Abstract
The dynamics of wind turbine planetary gears with gravity effects are investigated using an extended harmonic balance method that extends established harmonic balance formulations to include simultaneous internal and external excitations. The extended harmonic balance method with arc-length continuation and Floquet theory is applied to a lumped-parameter planetary gear model including gravity,fluctuating mesh stiffness, bearing clearance, and nonlinear tooth contact to obtain the planetary gear dynamic response. The calculated responses compare well with time domain integrated mathematical models and experimental results. Gravity is a fundamental vibration source in wind turbine planetary gears and plays an important role in system dynamics, causing hardening effects induced by toothwedging and bearing-raceway contacts. Bearing clearance significantly reduces the lowest resonant frequencies of translational modes. Gravity and bearing clearance together lowers the speed at which tooth wedging occurs lower than the resonant frequency.
| Original language | American English |
|---|---|
| Number of pages | 18 |
| State | Published - 2012 |
| Event | International Conference on Noise and Vibration Engineering - Leuven, Belgium Duration: 17 Sep 2012 → 19 Sep 2012 |
Conference
| Conference | International Conference on Noise and Vibration Engineering |
|---|---|
| City | Leuven, Belgium |
| Period | 17/09/12 → 19/09/12 |
NREL Publication Number
- NREL/CP-5000-55355
Keywords
- gearboxes
- reliability
- wind turbine