Wind turbine design guideline DG03: yaw and pitch rolling bearing life

Wind & Water Structural Analysis
1

Dear Sandy Butterfield,

For my master’s thesis, I am examining the possibility of using a tower structure with a yaw bearing at the tower base. As part of the evaluation, I therefore want to estimate the dimensions of a roller bearing. I have studied the NREL report “Wind turbine design guideline DG03: yaw and pitch rolling bearing life”. The papers “DG01 Loads analysis” and “DG02 Strength analysis” would be of great help to me as I need to determine the percentage of the different operating conditions and the radial load, axial load and moment load in each of the operating conditions.

2

Dear Jacob,

I’m not familiar with DG02, but I do know that DG01 was never finished, as discussed briefly in the following forum topic: Pitch Bearing Life - #2 by Marshall.Buhl.

Sorry,