TY - GEN
T1 - Stability of a pretwisted blade with rotating speed
AU - Yang, Shih-Ming
AU - Tsao, S. M.
PY - 1992/1/1
Y1 - 1992/1/1
N2 - An analytical model is presented to investigate the vibration and stability of a pretwisted blade under nonconstant rotating speed. Two coupled bending displacements in flapwise and edgewise directions are considered. The time-dependent rotating speed leads to nonautonomous systems in which parametric resonance can occur. Six parametric instabilities, including primary and combination resonances, are predicted by using multiple scale method. These instability predictions are compared with those from numerical results of a more detail model. Among all instabilities, the combination resonance when perturbed frequency near twice of the fundamental frequency is found to be most critical and sensitive to system parameters.
AB - An analytical model is presented to investigate the vibration and stability of a pretwisted blade under nonconstant rotating speed. Two coupled bending displacements in flapwise and edgewise directions are considered. The time-dependent rotating speed leads to nonautonomous systems in which parametric resonance can occur. Six parametric instabilities, including primary and combination resonances, are predicted by using multiple scale method. These instability predictions are compared with those from numerical results of a more detail model. Among all instabilities, the combination resonance when perturbed frequency near twice of the fundamental frequency is found to be most critical and sensitive to system parameters.
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U2 - 10.1115/92GT168
DO - 10.1115/92GT168
M3 - Conference contribution
AN - SCOPUS:84925935871
T3 - ASME 1992 International Gas Turbine and Aeroengine Congress and Exposition, GT 1992
BT - Manufacturing Materials and Metallurgy; Ceramics; Structures and Dynamics; Controls, Diagnostics and Instrumentation; Education
PB - American Society of Mechanical Engineers
T2 - ASME 1992 International Gas Turbine and Aeroengine Congress and Exposition, GT 1992
Y2 - 1 June 1992 through 4 June 1992
ER -