Issue №: 2(121)
The journal deals with the problems of vibration technologies and machines, mathematical methods of vibration process studies, information on design and technological development, presents teaching and methodological aspects of teaching in the Higher School of Applied Sciences, where vibration machines and technologies are studied.
THEORETICAL STUDY OF THE EFFECT OF SOIL PROPERTIES IN THE ROW SPACES OF SUGAR BEET CROPS ON THE PERFORMANCE OF THE FIELD SURFACE COPYING PROCESS IN HOP-HARVESTING MACHINES MACHINE
Pohorilyi Serhiy – Doctor of Technical Sciences, Senior Research Fellow, Deputy Director for Research at the Institute of Mechanics and Automation of Agro-Industrial Production of the National Academy of Agrarian Sciences of Ukraine (11/1 Vokzalna St., Hlevakha Village, Fastiv District, Kyiv Region, 08631; e-mail: pogorilyy_sergiy@ukr.net)
Ihnatiev Yevhen – PhD, Senior Lecturer at the Department of Operation and Technical Service of Machines, (66 Universitetskaya St., Zaporizhzhia, Zaporizhzhia Oblast, 69011, Ukraine; email: yevhen.ihnatiev@tsatu.edu.ua)
Jüri Olt – Doctor of Technical Sciences, Professor, Professor of the Chair of Biosystems Engineering, Estonian University of Life Sciences (F. R. Kreutzwaldi tn 1a, 51006 Tartu, Estonia, e-mail: jyri.olt@emu.ee)
The influence of soil elastic-damping properties on the technological quality of the working process of a front-mounted beet tops harvester equipped with a rotary cutting device is investigated. The problem is considered from the standpoint of stable field-surface copying by support-copying wheels, because vertical and angular oscillations of the frame change the position of the working body, cause deviations in cutting height, increase beet tops losses and reduce the uniformity of root-head cleaning. The calculation scheme is refined by representing the contact “support-copying wheel – soil” as an equivalent Kelvin-Voigt viscoelastic link with soil stiffness and damping parameters. Based on Lagrange equations of the second kind, a mathematical model of coupled oscillations is formulated. The generalized coordinates are the angular displacement of the machine frame and the vertical displacement of the support-copying wheel axle. Numerical calculations are performed for Black soil and the results are compared with the limiting case of a rigid soil base. The amplitude values in the graphical dependences are recalculated for half of the irregularity height h0 = 0.02 m, which provides a twofold reduction in amplitude compared with the basic calculation set. It is established that increasing the machine moment of inertia from 30 to 60 kg·m 2 at a forward speed of 1.0 m·s–1 decreases the amplitude of vertical oscillations of the working body from approximately 89.9 to 49.1 mm. Reducing the distance between the hitch point and the axle of the support-copying wheels is the most effective design measure for decreasing the amplitude. It is shown that finite stiffness and damping of the soil moderately but essentially change the amplitude-frequency and phase-frequency characteristics, especially in the upper part of the operating speed range. The results are used to substantiate recommendations for improving the technological quality of the working process by taking into account the soil state, the arrangement of support-copying wheels and the parameters of the speed mode.
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About the journal
The journal "Vibrations in Engineering and Technologies" is included in the list of technical scientific publications of Ukraine
(Category "B", Order of the Ministry of Education and Science of Ukraine dated July 2, 2020 No. 886)
Old version of the site: http://vibrojournal.vsau.edu.ua/
The journal "Vibrations in Engineering and Technology" is indexed by the following databases and catalogs:
The certificateof massmedia State registration:kv no 16643-5115 from 30.04.2010 .
Founder of the journal: Vinnytsia National Agrarian University
The journal is devoted to highlighting current issues in engineering, mechanical engineering, and technological processes, including the study of dynamic and oscillatory phenomena in technical systems, the application of mathematical methods for process modeling and analysis, as well as the presentation of results of design-engineering and technological developments. Particular attention is given to the study of vibration processes and their application in modern technologies.
The purpose of the scientific journal “Vibrations in Engineering and Technologies” is to disseminate the results of fundamental and applied research in the field of engineering sciences aimed at developing theoretical foundations and practical approaches to the design, analysis, and improvement of machines, materials, and technological processes, including the use of vibration and oscillatory effects in various sectors of production.
The publication is focused on the formation of a modern scientific and informational environment for the effective exchange of research results, support of innovative development, and implementation of advanced technical solutions in industry, agro-industrial production, and related fields.
The journal promotes the development of interdisciplinary research, the integration of modern engineering approaches, and the enhancement of the efficiency of technological processes and technical systems, including through the rational use of vibration phenomena.
Objectives of the Scientific Journal
To achieve its stated purpose, the journal addresses the following key objectives:
dissemination of results of fundamental and applied scientific research in the fields of mechanics, mechanical engineering, technological processes, machine dynamics, and equipment, as well as in areas related to the application of vibration phenomena in engineering and technologies;
promotion of research aimed at the creation and improvement of machines, mechanisms, and technological equipment based on oscillatory and vibration processes;
support for the implementation of modern technological solutions focused on improving productivity, energy efficiency, and reliability of technical systems;
обеспечение scientific exchange of research results among research institutions, higher education establishments, and industrial enterprises;
development of interdisciplinary cooperation among researchers in the fields of mechanics, materials science, material processing technologies, and automation of technological processes;
dissemination of modern scientific achievements and advanced technologies related to the application of vibration processes in production and technical systems.
Publisher Vinnytsia National Agrarian University
In June 1994 the 2nd International Scientific and Technical Conference "Application of vibrations for technological purposes" was organized on the basis of Vinnytsia State Agricultural Institute. Leading experts in this field, noting the significant contribution to the school of Vibration Engineering under the leadership of P. S. Bernyk, proposed to create a professional all-Ukrainian scientific and technical journal "Vibration in engineering and technology..The journal was foundedat Vinnytsia State Agricultural Institute and P.S. Bernyk was elected to be the chief editor .
For all these years (since 1994) theJournal "vibration in engineering and technology" published 119 issues wherestudy of vibration effects, the creation of progressive energy saving technologies and equipment for their implementation were highlighted.
Currently Ihor Kupchuk, Candidate of Technical Sciences, Associate professor, Associate Professor of the Department of Engineering Mechanics and Technological Processes in the Agricultural Industry Faculty of Engineering and Technology Vinnytsia National Agrarian University is the chief editor of the "Vibrations in engineering and Technology"
The journal "Vibration in Engineering and technology", which has no analogues on the territory of Ukraine, is well known abroad.
