Vibration characteristics of a large wind turbine tower on non-rigid foundations
Vibration characteristics of the Mod-OA wind turbine supported by non-rigid foundations were investigated for a range of soil rigidities. The study shows that the influence of foundation rotation on the fundamental frequency of the wind turbine is quite significant for cohesive soils or loose sand. The reduction in natural frequency can be greater than 20 percent. However, for a foundation resting on well graded, dense granular materials or bedrock, such effect is small and the foundation can be treated as a fixed base.
- Research Organization:
- National Aeronautics and Space Administration, Cleveland, OH (USA). Lewis Research Center
- DOE Contract Number:
- EX-76-A-29-1004
- OSTI ID:
- 7105683
- Report Number(s):
- ERDA/NASA/1004-77/1; NASA-TM-X-73670
- Country of Publication:
- United States
- Language:
- English
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