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Energies 2012, 5(11), 4350-4371; doi:10.3390/en5114350
Article

Time Domain Modeling and Analysis of Dynamic Gear Contact Force in a Wind Turbine Gearbox with Respect to Fatigue Assessment

1,* , 1
 and 1,2
1 Centre for Ships and Ocean Structures (CeSOS), Norwegian University of Science and Technology (NTNU), Otto Nielsens V.10, N-7491, Trondheim, Norway 2 Department of Marine Technology, Norwegian University of Science and Technology (NTNU), Otto Nielsens V.10, N-7491, Trondheim, Norway
* Author to whom correspondence should be addressed.
Received: 26 August 2012 / Revised: 23 October 2012 / Accepted: 23 October 2012 / Published: 1 November 2012
(This article belongs to the Special Issue Wind Turbines)
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Abstract

The gearbox is one of the most expensive components of the wind turbine system. In order to refine the design and hence increase the long-term reliability, there has been increasing interest in utilizing time domain simulations in the prediction of gearbox design loads. In this study, three problems in time domain based gear contact fatigue analysis under dynamic conditions are discussed: (1) the torque reversal problem under low wind speed conditions, (2) statistical uncertainty effects due to time domain simulations and (3) simplified long term contact fatigue analysis of the gear tooth under dynamic conditions. Several recommendations to deal with these issues are proposed based on analyses of the National Renewable Energy Laboratory’s 750 kW land-based Gearbox Reliability Collaborative wind turbine.
Keywords: gearbox; time-domain; contact fatigue; reversal rotation; statistical uncertainty gearbox; time-domain; contact fatigue; reversal rotation; statistical uncertainty
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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MDPI and ACS Style

Dong, W.; Xing, Y.; Moan, T. Time Domain Modeling and Analysis of Dynamic Gear Contact Force in a Wind Turbine Gearbox with Respect to Fatigue Assessment. Energies 2012, 5, 4350-4371.

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