Abstract
Vibrations and waves are investigated in periodic systems that consist of identical subsystems having an arbitrary structure. Spectral regularities are found for such systems. Their dispersion curves are shown to consist of branches, each of which corresponds to its own mode shape of elastic vibrations of the subsystem. The presence of band gaps in such systems, in which a harmonic signal cannot be transmitted, was revealed, and their boundaries were determined. The mode shapes of vibrations in various frequency ranges are obtained. Modulated waves are shown to arise in the system due to modulation by lower frequencies, which correspond to system vibrations without taking into account the elastic properties of the constituent subsystems.
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This study was supported by the Russian Science Foundation, project no. 21-19-00813.
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Translated by M. Shmatikov
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Banakh, L.Y., Pavlov, I.S. Vibrations of Periodic Systems Consisting of Identical Subsystems of an Arbitrary Structure. J. Mach. Manuf. Reliab. 52, 293–300 (2023). https://doi.org/10.3103/S1052618823040052
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DOI: https://doi.org/10.3103/S1052618823040052