Hello
Rencently I do some research about drivetrain of wind turbine, I use the Robert G. Parker’s lump-mass model.When I use the parameter of 550KW gearbox to verify the model, I find result of the lump-mass model(2.9Hz,6.19Hz,21.3Hz) is so different from the results(40.75Hz,69.49Hz) given by the NREL.
The lump-mass model is based on
-Analytical Characterization of the Unique Properties of Planetary Gear Free Vibration
The parameter of 550KW gearbox is from the two material
-Dynamic modeling and analysis of a spur planetary gear involving tooth wedging and bearing clearance nonlinearity
-Dynamic Analysis of Wind Turbine Planetary Gears Using an Extended Harmonic Balance Approach
NREL have the 750KW and 1.5MW parameter and the result of natural frequency?
Thank you!
Yin