This notebook implements a fatigue life estimation approach for ball and roller bearings using the ISO 281 approach, adopted for use for bearings in oscillatory applications such as wind and tidal turbine pitch systems according to NREL Wind Turbine Design Guideline 03: Yaw and Pitch Bearing Life.
The program runs assuming loading calculations have already been carried out either via simulation or from sensor readings on the turbine. An excel file for each load case must be created and hava an associated duty cycle.
Blade root forces and bending moments (Fxy, Fz, My) Pitch angle displacement Timesteps
- Load the loading data
- Create brg_design object using design parameters
- Create load_case_comb object - to combine load cases from each tidal profile
- Create tidal_profile_comb object - to combine all tidal profiles with duty cycle information
- Create life_calcs object to get pitch system bearing lifetime estimation
Where users can help Who maintains and contributes
MIT License
Copyright (c) 2019 Fraser Ewing
Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:
The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.
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