This paper is the first in a two-part study of identifying mistuning in bladed disks. It develops a new method of mistuning identification based on measurements of the vibratory response of the system as a whole. As a system-based method, this approach is particularly suited to integrally bladed rotors, whose blades cannot be removed for individual measurements. The method is based on a recently developed reduced order model of mistuning called the fundamental mistuning model (FMM) and is applicable to isolated families of modes. Two versions of FMM system identification are presented: a basic version that requires some prior knowledge of the system’s properties, and a somewhat more complex version that determines the mistuning completely from experimental data.
Mistuning Identification of Bladed Disks Using a Fundamental Mistuning Model—Part I: Theory
Contributed by the International Gas Turbine Institute and presented at the International Gas Turbine and Aeroengine Congress and Exhibition, Atlanta, GA, June 16—19, 2003. Manuscript received by the IGTI Dec. 2002; final revision Mar. 2003. Paper No. 2003-GT-38952. Review Chair: H. R. Simmons.
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Feiner , D. M., and Griffin, J. H. (March 26, 2004). "Mistuning Identification of Bladed Disks Using a Fundamental Mistuning Model—Part I: Theory ." ASME. J. Turbomach. January 2004; 126(1): 150–158. https://doi.org/10.1115/1.1643913
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