Wyniki 1-2 spośród 2 dla zapytania: authorDesc:"Oleksandr V. KOBYLIANSKYI"

Simulation and development of energy-efficient vibration machines operating in resonant modes DOI:10.15199/48.2019.04.11

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Energy saving is very important in developing new technologies and industrial equipment. The existing technologies and industrial equipment do not comply sufficiently with modern requirements concerning energy saving. One of the methods for solving the problems associated with energy saving is the development of vibration machines rated for operation in resonant vibration modes. Resonance vibration machines are widely used in the mining industry, the building-and-construction industry, and other industries. It is reasonably to use resonance vibration machines in processes where the vibration machine actuator acts directly on the material being processed. Such processes include processes for transporting, sorting, mixing, and compacting materials. Effective operation of resonance vibration machines is possible if the elasticity and dissipation properties of the vibration machine-medium system are accounted for, because such properties have a direct effect on the operational mode of the vibration machine. The further development of resonance vibration machines will be based on the combination of elastic and dissipative forces acting in the vibration machine-medium system. For this reason, it is necessary to use new methods for simulating, studying, and designing such systems. Analysis of study results and publications One of the basic problems concerning vibration machines consists in developing and validating their mathematical models. Paper [1] contains information on simulating vibrations in complex systems with indefinite nonlinearities, which are often spatially localized. Studied in this paper is the method, based on inverse optimization, for simulating dynamic nonlinearities in locally nonlinear systems. Studied in the paper [2] are the factors that cause changes in the dynamic response of a system consisting of two plates connected by a single fastening element. Notwithstanding the fact that paper [2] does not rela[...]

Method of design calculation of a hydropulse device for strain hardening of materials DOI:10.15199/48.2019.04.12

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Strengthening of details by superficial plastic deformation, In particular, vibration damping treatment is devoted to quite a large number of works, however, in most cases, these works are devoted to processing technologies or investigation of the received surface layer [ ], and there are no work on the development of methods for design calculations of devices for deformation strengthening of materials practical [1-4]. Therefore, the development of a method for design calculation of the original design hydropulse device [5,6] is an actual scientific and engineering task. Method of design calculation of a hydropulse device for deformation strengthening of materials It is based on the results of theoretical experiments on hydropulse drives and devices of various technical and technological purposes [1 - 3]. During the design calculations of the hydropulse drives and devices on their basis, the content and composition of the basic initial data is determined, in the first place, the purpose of the drive or the device, the required range of adjustment of operating parameters of the executive, such as, for example, the frequency of passage of pressure pulses generated by the pulse pressure generator (PPG) actuator or device, and the amplitude of the vibration of the actuator, the "opening" pressure of the PPG and the maximum inertial mass of the actuator of the actuator or device. The described general initial data required for the design calculation of the hydropulse devices (or drives) for strainreinforcing materials may be supplemented by additional data for specific circuitry and design features of the device. Materials and research results The method of a specific design calculation of a hydropulse device for strain hardening of materials will be considered for a device whose structural and calculation scheme is shown in Figure 1 [7]. The peculiarity of this device is that its power, elastic and distributive links are co[...]

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