Sources of fatigue damage to passive yaw wind turbine blades
- Univ. of Utah, Salt Lake City, UT (United States)
Using an integrated computer analysis approach developed at the University of Utah, fatigue damage sources to passive yaw wind turbine blades have been investigated. Models of a rigid hub and teetering hub machine reveal the parameters important to the fatigue design of each type. The teetering hub proved much less susceptible to fatigue damage from normal operation loads. As a result, extreme events were critical to the teetering hub fatigue life. The rigid hub blades experienced extremely large gyroscopic load cycles induced by rapid yaw rates during normal operation. These yaw rates stem from turbulence activity which is shown to be dependent upon atmospheric stability. Investigation revealed that increasing yaw damping is an effective way of significantly reducing these gyroscopic fatigue loads.
- Research Organization:
- American Wind Energy Association, Washington, DC (United States)
- OSTI ID:
- 570064
- Report Number(s):
- CONF-970608-PROC.; ON: DE98001975; TRN: 98:001071-0036
- Resource Relation:
- Conference: WindPower `97: annual conference and exhibition of the American Wind Energy Association (AWEA), Austin, TX (United States), 15-18 Jun 1997; Other Information: PBD: [1997]; Related Information: Is Part Of Proceedings: American Wind Energy Association; PB: 636 p.
- Country of Publication:
- United States
- Language:
- English
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