Simulation Analysis of Main Bearing Vibration Characteristics of Wind Turbine

The operating condition of the main bearing of the wind turbine directly affects the stability of the whole wind turbine, and it is crucial to analyze the vibration characteristics of the main bearing. In this paper, not only the theoretical analysis of the main bearing’s inherent frequency was carried out, but also the vibration characteristics under different constraints are studied by the finite element analysis method, and the first six orders of inherent frequency and vibration pattern of the bearing are listed, and it is found that the deformation is mainly concentrated in the axial direction. Further, the axial vibration simulation experiments of the constrained radial direction were carried out, and the maximum deformation in the axial direction was obtained as 24.9% of the thickness of the main bearing. It provides a theoretical basis for the selection of sensor parameters (range and signal sampling frequency) for further main bearing operation condition monitoring.