METHODOLOGY FOR EXPERIMENTAL RESEARCH ON THE DISTRIBUTION OF ENERGY IN THE ELEMENTS OF THE «VIBRATION MACHINE – COMPACTING CONCRETE MIXTURE» SYSTEM

The paper presents a methodology for experimental research on the distribution of energy in the elements of a vibra-tion machine for compacting concrete mixtures. The development of this methodology is based on a thorough analy-sis of existing research methods and the determination of energies in mechanical systems and media. Within the general system of the "vibration machine – compacting concrete mixture," the following subsystems were identified: bearings of the vibration exciter, supports, vibration dampers, reactive and active masses, including the form mass and the compacting concrete mixture. Specific research methods for energy dissipation were determined for each of the mentioned subsystems, preceding relevant modeling. Energy dissipation depends on many factors: the composi-tion and structure of the material, cyclic deformation and stresses arising from the medium’s exposure, the type and parameters of the load, the duration of cyclic deformation, and more. The evaluation criterion for energy dissipa-tion in media is the energy absorption coefficient, which expresses the ratio of energy used to perform the techno-logical process of compaction to the potential energy. The ratio of these energies is considered an independent material characteristic, determined experimentally, taking into account actual technological and operational fac-tors. It was found that the following main methods are used to evaluate energy parameters: phase, damping oscilla-tions, hysteresis loops, energy, and resonance methods. The paper substantiates the methodology for experimental research of parameters and energy indicators of concrete mixture compaction processes. Two models—discrete and continuous—were used in the simulation of these processes.