Abstract
We study the influence of the nature of the circumferential distribution of the blade frequencies on the localization of the vibrations of shrouded blade rings. It is shown that the most favorable configuration (with regard to both the level of the vibratory stresses and the scatter of the resonant amplitudes of the vibrations) for the shrouded blade rings with mistuning of the blade frequencies is the “sawtooth” arrangement of the frequencies around the circumference of the disk, while the most unfavorable configuration is the arrangement with two or three neighboring blades with the same or similar frequencies. We propose a technique for studying the localized vibrations of the subject systems, making it possible to significantly simplify the solution of the problem.
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