TY - GEN
T1 - CONSIDERATION ON THE BENEFITS OF INTENTIONAL BLADE MISTUNING FOR THE FORCED RESPONSE OF TURBOMACHINERY ROTORS
AU - Castanier, Matthew P.
AU - Pierre, Christophe
N1 - Publisher Copyright:
© 1997 American Society of Mechanical Engineers (ASME). All rights reserved.
PY - 1997
Y1 - 1997
N2 - The intentional mistuning of blades in order to reduce the forced response amplitudes of turbomachinery rotors is considered. The statistics of the maximum blade response amplitudes for a simple model of a 12-bladed disk are investigated. It is shown that the maximum response amplitudes are appropriately modeled by a Type III Weibull distribution. Intentional mistuning is introduced into the model by varying the nominal blade stiffnesses in rotationally periodic patterns. Of the six non-zero harmonics, the first and second harmonics are shown to provide a significant decrease in the meiximum amplitudes. A more practical, pseudo-harmonic-two configuration of mistuning is also considered. This pattern requires only two unique blade designs, and it results in an even larger decrease in the meiximum response than that provided by the harmonic-two intentional mistuning.
AB - The intentional mistuning of blades in order to reduce the forced response amplitudes of turbomachinery rotors is considered. The statistics of the maximum blade response amplitudes for a simple model of a 12-bladed disk are investigated. It is shown that the maximum response amplitudes are appropriately modeled by a Type III Weibull distribution. Intentional mistuning is introduced into the model by varying the nominal blade stiffnesses in rotationally periodic patterns. Of the six non-zero harmonics, the first and second harmonics are shown to provide a significant decrease in the meiximum amplitudes. A more practical, pseudo-harmonic-two configuration of mistuning is also considered. This pattern requires only two unique blade designs, and it results in an even larger decrease in the meiximum response than that provided by the harmonic-two intentional mistuning.
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U2 - 10.1115/IMECE1997-0741
DO - 10.1115/IMECE1997-0741
M3 - Conference contribution
AN - SCOPUS:85042308186
T3 - ASME International Mechanical Engineering Congress and Exposition, Proceedings (IMECE)
SP - 419
EP - 425
BT - Analysis and Design Issues for Modern Aerospace Vehicles
T2 - ASME 1997 International Mechanical Engineering Congress and Exposition, IMECE 1997 - Analysis and Design Issues for Modern Aerospace Vehicles
Y2 - 16 November 1997 through 21 November 1997
ER -