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Wind Turbine Technology: Fundamental Concepts in Wind Turbine Engineering, Second Edition

David A. Spera, Ph.D.
David A. Spera, Ph.D.
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ASME Press
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Wind turbine structures present many difficult fatigue design problems because they are (1) relatively slender and flexible, (2) subject to vibration and resonance, (3) acted upon by loads which are often non-deterministic, (4) operated continuously in all types of weather with a minimum of maintenance, and (5) constantly competing with other energy sources on the basis of life-cycle costs. Progress in the development of modern wind turbines has been paced by progress in our understanding of fatigue loads, modeling of structural-dynamic responses to unsteady winds, and the designing of innovative structural elements to reduce these responses.

In this chapter we...

Structural Design Drivers
Fatigue Load and Stress Spectra
Statistical Analysis of Examples of Fatigue Load Spectra
Fatigue Load Spectra from HAWT Tests
Empirical Equations for Fatigue Load Spectra
Fatigue Design Procedures
Fatigue Testing of Wind Turbine Blades
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