DOI: https://doi.org/10.15407/publishing2018.51.125

CALCULATION OF PARAMETERS OF A PULSE ELECTRODYNAMIC OSCILLATOR TO EXCITE OF ELASTIC WAVES

A.D. Horodzha, K.A. Horodzha, B.O. Troshchynskyi, O.A. Pogrebnyi
Kyiv National University of Construction and Architecture,
Povitroflotskyi, 31, Kyiv-37, 03037, Ukraine,
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The possibility of using pulsed electrodynamic and induction-dynamic oscillators for the excitation of wave processes in a concrete structure for diagnosis of its states based on the echo-method is considered. A simplified method for calculating the functional dependence in time of the electromagnetic force when connecting such a converter to a pre-charged capacitor battery is described. The paper takes into account the nonuniform distribution of current density over the cross section of the conductors, and also uses the approximation of a relatively small change in the moving part distance during the discharge current flow, which allows us to consider a discharge circuit with constant electrical parameters. The conditions for obtaining the maximum value of the force are determined for a given geometrical dimensions of the oscillator. References 6, figures 3.
Key words: pulsed electrodynamic oscillator, discharge current, electromagnetic force, mechanical wave processes, diagnostics of concrete structures.

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Received 10.10.2018

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