The GRC is an international consortium of wind turbine gearbox researchers, designers, and engineers seeking to improve the reliability of wind turbine drivetrains through testing, modelling and analysis. While at NREL, I led this consortium though dynamometer and field testing of two heavily instrumented, 750 kW gearboxes [1]. We developed multibody numerical simulations of the drivetrains and determined the level of modeling complexity necessary to identify cyclical loading behaviors observed in the planetary stage of these gearboxes [2]. We also analyzed new testing methodologies and developed theoretical models to explain non-torque loading within the planetary stage [3,4].

  1. Link, H., LaCava, W., van Dam, J., McNiff, B., Sheng, S., Wallen, R., … & Oyague, F. (2011). Gearbox reliability collaborative project report: findings from phase 1 and phase 2 testing (No. NREL/TP-5000-51885). National Renewable Energy Laboratory (NREL), Golden, CO. link

  2. La Cava, W., Guo, Y., Marks, C., Xing, Y. and Moan, T. (2013). “Three-dimensional bearing load share behaviour in the planetary stage of a wind turbine gearbox.” IET Renewable Power Generation 7 (4): 359–69. doi:10.1049/iet-rpg.2012.0274. preprint

  3. Guo, Y., Keller, J., & LaCava, W. (2015). Planetary gear load sharing of wind turbine drivetrains subjected to non‐torque loads. Wind Energy, 18(4), 757-768. link

  4. LaCava, W., Keller, J., & McNiff, B. (2012, April). Gearbox reliability collaborative: test and model investigation of sun orbit and planet load share in a wind turbine gearbox. AIAA SDM, National Renewable Energy Laboratory, NREL/CP-5000-54618. link