Moordyn Issue during fastfarm sim

Open tomblanks1 opened this issue 3 months ago • 1 comments

Hi, I am trying to run a fastfarm case for 10 turbines approximatly 1000m away from each other in an array, my setup works and moordyn initialzes fine but blows up at 24 seconds into a 600s simulation. this is the first issue i ran into but by making SkewMod = 0 and UAMod 0 i got past this ( obvs not ideal at all)

after this not i have this issue at the same time and then a crash

ill upload my moordyn file below if that helps anyone understand the issue

MoorDyn v2 Input File Generated by MoorPy ---------------------- LINE TYPES -------------------------------------------------- TypeName Diam Mass/m EA BA/-zeta EI Cd Ca CdAx CaAx (name) (m) (kg/m) (N) (N-s/-) (N-m^2) (-) (-) (-) (-) 0_0 0.1402 21.20 2.896e+07 -1.000e+00 0.000e+00 2.0 0.8 0.40 0.25
0_1 0.1402 21.20 2.896e+07 -1.000e+00 0.000e+00 2.0 0.8 0.40 0.25
1_0 0.1797 34.85 4.761e+07 -1.000e+00 0.000e+00 2.0 0.8 0.40 0.25
--------------------- ROD TYPES ----------------------------------------------------- TypeName Diam Mass/m Cd Ca CdEnd CaEnd (name) (m) (kg/m) (-) (-) (-) (-) ----------------------- BODIES ------------------------------------------------------ ID Attachment X0 Y0 Z0 r0 p0 y0 Mass CG* I* Volume CdA* Ca* (#) (-) (m) (m) (m) (deg) (deg) (deg) (kg) (m) (kg-m^2) (m^3) (m^2) (-) ---------------------- RODS --------------------------------------------------------- ID RodType Attachment Xa Ya Za Xb Yb Zb NumSegs RodOutputs (#) (name) (#/key) (m) (m) (m) (m) (m) (m) (-) (-) ---------------------- POINTS ------------------------------------------------------- ID Attachment X Y Z Mass Volume CdA Ca (#) (-) (m) (m) (m) (kg) (m^3) (m^2) (-) 1 Turbine2 -7.50 -7.50 -21.00 0.00 0.00 0.00 0.00 2 Turbine2 -7.50 7.50 -21.00 0.00 0.00 0.00 0.00 3 Free -2390.90 -3200.92 -40.25 0.00 0.00 0.00 0.00 4 Free -2444.10 -3200.89 -65.07 80000.00 0.00 0.00 0.00 5 Free -3838.85 -3200.07 -68.17 80000.00 0.00 0.00 0.00 6 Turbine1 7.50 7.50 -21.00 0.00 0.00 0.00 0.00 7 Turbine1 7.50 -7.50 -21.00 0.00 0.00 0.00 0.00 8 Free -3892.13 -3200.04 -43.54 0.00 0.00 0.00 0.00 9 Turbine3 7.50 -7.50 -21.00 0.00 0.00 0.00 0.00 10 Turbine3 -7.50 -7.50 -21.00 0.00 0.00 0.00 0.00 11 Free -2343.31 -1651.81 -43.41 0.00 0.00 0.00 0.00 12 Free -2343.17 -1704.60 -68.81 80000.00 0.00 0.00 0.00 13 Free -2339.32 -3096.34 -67.08 80000.00 0.00 0.00 0.00 14 Turbine2 -7.50 7.50 -21.00 0.00 0.00 0.00 0.00 15 Turbine2 7.50 7.50 -21.00 0.00 0.00 0.00 0.00 16 Free -2339.18 -3149.09 -41.57 0.00 0.00 0.00 0.00 17 Turbine4 -7.50 -7.50 -21.00 0.00 0.00 0.00 0.00 18 Turbine4 -7.50 7.50 -21.00 0.00 0.00 0.00 0.00 19 Free -789.82 -1600.91 -40.36 0.00 0.00 0.00 0.00 20 Free -842.93 -1600.86 -65.32 80000.00 0.00 0.00 0.00 21 Free -2237.11 -1599.50 -68.44 80000.00 0.00 0.00 0.00 22 Turbine3 7.50 7.50 -21.00 0.00 0.00 0.00 0.00 23 Turbine3 7.50 -7.50 -21.00 0.00 0.00 0.00 0.00 24 Free -2290.30 -1599.45 -43.67 0.00 0.00 0.00 0.00 25 Turbine5 7.50 -7.50 -21.00 0.00 0.00 0.00 0.00 26 Turbine5 -7.50 -7.50 -21.00 0.00 0.00 0.00 0.00 27 Free -743.26 -51.81 -43.41 0.00 0.00 0.00 0.00 28 Free -743.08 -104.61 -68.81 80000.00 0.00 0.00 0.00 29 Free -738.36 -1496.35 -67.08 80000.00 0.00 0.00 0.00 30 Turbine4 -7.50 7.50 -21.00 0.00 0.00 0.00 0.00 31 Turbine4 7.50 7.50 -21.00 0.00 0.00 0.00 0.00 32 Free -738.18 -1549.10 -41.57 0.00 0.00 0.00 0.00 33 Turbine6 -7.50 -7.50 -21.00 0.00 0.00 0.00 0.00 34 Turbine6 -7.50 7.50 -21.00 0.00 0.00 0.00 0.00 35 Free 810.19 -0.92 -40.36 0.00 0.00 0.00 0.00 36 Free 757.08 -0.86 -65.32 80000.00 0.00 0.00 0.00 37 Free -637.08 0.50 -68.44 80000.00 0.00 0.00 0.00 38 Turbine5 7.50 7.50 -21.00 0.00 0.00 0.00 0.00 39 Turbine5 7.50 -7.50 -21.00 0.00 0.00 0.00 0.00 40 Free -690.27 0.55 -43.68 0.00 0.00 0.00 0.00 41 Turbine7 7.50 -7.50 -21.00 0.00 0.00 0.00 0.00 42 Turbine7 -7.50 -7.50 -21.00 0.00 0.00 0.00 0.00 43 Free 856.72 1548.18 -43.41 0.00 0.00 0.00 0.00 44 Free 856.90 1495.39 -68.81 80000.00 0.00 0.00 0.00 45 Free 861.66 103.65 -67.08 80000.00 0.00 0.00 0.00 46 Turbine6 -7.50 7.50 -21.00 0.00 0.00 0.00 0.00 47 Turbine6 7.50 7.50 -21.00 0.00 0.00 0.00 0.00 48 Free 861.84 50.90 -41.57 0.00 0.00 0.00 0.00 49 Turbine8 -7.50 -7.50 -21.00 0.00 0.00 0.00 0.00 50 Turbine8 -7.50 7.50 -21.00 0.00 0.00 0.00 0.00 51 Free 2410.15 1599.09 -40.37 0.00 0.00 0.00 0.00 52 Free 2357.04 1599.14 -65.33 80000.00 0.00 0.00 0.00 53 Free 962.90 1600.50 -68.45 80000.00 0.00 0.00 0.00 54 Turbine7 7.50 7.50 -21.00 0.00 0.00 0.00 0.00 55 Turbine7 7.50 -7.50 -21.00 0.00 0.00 0.00 0.00 56 Free 909.71 1600.55 -43.68 0.00 0.00 0.00 0.00 57 Turbine9 7.50 -7.50 -21.00 0.00 0.00 0.00 0.00 58 Turbine9 -7.50 -7.50 -21.00 0.00 0.00 0.00 0.00 59 Free 2455.81 3148.19 -43.39 0.00 0.00 0.00 0.00 60 Free 2456.02 3095.40 -68.79 80000.00 0.00 0.00 0.00 61 Free 2461.56 1703.65 -67.07 80000.00 0.00 0.00 0.00 62 Turbine8 -7.50 7.50 -21.00 0.00 0.00 0.00 0.00 63 Turbine8 7.50 7.50 -21.00 0.00 0.00 0.00 0.00 64 Free 2461.77 1650.91 -41.57 0.00 0.00 0.00 0.00 65 Turbine10 -7.50 -7.50 -21.00 0.00 0.00 0.00 0.00 66 Turbine10 -7.50 7.50 -21.00 0.00 0.00 0.00 0.00 67 Free 4007.49 3200.02 -40.68 0.00 0.00 0.00 0.00 68 Free 3954.57 3200.04 -65.94 80000.00 0.00 0.00 0.00 69 Free 2561.64 3200.57 -68.99 80000.00 0.00 0.00 0.00 70 Turbine9 7.50 7.50 -21.00 0.00 0.00 0.00 0.00 71 Turbine9 7.50 -7.50 -21.00 0.00 0.00 0.00 0.00 72 Free 2508.63 3200.58 -43.92 0.00 0.00 0.00 0.00 73 Fixed -4000.00 -4800.00 -600.00 0.00 0.00 0.00 0.00 74 Turbine1 7.50 -7.50 -21.00 0.00 0.00 0.00 0.00 75 Turbine1 -7.50 -7.50 -21.00 0.00 0.00 0.00 0.00 76 Free -3946.31 -3251.71 -39.74 0.00 0.00 0.00 0.00 77 Fixed -5600.00 -3200.00 -600.00 0.00 0.00 0.00 0.00 78 Turbine1 -7.50 -7.50 -21.00 0.00 0.00 0.00 0.00 79 Turbine1 -7.50 7.50 -21.00 0.00 0.00 0.00 0.00 80 Free -3997.47 -3200.02 -38.08 0.00 0.00 0.00 0.00 81 Fixed -4000.00 -1600.00 -600.00 0.00 0.00 0.00 0.00 82 Turbine1 -7.50 7.50 -21.00 0.00 0.00 0.00 0.00 83 Turbine1 7.50 7.50 -21.00 0.00 0.00 0.00 0.00 84 Free -3946.30 -3148.33 -39.74 0.00 0.00 0.00 0.00 85 Fixed -2400.00 -4800.00 -600.00 0.00 0.00 0.00 0.00 86 Turbine2 7.50 -7.50 -21.00 0.00 0.00 0.00 0.00 87 Turbine2 -7.50 -7.50 -21.00 0.00 0.00 0.00 0.00 88 Free -2340.65 -3252.87 -37.84 0.00 0.00 0.00 0.00 89 Fixed -800.00 -3200.00 -600.00 0.00 0.00 0.00 0.00 90 Turbine2 7.50 7.50 -21.00 0.00 0.00 0.00 0.00 91 Turbine2 7.50 -7.50 -21.00 0.00 0.00 0.00 0.00 92 Free -2290.65 -3201.72 -44.66 0.00 0.00 0.00 0.00 93 Fixed -4000.00 -1600.00 -600.00 0.00 0.00 0.00 0.00 94 Turbine3 -7.50 -7.50 -21.00 0.00 0.00 0.00 0.00 95 Turbine3 -7.50 7.50 -21.00 0.00 0.00 0.00 0.00 96 Free -2395.61 -1599.84 -38.07 0.00 0.00 0.00 0.00 97 Fixed -2400.00 0.00 -600.00 0.00 0.00 0.00 0.00 98 Turbine3 -7.50 7.50 -21.00 0.00 0.00 0.00 0.00 99 Turbine3 7.50 7.50 -21.00 0.00 0.00 0.00 0.00 100 Free -2344.69 -1547.96 -39.73 0.00 0.00 0.00 0.00 101 Fixed -800.00 -3200.00 -600.00 0.00 0.00 0.00 0.00 102 Turbine4 7.50 -7.50 -21.00 0.00 0.00 0.00 0.00 103 Turbine4 -7.50 -7.50 -21.00 0.00 0.00 0.00 0.00 104 Free -739.65 -1652.87 -37.83 0.00 0.00 0.00 0.00 105 Fixed 800.00 -1600.00 -600.00 0.00 0.00 0.00 0.00 106 Turbine4 7.50 7.50 -21.00 0.00 0.00 0.00 0.00 107 Turbine4 7.50 -7.50 -21.00 0.00 0.00 0.00 0.00 108 Free -689.77 -1601.74 -44.87 0.00 0.00 0.00 0.00 109 Fixed -2400.00 0.00 -600.00 0.00 0.00 0.00 0.00 110 Turbine5 -7.50 -7.50 -21.00 0.00 0.00 0.00 0.00 111 Turbine5 -7.50 7.50 -21.00 0.00 0.00 0.00 0.00 112 Free -795.58 0.15 -38.07 0.00 0.00 0.00 0.00 113 Fixed -800.00 1600.00 -600.00 0.00 0.00 0.00 0.00 114 Turbine5 -7.50 7.50 -21.00 0.00 0.00 0.00 0.00 115 Turbine5 7.50 7.50 -21.00 0.00 0.00 0.00 0.00 116 Free -744.67 52.04 -39.73 0.00 0.00 0.00 0.00 117 Fixed 800.00 -1600.00 -600.00 0.00 0.00 0.00 0.00 118 Turbine6 7.50 -7.50 -21.00 0.00 0.00 0.00 0.00 119 Turbine6 -7.50 -7.50 -21.00 0.00 0.00 0.00 0.00 120 Free 860.36 -52.87 -37.83 0.00 0.00 0.00 0.00 121 Fixed 2400.00 0.00 -600.00 0.00 0.00 0.00 0.00 122 Turbine6 7.50 7.50 -21.00 0.00 0.00 0.00 0.00 123 Turbine6 7.50 -7.50 -21.00 0.00 0.00 0.00 0.00 124 Free 910.24 -1.74 -44.87 0.00 0.00 0.00 0.00 125 Fixed -800.00 1600.00 -600.00 0.00 0.00 0.00 0.00 126 Turbine7 -7.50 -7.50 -21.00 0.00 0.00 0.00 0.00 127 Turbine7 -7.50 7.50 -21.00 0.00 0.00 0.00 0.00 128 Free 804.41 1600.15 -38.07 0.00 0.00 0.00 0.00 129 Fixed 800.00 3200.00 -600.00 0.00 0.00 0.00 0.00 130 Turbine7 -7.50 7.50 -21.00 0.00 0.00 0.00 0.00 131 Turbine7 7.50 7.50 -21.00 0.00 0.00 0.00 0.00 132 Free 855.32 1652.04 -39.73 0.00 0.00 0.00 0.00 133 Fixed 2400.00 0.00 -600.00 0.00 0.00 0.00 0.00 134 Turbine8 7.50 -7.50 -21.00 0.00 0.00 0.00 0.00 135 Turbine8 -7.50 -7.50 -21.00 0.00 0.00 0.00 0.00 136 Free 2460.32 1547.13 -37.83 0.00 0.00 0.00 0.00 137 Fixed 4000.00 1600.00 -600.00 0.00 0.00 0.00 0.00 138 Turbine8 7.50 7.50 -21.00 0.00 0.00 0.00 0.00 139 Turbine8 7.50 -7.50 -21.00 0.00 0.00 0.00 0.00 140 Free 2510.20 1598.27 -44.86 0.00 0.00 0.00 0.00 141 Fixed 800.00 3200.00 -600.00 0.00 0.00 0.00 0.00 142 Turbine9 -7.50 -7.50 -21.00 0.00 0.00 0.00 0.00 143 Turbine9 -7.50 7.50 -21.00 0.00 0.00 0.00 0.00 144 Free 2403.49 3200.16 -38.07 0.00 0.00 0.00 0.00 145 Fixed 2400.00 4800.00 -600.00 0.00 0.00 0.00 0.00 146 Turbine9 -7.50 7.50 -21.00 0.00 0.00 0.00 0.00 147 Turbine9 7.50 7.50 -21.00 0.00 0.00 0.00 0.00 148 Free 2454.40 3252.05 -39.71 0.00 0.00 0.00 0.00 149 Fixed 4000.00 1600.00 -600.00 0.00 0.00 0.00 0.00 150 Turbine10 7.50 -7.50 -21.00 0.00 0.00 0.00 0.00 151 Turbine10 -7.50 -7.50 -21.00 0.00 0.00 0.00 0.00 152 Free 4057.92 3148.32 -37.90 0.00 0.00 0.00 0.00 153 Fixed 5600.00 3200.00 -600.00 0.00 0.00 0.00 0.00 154 Turbine10 7.50 7.50 -21.00 0.00 0.00 0.00 0.00 155 Turbine10 7.50 -7.50 -21.00 0.00 0.00 0.00 0.00 156 Free 4107.76 3200.01 -44.35 0.00 0.00 0.00 0.00 157 Fixed 4000.00 4800.00 -600.00 0.00 0.00 0.00 0.00 158 Turbine10 -7.50 7.50 -21.00 0.00 0.00 0.00 0.00 159 Turbine10 7.50 7.50 -21.00 0.00 0.00 0.00 0.00 160 Free 4057.93 3251.70 -37.90 0.00 0.00 0.00 0.00 ---------------------- LINES -------------------------------------------------------- ID LineType AttachA AttachB UnstrLen NumSegs LineOutputs (#) (name) (#) (#) (m) (-) (-) 1 0_1 3 1 48.548 3 - 2 0_1 3 2 48.548 3 - 3 0_1 3 4 55.000 3 - 4 0_0 4 5 1314.590 20 - 5 0_1 8 6 48.548 3 - 6 0_1 8 7 48.548 3 - 7 0_1 5 8 55.000 3 - 8 0_1 11 9 48.548 3 - 9 0_1 11 10 48.548 3 - 10 0_1 11 12 55.000 3 - 11 0_0 12 13 1314.590 20 - 12 0_1 16 14 48.548 3 - 13 0_1 16 15 48.548 3 - 14 0_1 13 16 55.000 3 - 15 0_1 19 17 48.548 3 - 16 0_1 19 18 48.548 3 - 17 0_1 19 20 55.000 3 - 18 0_0 20 21 1314.590 20 - 19 0_1 24 22 48.548 3 - 20 0_1 24 23 48.548 3 - 21 0_1 21 24 55.000 3 - 22 0_1 27 25 48.548 3 - 23 0_1 27 26 48.548 3 - 24 0_1 27 28 55.000 3 - 25 0_0 28 29 1314.590 20 - 26 0_1 32 30 48.548 3 - 27 0_1 32 31 48.548 3 - 28 0_1 29 32 55.000 3 - 29 0_1 35 33 48.548 3 - 30 0_1 35 34 48.548 3 - 31 0_1 35 36 55.000 3 - 32 0_0 36 37 1314.590 20 - 33 0_1 40 38 48.548 3 - 34 0_1 40 39 48.548 3 - 35 0_1 37 40 55.000 3 - 36 0_1 43 41 48.548 3 - 37 0_1 43 42 48.548 3 - 38 0_1 43 44 55.000 3 - 39 0_0 44 45 1314.590 20 - 40 0_1 48 46 48.548 3 - 41 0_1 48 47 48.548 3 - 42 0_1 45 48 55.000 3 - 43 0_1 51 49 48.548 3 - 44 0_1 51 50 48.548 3 - 45 0_1 51 52 55.000 3 - 46 0_0 52 53 1314.590 20 - 47 0_1 56 54 48.548 3 - 48 0_1 56 55 48.548 3 - 49 0_1 53 56 55.000 3 - 50 0_1 59 57 48.548 3 - 51 0_1 59 58 48.548 3 - 52 0_1 59 60 55.000 3 - 53 0_0 60 61 1314.590 20 - 54 0_1 64 62 48.548 3 - 55 0_1 64 63 48.548 3 - 56 0_1 61 64 55.000 3 - 57 0_1 67 65 48.548 3 - 58 0_1 67 66 48.548 3 - 59 0_1 67 68 55.000 3 - 60 0_0 68 69 1314.590 20 - 61 0_1 72 70 48.548 3 - 62 0_1 72 71 48.548 3 - 63 0_1 69 72 55.000 3 - 64 1_0 76 74 47.352 3 - 65 1_0 76 75 47.352 3 - 66 1_0 73 76 1587.061 20 - 67 1_0 80 78 47.352 3 - 68 1_0 80 79 47.352 3 - 69 1_0 77 80 1587.061 20 - 70 1_0 84 82 47.352 3 - 71 1_0 84 83 47.352 3 - 72 1_0 81 84 1587.061 20 - 73 1_0 88 86 47.352 3 - 74 1_0 88 87 47.352 3 - 75 1_0 85 88 1587.061 20 - 76 1_0 92 90 47.352 3 - 77 1_0 92 91 47.352 3 - 78 1_0 89 92 1587.061 20 - 79 1_0 96 94 47.352 3 - 80 1_0 96 95 47.352 3 - 81 1_0 93 96 1587.061 20 - 82 1_0 100 98 47.352 3 - 83 1_0 100 99 47.352 3 - 84 1_0 97 100 1587.061 20 - 85 1_0 104 102 47.352 3 - 86 1_0 104 103 47.352 3 - 87 1_0 101 104 1587.061 20 - 88 1_0 108 106 47.352 3 - 89 1_0 108 107 47.352 3 - 90 1_0 105 108 1587.061 20 - 91 1_0 112 110 47.352 3 - 92 1_0 112 111 47.352 3 - 93 1_0 109 112 1587.061 20 - 94 1_0 116 114 47.352 3 - 95 1_0 116 115 47.352 3 - 96 1_0 113 116 1587.061 20 - 97 1_0 120 118 47.352 3 - 98 1_0 120 119 47.352 3 - 99 1_0 117 120 1587.061 20 - 100 1_0 124 122 47.352 3 - 101 1_0 124 123 47.352 3 - 102 1_0 121 124 1587.061 20 - 103 1_0 128 126 47.352 3 - 104 1_0 128 127 47.352 3 - 105 1_0 125 128 1587.061 20 - 106 1_0 132 130 47.352 3 - 107 1_0 132 131 47.352 3 - 108 1_0 129 132 1587.061 20 - 109 1_0 136 134 47.352 3 - 110 1_0 136 135 47.352 3 - 111 1_0 133 136 1587.061 20 - 112 1_0 140 138 47.352 3 - 113 1_0 140 139 47.352 3 - 114 1_0 137 140 1587.061 20 - 115 1_0 144 142 47.352 3 - 116 1_0 144 143 47.352 3 - 117 1_0 141 144 1587.061 20 - 118 1_0 148 146 47.352 3 - 119 1_0 148 147 47.352 3 - 120 1_0 145 148 1587.061 20 - 121 1_0 152 150 47.352 3 - 122 1_0 152 151 47.352 3 - 123 1_0 149 152 1587.061 20 - 124 1_0 156 154 47.352 3 - 125 1_0 156 155 47.352 3 - 126 1_0 153 156 1587.061 20 - 127 1_0 160 158 47.352 3 - 128 1_0 160 159 47.352 3 - 129 1_0 157 160 1587.061 20 - ---------------------- OPTIONS ------------------------------------------------------ 0.0001 dtM - time step to use in mooring integration (s) 600.0 WtrDpth - water depth (m) <<< must be specified for farm-level mooring 3.0e+06 kbot - bottom stiffness (Pa/m) 3.0e+05 cbot - bottom damping (Pa-s/m) 2.0 dtIC - time interval for analyzing convergence during IC gen (s) 200.0 TmaxIC - max time for ic gen (s) 4.0 CdScaleIC - factor by which to scale drag coefficients during dynamic relaxation (-) 0.02 threshIC - threshold for IC convergence (-) 0.01 dtOut - Output time step (-) ----------------------- OUTPUTS -----------------------------------------------------

Nov 25 '25 18:11 tomblanks1

Dear @tomblanks1,

I haven't reviewed your MoorDyn input file, but for such a complicated FAST.Farm model with 10 turbines and shared moorings, I would first try to isolate the issue, i.e., figure out if the MoorDyn set-up is actually the issue or the issue is with your OpenFAST model set-up or FAST.Farm model set-up. To determine that, I would simplify the model to debug. E.g., does your FAST.Farm model give the expected results if you only have a single turbine? For the 10-turbine case, do your OpenFAST models and MoorDyn model respond as expected if you disable all platform DOFs in all OpenFAST models, which would isolate MoorDyn from the rest of the solve?

Best regards,

Nov 26 '25 15:11 jjonkman