Method for determining blade mistuning on integrally...

Details Method for determining blade mistuning on integrally... Method for determining blade mistuning on integrally...

G - Physics

01

M

G01M 7/08 (2006.01) G01M 15/14 (2006.01) F01D 5/02 (2006.01)

Patent

CA 2627788

For determining production-inherent mistuning of integrally manufactured rotor wheels (blisks) on the basis of the identification of blade natural frequencies, the individual blades are excited independently of each other and the vibratory response is measured for the calculation of the respective blade natural frequency and of mistuning. During measurement the blades not under investigation are additionally mistuned by temporarily applying an identical extra mass to each of them, such that coupling effects disturbing the measurement of the vibratory response of the excited blade are shifted away from the natural frequency-near range of the blades and hence eliminated.

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