Free vibrations of the ERDA-NASA 100 kW wind turbineThe ERDA-NASA wind turbine (windmill), which consists of a 93-foot truss tower, a bed plate that supports mechanical and electrical equipment, and two 62.5-foot long blades, was analyzed to determine its free vibrations using NASTRAN. The finite element representation of the system consisted of beam and plate elements. The free vibrations of the tower alone, the blades alone, and the complete system were determined experimentally in the field. These results were obtained by instrumenting the tower or blades with an accelerometer and impacting the components with an instrumented mass. The predicted results for natural frequencies and mode shapes were in excellent agreement with measured data.
Document ID
19760045061
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Chamis, C. C. (NASA Lewis Research Center Cleveland, OH, United States)
Sullivan, T. L. (NASA Lewis Research Center Cleveland, Ohio, United States)