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NEES Project Warehouse

A Seismic Study of Wind Turbines for Renewable Energy
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Complete - 05/25/2011

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NEG Micon 53.6m Ambient Vibration Without Soil Accelerometers
Experiment Type: Field
Description: Following Experiments 1 and 2, a third series of tests was conducted during March 24-27, 2009. Additional ambient vibration testing was conducted on the same 900 kW NEG Micon 53.6m high wind turbine of Experiments 1 and 2 (no soil surface accelerometers were deployed in this series of tests). The experiment was conducted at Oak Creek Energy Systems near Mojave, California using the NEES@UCLA mobile testing field laboratory. Accelerometers were installed at stations in the turbine tower, and on the foundation. Acceleration response was recorded simultaneously, including vertical, side-to-side, and fore-aft motion components at each fixed station. For the parked situation, sources of excitation are limited to the wind and vibration transmitted through the ground. In contrast, when the turbine is operating, harmonic narrow band vibration is transmitted throughout the structure from the periodic spinning of the rotor and other rotating components. These dynamic field tests are the first to be presented for such a highly instrumented modern Horizontal Axis Wind Turbine (HAWT). Therefore, this test series provides a unique opportunity to determine the dynamic properties of the turbine under in-situ conditions for both parked and operating conditions.
Dates: March 24, 2009 - March 27, 2009
Facility: University of California, Los Angeles, CA, United States
Equipment:
Specimen Type: Wind Turbine
Material: Component 1 Component 1 (view)
Sensors: Kinemetrics Accelerometers
Drawings:
Data:
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