N004FLy B1N005FLy B1N006FLy B1N007FLy B1N008FLy B1N009FLy B1N010FLy B1N011FLy B1N012FLy B1N013FLy B1N014FLy B1N015FLy B1N016FLy B1N017FLy B1N018FLy B1N019FLy B1N020FLy B1N021FLy B1N001FLz B1N002FLz B1N003FLz B1N004FLz B1N005FLz B1N006FLz B1N007FLz B1N008FLz B1N009FLz B1N010FLz B1N011FLz B1N012FLz B1N013FLz B1N014FLz B1N015FLz B1N016FLz B1N017FLz B1N018FLz B1N019FLz B1N020FLz B1N021FLz B1N001MLx B1N002MLx B1N003MLx B1N004MLx B1N005MLx B1N006MLx B1N007MLx B1N008MLx B1N009MLx B1N010MLx B1N011MLx B1N012MLx B1N013MLx B1N014MLx B1N015MLx B1N016MLx B1N017MLx B1N018MLx B1N019MLx B1N020MLx B1N021MLx B1N001MLy B1N002MLy B1N003MLy B1N004MLy B1N005MLy B1N006MLy B1N007MLy B1N008MLy B1N009MLy B1N010MLy B1N011MLy B1N012MLy B1N013MLy B1N014MLy B1N015MLy B1N016MLy B1N017MLy B1N018MLy B1N019MLy B1N020MLy B1N021MLy B1N001MLz B1N002MLz B1N003MLz B1N004MLz B1N005MLz B1N006MLz B1N007MLz B1N008MLz B1N009MLz B1N010MLz B1N011MLz B1N012MLz B1N013MLz B1N014MLz B1N015MLz B1N016MLz B1N017MLz B1N018MLz B1N019MLz B1N020MLz B1N021MLz AB1N001AxInd AB1N002AxInd AB1N003AxInd AB1N004AxInd AB1N005AxInd AB2N001AxInd AB2N002AxInd AB2N003AxInd AB2N004AxInd AB2N005AxInd AB3N001AxInd AB3N002AxInd AB3N003AxInd AB3N004AxInd AB3N005AxInd AB1N001Clrnc AB1N002Clrnc AB1N003Clrnc AB1N004Clrnc AB1N005Clrnc AB2N001Clrnc AB2N002Clrnc AB2N003Clrnc AB2N004Clrnc AB2N005Clrnc AB3N001Clrnc AB3N002Clrnc AB3N003Clrnc AB3N004Clrnc AB3N005Clrnc AB1N001Fx AB1N002Fx AB1N003Fx AB1N004Fx AB1N005Fx AB2N001Fx AB2N002Fx AB2N003Fx AB2N004Fx AB2N005Fx AB3N001Fx AB3N002Fx AB3N003Fx AB3N004Fx AB3N005Fx AB1N001TnInd AB1N002TnInd AB1N003TnInd AB1N004TnInd AB1N005TnInd AB2N001TnInd AB2N002TnInd AB2N003TnInd AB2N004TnInd AB2N005TnInd AB3N001TnInd AB3N002TnInd AB3N003TnInd AB3N004TnInd AB3N005TnInd AB1N001VUndx AB1N002VUndx AB1N003VUndx AB1N004VUndx AB1N005VUndx AB2N001VUndx AB2N002VUndx AB2N003VUndx AB2N004VUndx AB2N005VUndx AB3N001VUndx AB3N002VUndx AB3N003VUndx AB3N004VUndx AB3N005VUndx AB1N001VUndy AB1N002VUndy AB1N003VUndy AB1N004VUndy AB1N005VUndy AB2N001VUndy AB2N002VUndy AB2N003VUndy AB2N004VUndy AB2N005VUndy AB3N001VUndy AB3N002VUndy AB3N003VUndy AB3N004VUndy AB3N005VUndy AB1N001VUndz AB1N002VUndz AB1N003VUndz AB1N004VUndz AB1N005VUndz AB2N001VUndz AB2N002VUndz AB2N003VUndz AB2N004VUndz AB2N005VUndz AB3N001VUndz AB3N002VUndz AB3N003VUndz AB3N004VUndz AB3N005VUndz AB1N001Vindx AB1N002Vindx AB1N003Vindx AB1N004Vindx AB1N005Vindx AB2N001Vindx AB2N002Vindx AB2N003Vindx AB2N004Vindx AB2N005Vindx AB3N001Vindx AB3N002Vindx AB3N003Vindx AB3N004Vindx AB3N005Vindx AB1N001Vindy AB1N002Vindy AB1N003Vindy AB1N004Vindy AB1N005Vindy AB2N001Vindy AB2N002Vindy AB2N003Vindy AB2N004Vindy AB2N005Vindy AB3N001Vindy AB3N002Vindy AB3N003Vindy AB3N004Vindy AB3N005Vindy AB1N001Vx AB1N002Vx AB1N003Vx AB1N004Vx AB1N005Vx AB2N001Vx AB2N002Vx AB2N003Vx AB2N004Vx AB2N005Vx AB3N001Vx AB3N002Vx AB3N003Vx AB3N004Vx AB3N005Vx GenPwr GenTq
(s) (m/s) (m/s) (m/s) (deg) (deg) (deg) (deg) (rpm) (m) (kN-m) (kN-m) (m) (deg) (deg) (m) (m) (kN) (kN) (kN) (kN-m) (kN-m) (kN-m) (rpm) (kN-m) (kN-m) (kN-m) INVALID (deg) INVALID INVALID (deg) (kN) (kN) (kN) (kN-m) (kN-m) (kN-m) (m) (m) (m) (kN) (kN) (kN) (kN) (kN) (kN) (kN) (kN) (kN) (kN) (kN) (kN) (kN) (kN) (kN) (kN) (kN) (kN) (kN) (kN) (kN) (kN) (kN) (kN) (kN) (kN) (kN) (kN) (kN) (kN) (kN) (kN) (kN) (kN) (kN) (kN) (kN) (kN) (kN) (kN) (kN) (kN) (kN) (kN) (kN) (kN) (kN) (kN) (kN) (kN) (kN) (kN) (kN) (kN) (kN) (kN) (kN) (kN) (kN) (kN) (kN) (kN) (kN) (kN-m) (kN-m) (kN-m) (kN-m) (kN-m) (kN-m) (kN-m) (kN-m) (kN-m) (kN-m) (kN-m) (kN-m) (kN-m) (kN-m) (kN-m) (kN-m) (kN-m) (kN-m) (kN-m) (kN-m) (kN-m) (kN-m) (kN-m) (kN-m) (kN-m) (kN-m) (kN-m) (kN-m) (kN-m) (kN-m) (kN-m) (kN-m) (kN-m) (kN-m) (kN-m) (kN-m) (kN-m) (kN-m) (kN-m) (kN-m) (kN-m) (kN-m) (kN-m) (kN-m) (kN-m) (kN-m) (kN-m) (kN-m) (kN-m) (kN-m) (kN-m) (kN-m) (kN-m) (kN-m) (kN-m) (kN-m) (kN-m) (kN-m) (kN-m) (kN-m) (kN-m) (kN-m) (kN-m) (-) (-) (-) (-) (-) (-) (-) (-) (-) (-) (-) (-) (-) (-) (-) (m) (m) (m) (m) (m) (m) (m) (m) (m) (m) (m) (m) (m) (m) (m) (N/m) (N/m) (N/m) (N/m) (N/m) (N/m) (N/m) (N/m) (N/m) (N/m) (N/m) (N/m) (N/m) (N/m) (N/m) (-) (-) (-) (-) (-) (-) (-) (-) (-) (-) (-) (-) (-) (-) (-) (m/s) (m/s) (m/s) (m/s) (m/s) (m/s) (m/s) (m/s) (m/s) (m/s) (m/s) (m/s) (m/s) (m/s) (m/s) (m/s) (m/s) (m/s) (m/s) (m/s) (m/s) (m/s) (m/s) (m/s) (m/s) (m/s) (m/s) (m/s) (m/s) (m/s) (m/s) (m/s) (m/s) (m/s) (m/s) (m/s) (m/s) (m/s) (m/s) (m/s) (m/s) (m/s) (m/s) (m/s) (m/s) (m/s) (m/s) (m/s) (m/s) (m/s) (m/s) (m/s) (m/s) (m/s) (m/s) (m/s) (m/s) (m/s) (m/s) (m/s) (m/s) (m/s) (m/s) (m/s) (m/s) (m/s) (m/s) (m/s) (m/s) (m/s) (m/s) (m/s) (m/s) (m/s) (m/s) (m/s) (m/s) (m/s) (m/s) (m/s) (m/s) (m/s) (m/s) (m/s) (m/s) (m/s) (m/s) (m/s) (m/s) (m/s) (kW) (kN-m)
0.0000 1.250E+01 0.000E+00 0.000E+00 0.000E+00 5.000E+00 5.000E+00 5.000E+00 1.418E+03 0.000E+00 -1.088E+02 -5.871E+00 0.000E+00 0.000E+00 0.000E+00 0.000E+00 0.000E+00 3.561E+00 3.129E-01 6.055E+01 -9.689E-01 7.836E+00 -3.346E-07 2.835E+01 -2.664E-07 6.263E-01 -8.054E-01 0.000E+00 0.000E+00 0.000E+00 0.000E+00 0.000E+00 2.380E+01 3.782E+00 -2.970E+02 2.225E+01 -1.557E+02 -6.193E+00 2.034E+01 1.646E+01 1.646E+01 2.849E+00 2.300E+00 1.701E+00 1.172E+00 7.390E-01 3.895E-01 1.352E-01 -5.127E-02 -1.856E-01 -2.675E-01 -2.946E-01 -2.671E-01 -1.970E-01 -1.187E-01 -5.558E-02 -3.937E-03 3.471E-02 5.771E-02 6.223E-02 4.681E-02 1.703E-02 1.657E+00 1.366E+00 1.054E+00 7.799E-01 5.536E-01 3.586E-01 2.062E-01 1.049E-01 3.564E-02 -1.075E-02 -4.032E-02 -6.984E-02 -8.796E-02 -9.475E-02 -9.305E-02 -8.680E-02 -7.703E-02 -6.401E-02 -4.735E-02 -2.781E-02 -8.845E-03 5.977E+01 5.750E+01 5.408E+01 5.027E+01 4.639E+01 4.246E+01 3.874E+01 3.516E+01 3.144E+01 2.750E+01 2.338E+01 1.922E+01 1.510E+01 1.179E+01 9.510E+00 7.635E+00 5.972E+00 4.438E+00 2.960E+00 1.576E+00 4.638E-01 -3.493E+00 -2.263E+00 -1.285E+00 -5.490E-01 -1.263E-02 3.472E-01 5.341E-01 6.140E-01 6.263E-01 5.982E-01 5.489E-01 5.004E-01 4.344E-01 3.596E-01 2.841E-01 2.124E-01 1.472E-01 9.098E-02 4.635E-02 1.620E-02 1.790E-03 5.490E+00 3.394E+00 1.776E+00 6.247E-01 -1.416E-01 -5.921E-01 -8.183E-01 -8.755E-01 -8.054E-01 -6.470E-01 -4.424E-01 -2.144E-01 -2.679E-02 9.574E-02 1.625E-01 1.833E-01 1.679E-01 1.278E-01 7.667E-02 3.024E-02 3.447E-03 2.480E-08 2.895E-08 9.724E-09 4.033E-09 -5.169E-09 3.340E-09 -3.735E-10 3.207E-10 1.402E-09 1.546E-09 -5.054E-10 -2.208E-10 -6.030E-12 -7.287E-10 2.147E-09 1.682E-10 6.214E-10 3.967E-10 9.549E-12 1.660E-10 5.891E-13 0.000E+00 0.000E+00 0.000E+00 0.000E+00 0.000E+00 0.000E+00 0.000E+00 0.000E+00 0.000E+00 0.000E+00 0.000E+00 0.000E+00 0.000E+00 0.000E+00 0.000E+00 3.408E+00 6.987E+00 1.101E+01 1.515E+01 1.934E+01 2.501E+00 4.922E+00 8.257E+00 1.176E+01 1.533E+01 2.501E+00 4.922E+00 8.257E+00 1.176E+01 1.533E+01 3.110E+01 9.611E+01 1.019E+03 9.390E+02 6.981E+02 3.129E+01 9.553E+01 9.371E+02 8.189E+02 6.266E+02 2.961E+01 8.830E+01 9.090E+02 8.023E+02 6.095E+02 0.000E+00 0.000E+00 0.000E+00 0.000E+00 0.000E+00 0.000E+00 0.000E+00 0.000E+00 0.000E+00 0.000E+00 0.000E+00 0.000E+00 0.000E+00 0.000E+00 0.000E+00 1.041E+01 1.064E+01 1.085E+01 1.105E+01 1.123E+01 1.028E+01 1.015E+01 1.001E+01 9.871E+00 9.718E+00 1.028E+01 1.015E+01 1.001E+01 9.871E+00 9.718E+00 -1.674E-16 -1.711E-16 -1.745E-16 -1.776E-16 -1.806E-16 7.789E-01 7.691E-01 7.588E-01 7.479E-01 7.363E-01 -7.789E-01 -7.691E-01 -7.588E-01 -7.479E-01 -7.363E-01 9.108E-01 9.309E-01 9.494E-01 9.665E-01 9.825E-01 -4.497E-01 -4.440E-01 -4.381E-01 -4.318E-01 -4.251E-01 -4.497E-01 -4.440E-01 -4.381E-01 -4.318E-01 -4.251E-01 0.000E+00 0.000E+00 0.000E+00 0.000E+00 0.000E+00 0.000E+00 0.000E+00 0.000E+00 0.000E+00 0.000E+00 0.000E+00 0.000E+00 0.000E+00 0.000E+00 0.000E+00 0.000E+00 0.000E+00 0.000E+00 0.000E+00 0.000E+00 0.000E+00 0.000E+00 0.000E+00 0.000E+00 0.000E+00 0.000E+00 0.000E+00 0.000E+00 0.000E+00 0.000E+00 1.041E+01 1.064E+01 1.085E+01 1.105E+01 1.123E+01 1.028E+01 1.027E+01 1.011E+01 9.931E+00 9.759E+00 1.028E+01 1.027E+01 1.011E+01 9.931E+00 9.759E+00 6.039E+03 4.309E+01
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0.1500 1.250E+01 0.000E+00 0.000E+00 3.206E+02 4.600E+00 4.600E+00 4.600E+00 -5.413E+03 -3.877E+00 -8.066E+01 -4.467E+02 3.568E+00 0.000E+00 0.000E+00 0.000E+00 0.000E+00 3.113E+02 -1.779E+03 2.144E+03 1.126E+04 1.292E+03 -1.353E+03 -1.518E+02 4.380E+04 2.519E+03 4.299E+02 0.000E+00 0.000E+00 0.000E+00 0.000E+00 0.000E+00 4.274E+01 1.216E+03 -6.102E+02 4.252E+04 1.646E+02 -4.476E+03 1.930E+01 1.785E+01 9.827E+00 1.005E+03 9.549E+02 8.844E+02 8.019E+02 7.133E+02 6.098E+02 4.772E+02 3.564E+02 2.490E+02 1.578E+02 8.500E+01 5.023E+01 2.636E+01 1.086E+01 4.522E-01 -6.400E+00 -9.627E+00 -9.617E+00 -7.807E+00 -4.830E+00 -1.487E+00 -1.457E+03 -1.379E+03 -1.277E+03 -1.168E+03 -1.060E+03 -9.607E+02 -8.863E+02 -8.104E+02 -7.283E+02 -6.386E+02 -5.429E+02 -4.422E+02 -3.435E+02 -2.639E+02 -2.083E+02 -1.627E+02 -1.232E+02 -8.836E+01 -5.672E+01 -2.903E+01 -8.275E+00 2.113E+03 2.033E+03 1.928E+03 1.820E+03 1.715E+03 1.606E+03 1.500E+03 1.392E+03 1.269E+03 1.129E+03 9.737E+02 8.108E+02 6.457E+02 5.110E+02 4.175E+02 3.395E+02 2.694E+02 2.034E+02 1.382E+02 7.503E+01 2.245E+01 9.111E+03 7.979E+03 6.929E+03 5.970E+03 5.100E+03 4.341E+03 3.702E+03 3.091E+03 2.519E+03 1.997E+03 1.539E+03 1.155E+03 8.491E+02 6.156E+02 4.340E+02 2.918E+02 1.828E+02 1.027E+02 4.824E+01 1.647E+01 2.920E+00 5.448E+03 4.642E+03 3.883E+03 3.186E+03 2.560E+03 1.956E+03 1.311E+03 8.065E+02 4.299E+02 1.668E+02 -1.259E+00 -4.734E+01 -6.681E+01 -7.240E+01 -6.612E+01 -5.328E+01 -3.759E+01 -2.275E+01 -1.039E+01 -2.423E+00 8.234E-01 -1.322E+03 -1.244E+03 -1.135E+03 -1.004E+03 -8.606E+02 -7.158E+02 -5.754E+02 -4.455E+02 -3.328E+02 -2.404E+02 -1.681E+02 -1.143E+02 -7.630E+01 -5.150E+01 -3.384E+01 -2.079E+01 -1.166E+01 -5.908E+00 -1.921E+00 1.946E-01 6.270E-01 0.000E+00 0.000E+00 0.000E+00 0.000E+00 0.000E+00 0.000E+00 0.000E+00 0.000E+00 0.000E+00 0.000E+00 0.000E+00 0.000E+00 0.000E+00 0.000E+00 0.000E+00 3.282E+00 6.680E+00 1.046E+01 1.427E+01 1.830E+01 2.928E+00 5.835E+00 9.315E+00 1.292E+01 1.685E+01 2.189E+00 2.924E+00 4.230E+00 6.262E+00 8.944E+00 6.129E+01 4.615E+02 9.808E+03 7.266E+03 -3.598E+03 6.678E+01 5.150E+02 1.076E+04 7.607E+03 -4.693E+03 7.945E+01 5.074E+02 1.078E+04 7.851E+03 -3.541E+03 0.000E+00 0.000E+00 0.000E+00 0.000E+00 0.000E+00 0.000E+00 0.000E+00 0.000E+00 0.000E+00 0.000E+00 0.000E+00 0.000E+00 0.000E+00 0.000E+00 0.000E+00 1.039E+01 1.048E+01 1.023E+01 1.018E+01 1.076E+01 1.033E+01 1.029E+01 9.916E+00 9.733E+00 1.002E+01 1.024E+01 1.003E+01 9.628E+00 9.280E+00 9.231E+00 -5.691E-01 -5.796E-01 -5.900E-01 -5.997E-01 -6.091E-01 8.782E-01 8.794E-01 8.771E-01 8.720E-01 8.658E-01 -3.096E-01 -3.023E-01 -2.950E-01 -2.879E-01 -2.803E-01 6.913E-01 1.677E+00 3.469E+00 4.097E+00 2.934E+00 1.463E-01 1.145E+00 2.874E+00 3.255E+00 1.865E+00 -8.263E-01 1.310E-01 1.790E+00 2.283E+00 1.163E+00 0.000E+00 0.000E+00 0.000E+00 0.000E+00 0.000E+00 0.000E+00 0.000E+00 0.000E+00 0.000E+00 0.000E+00 0.000E+00 0.000E+00 0.000E+00 0.000E+00 0.000E+00 0.000E+00 0.000E+00 0.000E+00 0.000E+00 0.000E+00 0.000E+00 0.000E+00 0.000E+00 0.000E+00 0.000E+00 0.000E+00 0.000E+00 0.000E+00 0.000E+00 0.000E+00 1.023E+01 1.117E+01 1.815E+01 7.689E+00 -6.917E+01 1.022E+01 1.215E+01 2.136E+01 9.419E+00 -7.720E+01 9.735E+00 1.115E+01 1.847E+01 7.860E+00 -6.942E+01 0.000E+00 0.000E+00
I tried running the simulation by increasing the overhang to -5.0 and I get the following error:
FAST_Solution:FAST_AdvanceStates:SolveOption2a_Inp2BD:ED_CalcContStateDeriv:LAPACK_DGETRF: U( 15, 15)=0. Factor U is exactly singular.
Additionally, I get the following for in plane, out of plane deflection of the tip and RPM:
IPDefl1 OoPDefl1 RotSpeed
(m) (m) (rpm)
0.00E+00 0.00E+00 2.84E+01
-1.04E+00 -2.41E-02 -3.95E+00
-3.35E+00 2.89E-01 -7.28E+01
-3.88E+00 3.57E+00 -1.52E+02
-1.33E+00 3.88E+00 -2.03E+02
Dear @James-Ilosta,
Your results are changing very quickly over the first few time steps, which suggest to me that your model is unstable.
Is this an OpenFAST model you generated yourself or are you using one of the NREL-provided examples? For the latter, did you change the model in some way?
Best regards,
