TY - JOUR
T1 - Consideration on the benefits of intentional blade mistuning for the forced response of turbomachinery rotors
AU - Castanier, Matthew P.
AU - Pierre, Christophe
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 maximum amplitudes. A more practical, pseudoharmonic-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 maximum 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 maximum amplitudes. A more practical, pseudoharmonic-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 maximum response than that provided by the harmonic-two intentional mistuning.
UR - http://www.scopus.com/inward/record.url?scp=0031362542&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=0031362542&partnerID=8YFLogxK
M3 - Article
AN - SCOPUS:0031362542
SN - 0733-4230
VL - 55
SP - 419
EP - 425
JO - American Society of Mechanical Engineers, Aerospace Division (Publication) AD
JF - American Society of Mechanical Engineers, Aerospace Division (Publication) AD
ER -