2016/09/01 by Fabian Schwack, Matthias Stammler, Gerhard Poll +1 · 1 citation
Engineering · #Gear and Bearing Dynamics Analysis #Tribology and Lubrication Engineering #Mechanical stress and fatigue analysis #Bearing (navigation) #Pitch control #Turbine #Blade pitch #Wind power #Pitch angle #Structural engineering #Mechanical engineering #Computer science #Engineering #Acoustics #Physics #Electrical engineering
paper · pdf · doi:10.1088/1742-6596/753/11/112013
openalex publication_date 2016/09/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/30
The fatigue life calculation of bearings under rotating conditions has been well researched and standardized. In contrast, for bearings in oscillating applications no international standards exist. As a result, pitch bearings in wind turbines are designed with different, non standardized approaches. Furthermore, the impact of individual pitch control on pitch bearings has not yet been studied. In this paper four approaches for fatigue life calculation will be applied and compared under individual pitch control conditions. For comparison, the loads and the bearing geometry of the reference turbine IWT 7.5 MW, which is individual pitch controlled, are used. This paper will show how the bearing life calculated by different approaches reacts to individual pitch control conditions. Furthermore, the factors for the modified rating life, according to the ABMA and ISO standards, which implement different operation conditions on the bearings in rotating applications, are calculated for the given loads and the given bearing geometry in oscillating applications.