Dynamic Analysis of Wind Turbine Planetary Gears Using an Extended Harmonic Balance Approach: Preprint

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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 ... continued below

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18 p.

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Guo, Y.; Keller, J. & Parker, R. G. June 1, 2012.

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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 tooth wedging 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.

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18 p.

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  • To be presented at International Conference on Noise and Vibration Engineering, 17-19 September 2012, Leuven, Belgium

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  • Report No.: NREL/CP-5000-55355
  • Grant Number: AC36-08GO28308
  • Office of Scientific & Technical Information Report Number: 1044460
  • Archival Resource Key: ark:/67531/metadc832464

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  • June 1, 2012

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  • May 19, 2016, 9:45 a.m.

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  • April 4, 2017, 12:44 p.m.

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Guo, Y.; Keller, J. & Parker, R. G. Dynamic Analysis of Wind Turbine Planetary Gears Using an Extended Harmonic Balance Approach: Preprint, article, June 1, 2012; Golden, Colorado. (digital.library.unt.edu/ark:/67531/metadc832464/: accessed November 20, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.