TY  - BOOK
AU  - Christie,Robert J.
ED  - National Aeronautics and Space Administration
ED  - United States Department of Energy
TI  - Vibration analysis of three guyed tower designs for intermediate size wind turbines / 
T2  - DOE/NASA
PY  - 1982///
CY  - Cleveland : 
PB  - National Aeronautics and Space Administration, 
KW  - ENERGIA EOLICA
KW  - TURBINAS EOLICAS
KW  - PRODUCCION DE ENERGIA
KW  - CONVERSION DE ENERGIA
KW  - DISEÑO DE TORRES
N1  - Informe/número de patente NASA CR-165589; DOE/NASA/1900-1; Three guyed tower designs were analyzed for intermediate size wind turbines. The four lowest natural frequencies of vibration of the three towers concepts were estimated. A parametric study was performed on each tower to determine the effect of varying such tower properties as the inertia and stiffness of the tower and guys, the inertia values of the nacelle and rotor, and the rotational speed of the rotor. Only the two lowest frequencies were in a range where they could be excited by the rotor blade passing frequencies. There two frequencies could be tuned by varying the guy stiffness, the guy attachment point on the tower, the tower and mass stiffness, and the nacelle/rotor/power train masses
UR  - https://ntrs.nasa.gov/citations/19820022833
ER  -