Engineering Mechanics

International Conference

Proceedings Vol. 27/28 (2022)


May 9 – 12, 2022, Milovy, Czech Republic
Editors: Cyril Fischer and Jiří Náprstek

Copyright © 2022 Institute of Theoretical and Applied Mechanics of the Czech Academy of Sciences, Prague

ISBN 978-80-86246-48-2 (printed)
ISBN 978-80-86246-51-2 (electronic)
ISSN 1805-8248 (printed)
ISSN 1805-8256 (electronic)

list of papers scientific commitee

Calculated investigation of the beam vibrations with local surface damage
Onyshchenko Ye., Zinkovskii A., Matveev V.
pages 293 - 296, full text

The paper presents the procedure for calculating the vibration characteristics of the beam structural element with a breathing crack. The beam of a rectangular cross-section with a triangular breathing crack is an object of investigation. From the proposed calculation procedure, the vibrodiagnostic parameters of the presence of a crack are obtained, namely, relative variation of the vibration frequency and ratios between the amplitudes of dominant harmonics under principal, super- and subharmonic resonances at different sizes of the crack. The ratio between the amplitudes of dominant displacement harmonics under subharmonic resonance is efficiently used as a factor of the presence of a breathing crack.

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All papers were reviewed by members of the scientific committee.

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