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It is known that, under appropriate condition, amplitude of vibration of some blades in mistuned bladed disk system become large compared to what would be predicted by an analysis of the perfectly tuned system. In this paper, the effects of the mistuning pattern on the natural frequencies and the frequency response of mistuned bladed disk system are investigated. It is shown that, in the tuned system, the excitation with the wavenumber k excites only the vibration modes with the same wavenumberdoi:10.1299/kikaic.78.12 fatcat:37rh3nnysbhnnaxavvlagjp4mq