Dynamic Modelling of Slip in a Wind Turbine Spherical Roller Main Bearing

Elisha de Mello, Edward Hart, Yi Guo, Jonathan Keller, Rob Dwyer-Joyce, Ampea Boateng

Research output: Contribution to journalArticlepeer-review

1 Scopus Citations


This paper considers the problem of the dynamic modelling of macro slip in spherical roller bearings. By revisiting the fundamental physics which drive these systems, potential issues in existing models have been identified. Furthermore, in pure rolling conditions it was found that governing differential equations become “stiff”, requiring the use of implicit methods of time integration. The problem of individual roller macro slip in a wind turbine main bearing is then investigated using a simplified representation of system dynamics. Model results indicate clear links between slip/friction and the operational strategy of the wind turbine, as well as significantly higher frictional effects in the downwind main bearing row. Due to modelling simplifications, these results should not yet be considered conclusive, with further work required.

Original languageAmerican English
Pages (from-to)297-307
Number of pages11
JournalForschung im Ingenieurwesen/Engineering Research
Issue number1
StatePublished - Mar 2023

Bibliographical note

Publisher Copyright:
© 2023, The Author(s), under exclusive licence to Der/die Autor(en), exklusiv lizenziert an Springer-Verlag GmbH Deutschland, ein Teil von Springer Nature.

NREL Publication Number

  • NREL/JA-5000-84793


  • dynamics
  • main bearing
  • roller bearing
  • slip
  • wind turbine


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