Özet:

The necessity of solving the problem of increasing the efficiency and reducing the energy intensity of the working process of the vibration machine movement is substantiated. A new principle is proposed for transferring energy from the shape-forming surfaces to the processing medium by implementing highly effective modes and parameters. A constructive scheme and a definite mathematical model of the frame of the vibration machine have been developed, realizing complex spatial oscillations. The oscillations of this shape-forming surface are investigated using the finite element method. The finite element model is composed by approximating all load-bearing elements of the frame with beam end elements. Loads created by pneumatic centrifugal exciters of high-frequency oscillations are determined. The basic waveforms of the shape-forming surfaces that are realized at 18.79 Hz, 18.89 Hz and 19.71 Hz, respectively, are investigated and determined. The distribution of the vibration amplitudes along the perimeter of the frame is estimated at the excitation frequency of 182.5 Hz. The rational values of the amplitude of oscillations for the realization of an effective process of concrete mixture compaction are found. The amplitude of the oscillations is 0.0002...0.0005 m. The obtained vibrations show the presence of the multimode operation of the vibration machine. A definite direction of the purposeful use of one of the forms of natural oscillations is the shape-forming surfaces. The approach for creating high-performance vibration machines of a new generation is proposed. The ideology of implementing such regimes can be successfully applied in road construction for the construction of concrete roads Author Biographies Ivan Nazarenko, Kyiv National University of Construction and Architecture Povitroflotskyi аve., 31, Kyiv, Ukraine, 03037 Doctor of Technical Sciences, Professor, Head of Department Department of machinery and equipment of technological processes

Anahtar Kelimeler: