Design Evaluation of Wind Turbine Spline Couplings Using an Analytical Model: Preprint

Yi Guo, Jonathan Keller, Robert Wallen, Robert Errichello, Christopher Halse, Scott Lambert

Research output: Contribution to conferencePaper


Articulated splines are commonly used in the planetary stage of wind turbine gearboxes for transmitting the driving torque and improving load sharing. Direct measurement of spline loads and performance is extremely challenging because of limited accessibility. This paper presents an analytical model for the analysis of articulated spline coupling designs. For a given torque and shaftmisalignment, this analytical model quickly yields insights into relationships between the spline design parameters and resulting loads; bending, contact, and shear stresses; and safety factors considering various heat treatment methods. Comparisons of this analytical model against previously published computational approaches are also presented.
Original languageAmerican English
Number of pages12
StatePublished - 2015
EventConference for Wind Power Drives - Aachen, Germany
Duration: 3 Mar 20154 Mar 2015


ConferenceConference for Wind Power Drives
CityAachen, Germany

NREL Publication Number

  • NREL/CP-5000-63507


  • analytical models
  • articulated spline coupling
  • NREL
  • spline loads
  • wind turbine gearbox


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