Selective excitation of elastic waves in composites

Authors

  • Kirillova E.V. RheinMain University of Applied Sciences, Wiesbaden, Germany
  • Shevtsova M.S. RheinMain University of Applied Sciences, Wiesbaden, Germany

UDC

534.16

DOI:

https://doi.org/10.31429/vestnik-16-2-38-47

Abstract

This study analyzes the effect of various parameters of the piezoelectric transducer on the wave fields generated in the composite plate. A semi-analytical approach based on the application of the Fourier transform, integration by residues and the stationary phase method is used to calculate dispersion curves and wave fields in a wide frequency range. This model allowed us to calculate the displacement fields excited in the anisotropic plate, as well as to distinguish and analyze the contribution of each wave mode to the resulting wave field. The excited fields were calculated and analyzed over a wide frequency range. Another objective of the study was to obtain the information about the shapes and positioning of multiple piezoelectric elements, which facilitate the excitation of directed waves and individual Lamb wave modes. A technique for the selection of parameters and the positioning of piezoelectric actuators required for the wave excitation was developed. It was applied and successfully tested for a combination of several ring-shaped actuators. The relations between the stress amplitudes specified on the surfaces of all actuators from the combination were determined and allowed to suppress certain waves in a multi-layered composite host-structure. It was shown that by varying the voltage applied to the piezoelectric rings, it is possible to suppress or amplify individual waves without changing their size.

Keywords:

Lamb waves, harmonic vibrations, composite quasi-isotropic plate, Green's matrix, Fourier transform, circular actuator, combination of ring piezoelectric actuators, selective excitation of elastic waves

Author Infos

Evgenia V. Kirillova

канд. физ.-мат. наук, профессор Университета прикладных наук г. Висбаден

e-mail: kirillova@web.de

Maria S. Shevtsova

научный сотрудник Университета прикладных наук г. Висбаден

e-mail: mariamarcs@bk.ru

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Issue

2019. Vol. 16. No. 2

Section

Physics

Pages

38-47

Submitted

2019-06-13

Published

2019-06-28

How to Cite

Kirillova E.V., Shevtsova M.S. Selective excitation of elastic waves in composites. Ecological Bulletin of Research Centers of the Black Sea Economic Cooperation, 2019, vol. 16, no. 2, pp. 38-47. DOI: https://doi.org/10.31429/vestnik-16-2-38-47 (In Russian)

Copyright (c) 2019 Kirillova E.V., Shevtsova M.S.

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This work is licensed under a Creative Commons Attribution 4.0 International License.