Calculation model of wind turbine root torque

Wind & Water Rotor Aerodynamics
1

Hello,
I am working on the problem of variable pitch load of wind turbines. I would like to ask you some questions about the blade root load,
1.which parts of RootMzc1 are composed of? Is it the sum of aerodynamic torque, centrifugal torque and gravity torque, and does it include the friction torque of variable rotor bearing?
2.Is it convenient for you to provide the mathematical model of variable paddle load?

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Best regards,
Jiafei.Chang

2

Dear @Jiafei.Chang,

See my post dated Apr 29, 2010 in the following forum topic for an explanation of how the ElastoDyn module of OpenFAST calculates the blade-root momoents, including the pitching moment (via load summation): Tower base axial force discrepancy between FAST and Bladed. Pitch bearing friction is not accounted for.

Best regards,

3

Dear Sir,

Thanks for your reply, I have got the answer.

Best regards,
Jiafei.Chang