IEA Wind TCP Task - NREL
Dec 01, 1998 · metric tons (t) of blade mass. Tower and Monopile Properties The tower and monopile were designed as an isotropic steel tube. Frequency considerations constrained much of the design in that the first tower-monopile mode, 0.17 hertz (Hz), lies between the 1P and 3P blade passing frequencies for all wind speeds. This is also sufficient to avoid ...
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