The problem of determining the maximum forced response vibration amplification that can be produced just by the addition of a small mistuning to a perfectly cyclical bladed disk still remains not completely clear. In this paper we apply a recently introduced perturbation methodology, the asymptotic mistuning model (AMM), to determine which are the key ingredients of this amplification process and to evaluate the maximum mistuning amplification factor that a given modal family with a particular distribution of tuned frequencies can exhibit. A more accurate upper bound for the maximum forced response amplification of a mistuned bladed disk is obtained from this description, and the results of the AMM are validated numerically using a simple mass-spring model.
Asymptotic Description of Maximum Mistuning Amplification of Bladed Disk Forced Response
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Martel, C., and Corral, R. (December 23, 2008). "Asymptotic Description of Maximum Mistuning Amplification of Bladed Disk Forced Response." ASME. J. Eng. Gas Turbines Power. March 2009; 131(2): 022506. https://doi.org/10.1115/1.2968868
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