1992 Volume 35 Issue 2 Pages 268-273
Vibration spectra of the experimental 15m wind turbine of the Mechanical Engineering Laboratory were obtained in field operation to clarify the vibration characteristics of general teetered-rotor wind turbines. To investigate the causes of steady vibration, step response tests were also conducted, where excitations were made with the disk brake located at the high-speed shaft. As a result, a Campbell diagram for the system has been established. The tower-bending resonance with one-per-rev and two-per-rev excitations of the rotor, as well as the transmission-torsion resonance with two-per-rev excitation, has been observed. It has also been found that the one-per-rev gravitational force is predominant for the blade chordwise bending and that various n-per-rev components due to wind speed variation can be seen on the blade flapwise bending.
JSME international journal. Ser. 1, Solid mechanics, strength of materials
JSME international journal. Ser. A, Mechanics and material engineering
JSME International Journal Series C Mechanical Systems, Machine Elements and Manufacturing
JSME International Journal Series B Fluids and Thermal Engineering
JSME International Journal Series A Solid Mechanics and Material Engineering
JSME international journal. Ser. C, Dynamics, control, robotics, design and manufacturing