Modal testing in the design evaluation of wind turbines

Technical Report · Fri Apr 01 00:00:00 EST 1988

OSTI ID:5014768

Lauffer, J P; Carne, T G; Ashwill, T D

This report reviews several techniques of low-frequency excitation used successfully to measure modal parameters for wind turbines, including impact, wind, step-relaxation, and human input. As one application of these techniques, a prototype turbine was tested and two modal frequencies were found to be close to integral multiples of the operating speed, which caused a resonant condition. The design was modified to shift these frequencies, and the turbine was retested to confirm expected changes in modal frequencies.

• Research Organization: Sandia National Labs., Albuquerque, NM (USA)
• DOE Contract Number: AC04-76DP00789
• OSTI ID: 5014768
• Report Number(s): SAND-87-2461; ON: DE88010374
• Country of Publication: United States
• Language: English

Related Subjects

17 WIND ENERGY
WIND TURBINES
TESTING
DESIGN
DYNAMIC LOADS
EVALUATION
IMPACT TESTS
OPERATION
WIND LOADS
MACHINERY
MATERIALS TESTING
MECHANICAL TESTS
TURBINES
TURBOMACHINERY
170602* - Wind Energy Engineering- Turbine Design & Operation