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The National Academy of Sciences of Ukraine

The Institute of Electrodynamics

About Institute



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