Hello,
Sorry to disturb you guys. But, I am really confused with how to calculate the fatigue life of a wind turbine. Follow the IEC guidance, I know that I need to select DLCs from all design situations. So I just simply write down the steps that I think for calculating the fatigue life.
- Use TurbSim to generate wind file, from mean wind speed 4m/s to 24 m/s, and then determine the relative significant wave height and peak spectral period. ( Is it essential to use different Randseeds for each mean wind speed and is there any recommend simulation-length for each simulation?)
- Import the wind data in the FAST to get the loads and bending moments.
- Use MLife to calculate the fatigue life. ( Actually, I do not know which output from FAST can be used as input file for MLife for normal operation state or in idling state.
Could you give me some advice please? Thanks a lot!
Kind Regards
Junyi. Wu