Issue №: 1(116)
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.
VIBRATIONAL DISPLACEMENT OF NESTED STRUCTURES
Kovtun Anatoly Vasilyevich Candidate of Technical Sciences, Associate Professor Department of Logistics Management National Academy of National Guard of Ukraine (Defenders of Ukraine Square, 3, Kharkiv, 61001, Ukraine) e-mail: kav-60@ukr.net; ORCID ID: https:// https:ORCID.ORG/0000-0002-8427-1005. Моб. +38(097) 708-04-41.
Kupin Serhiy Pavlovych, senior lecturer of the Department of Tactics National Academy of National Guard of Ukraine (Defenders of Ukraine Square, 3, Kharkiv, 61001, Ukraine) e-mail: ekotonkupin@gmail.com; ORCID ID: https://orcid.org/0009-0001-0807-1503. Моб. +38(098) 798 34 78.
Zhelnovach Oleksandr Oleksandrovich, senior lecturer of the Department Logistics Management National Academy of National Guard of Ukraine (Defenders of Ukraine Square, 3, Kharkiv, 61001, Ukraine) e-mail: zelnovach.aleksandr@ukr.net; ORCID ID: https://orcid.org/0000-0002-5430-6502. Моб. +38(098) 354 74 12.
The article investigates the mechanism of vibration movement of nested structures in closed volumes (pipes). Nested structures are structures whose constituent elements are located inside each other and are connected to each other by at least two opposite surfaces by dry friction forces. Such structures are often found in modern technology: transportation of long loads, fastening of pipelines with clamps, braking devices of lifting machines, etc. The peculiarities of the movement of nested structures in closed volumes (pipes) are considered in the case when a harmonic force acts on the internal element, which is directed perpendicular to its longitudinal axis. The conditions for the beginning of the movement of the internal element of the nested structure relative to the external (pipe) element are analyzed.
Based on the method of mathematical modeling, a system of equations is proposed that describes the motion of the internal element of a nested structure relative to the external element under the action of forced vibrations. A new dependence is obtained for determining the friction moment between the supports of the internal element and the external cylinder under the action of a harmonic external force.
The conducted experimental studies confirmed the possibility of vibrational movement of the internal element of the nested structure (cantilevered fixation of the rod in a cylindrical base) along the external element of the nested structure (cylinder) when applying an external force only to the internal element of the structure.
In addition, experimental studies to identify the quantitative dependence of the magnitude of the vibration force that occurs when the internal element of the nested structure moves relative to the external element (cylinder) when vibration acts on the internal element, on the magnitude of the dry friction force between the internal and external elements allowed us to assess the influence of friction forces between elements by the magnitude of the vibration force that occurs when the internal element of the nested structure moves relative to the external one.
The results obtained can be used in the creation of vibration systems for moving loads over distances that exceed the capabilities of modern vibration systems.
1. Hryniv N. T., Ravlikovska A. A. Restructuring logistics under martial law in Ukraine. Academic Visions. 2022. No. 13. P. 1–I9.
2. Omelyanov O. M., Zamriy M. A. Directions for increasing the efficiency of vibration technological machines. Vibrations in Engineering and Technologies No. 4 (99). 2020. P.49-58.
3. Poturaev V. N., Franchuk V. P., Naduty V. P. Vibration equipment and technologies in energy-intensive industries. D: National Academy of Sciences of Ukraine. 2002. 190 p.
4. Chubyk R. V. Controlled vibration technological machines. Monograph. Vinnytsia: VNAU. 2011. 355 p.
5. Povidaylo V.O. Vibrational processes and equipment. Lviv: National University "Lviv Polytechnic". 2004. 248 p.
6. Basarab V.A. Multi-frequency oscillation mode of an electromagnetic shock-vibration system. Applied Mechanics 2021. No. 5. P. 129 - 139.
7. Korunyak P. S., Kernytskyi I. S., Nishchenko I. I. Automated vibration manipulation of products and vibration manipulators / edited by V. V. Snitynskyi. Lviv: Spolom, 2021. 256 p.
8. Omelyanov O. M. Analysis of the drive mechanisms of the compound feed separator. Vibrations in Engineering and Technologies. 2017. No. 2(85). P. 121-128.
9. Korendii V. M., Gavrilchenko O. V., Shenbor V. S. Vibrating transport and handling conveyors for packaging equipment. Bulletin of the National University "Lviv Polytechnic". Optimization of production processes and technical control in mechanical engineering and instrument making. 2018. Issue 891. Pp. 35–41.
10. Palamarchuk I.P., Application of vibration technologies in the processes of storage of agricultural products / I.P. Palamarchuk, S.V. Kyurchev, V.O. Verkholantseva // Materials of the IV International Scientific and Practical Conference (May 17-18, 2018, Uman). Import-substituting technologies for growing, storing and processing horticultural and crop products. - p.113-115.
11. Bazhenov V.A., Pogorelova O.S., Postnnikova T.G. Comparison of the dynamic behavior of a vibration-shock system depending on the nature of the contact between its elements. Resistance of materials and theory of structures. 2014. No. 92, pp. 83 – 91.
12. Vibration in technology: a reference. In 6 t. / Ed. Advice: V.N. Chelomei (previous), [Vibrations in Engineering: A Handbook] Mechanical Engineering, 1981. - T. 4. Vibration processes and machines, 509 p.
13. Zaika P. M. Determination of the laws of motion of the working bodies of spatial vibration machines. Selections in engineering and technology. 2002. No. 4 (25). P.17–25.
14. Kovtun A. V., Grekov V. P., Prokopov V. O. Dynamics of complex mechanical systems with dry friction links. Ministry of Defense of Ukraine, 1996. - 115 p.
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.
