An Improved Rigid Multibody Model for the Dynamic Analysis of the Planetary Gearbox in a Wind Turbine

Table 5

Natural frequencies of the gearbox.

Component	Natural frequencies [Hz]
1st planetary stage
Rotational	880.0, 1802.4, 2605.5, 6550.6, 8503.9
Translational (2)	727.3, 1091.5, 1893.2, 2342.6, 7192.8, 10441
Planet	1808.6, 5963.8, 6989.7
2nd planetary stage
Rotational	0, 1696.5, 2014.9, 2663.1, 8064.8, 11952.2
Translational (2)	743.2, 1102.7, 1896.5, 2276.5, 6989.0, 9651.7
Parallel stage
Rotational	660.3, 1081.0, 1464.9, 4171.7
Other	1125.4, 2105.4 (3), 2201.7 (3), 2173.6