Determination of energy parameters of vibrating machines for compaction and formation of concrete products according to different power form of load

Authors

DOI:

https://doi.org/10.32347/2410-2547.2024.113.18-28

Keywords:

discrete-continuous model, two-seat vibration unit, vibration shock unit, compaction, mixture, energy, resonance, parameters, amplitude, oscillation frequency

Abstract

The paper investigates and determines the parameters and energy indicators of vibrating machines with harmonic and vibroshock modes of motion for compaction of concrete mixtures. The equations of motion of the vibration system "working body of the machine - compaction medium" are made on the basis of a hybrid discrete-continuum model, which adequately describes the real process of compaction of the mixture. Calculations were made on the basis of the obtained analytical dependencies to determine the amplitudes of oscillations and the oscillation energy of a two-seater The systems made it possible to assess their changes in different modes of operation. Thus, the first resonance was recorded at a frequency of 5 Hz, and the second at a frequency of 35 Hz. For the action of an external force on the first mass, the resonance mode is determined by the parameters of the second mass, including the energy dissipation coefficient and the ratio between these masses. The conditions for the influence of dissipation in the resonance mode at a frequency close to the partial natural frequency of the mass on which the external force acts have been determined. The energy parameters of the vibrating percussion system have been investigated and determined. The equations of motion of a vibro-percussion installation as a model with discrete-continuous parameters are given and solved.

Amplitude and skeletal characteristics are given, the influence of parameters on their change is determined, and two ways of implementing the resonance mode are revealed: by changing the frequency of the harmonic force, and at the same time, the possibilities of controlling the movement of the installation by changing the frequency and the value of compression of the limiter by a constant force are determined. Formulas for determining the energy parameters of a vibro-percussion installation, which take into account the discrete parameters of the machine and the distributed parameters of the concrete mixture, have been obtained.

Author Biographies

Ivan Nazarenko, Kyiv National University of Construction and Architecture

Doctor of Technical Sciences, Professor, Professor of the Department of Machines and Equipment of Technological Processes

Andrii Zapryvoda, Kyiv National University of Construction and Architecture

Candidate of Technical Sciences, Head of the Department "Automation of Technological Processes"

Andrii Bondarenko, Odesa State Academy of Civil Engineering and Architecture

Candidate of Technical Sciences, Associate Professor, Head of the Department of Mechanical Engineering

Volodymyr Slyusar, Kyiv National University of Construction and Architecture

Assistant of the Department of Machines and Equipment of Technological Processes

References

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Published

2024-11-29

Issue

No. 113 (2024)

Section

Статті

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