Statistical analysis of fatigue loads in a direct drive wind turbine

• In order to assess the fatigue life of drive train components, we seek to determinehow the component damage index can be estimated, not only in terms of itsexpected value, but also its distribution due to a turbulent wind field introducingrandomness. For assessing the fatigue life of main shaft bearings it was foundthat:• A quasi-static drive train model may be sufficient for a direct drive concept innormal operation• The average and variability of the damage index rate varies substantially withthe mean wind speed• The variability of the estimated total component damage index should beconsidered when estimating the total damage

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TEKNIK OCH TEKNOLOGIER  -- Maskinteknik -- Teknisk mekanik (hsv//swe)

ENGINEERING AND TECHNOLOGY  -- Mechanical Engineering -- Applied Mechanics (hsv//eng)

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