DETERMINATION OF THE FREQUENCY OF NATURAL OSCILLATIONS OF THE ELEMENTS OF THE MECHANICAL SYSTEM OF THE MOTOR CARRIAGE ROLLING STOCK
DOI:
https://doi.org/10.33042/2522-1809-2023-4-178-293-298Keywords:
motor-wagon rolling stock, electric train, traction drive, self-oscillationsAbstract
The article is devoted to highlighting the peculiarities of determining the frequencies of natural oscillations of the elements of the mechanical system of modern rolling stock. A significant volume of passenger transportation in suburban traffic on railway networks of Ukraine is carried out by the operating fleet of rolling stock, most of which are operated overtime. Taking into account the relatively slow pace of renewal of Ukrzaliznytsia's rolling stock fleet, scientific research aimed at maintaining a high level of technical and economic indicators of electric trains in operation becomes especially important. Therefore, research aimed at improving performance indicators of structural elements of rolling stock should be considered relevant. As one of the most responsible units of the mechanical system of modern rolling stock, the crew part can be singled out, which includes a traction electric drive, during the operation of which the phenomenon of jolts is observed in some modes of operation. Such a phenomenon is observed in resonant modes of operation, that is, the coincidence of the frequencies of natural and forced oscillations, which negatively affects the reliability and durability of the mechanical system as a whole. Therefore, the task of identifying resonant frequencies and eliminating the manifestation of the negative phenomenon of resonance arises. One of the possible ways to solve the given problem is to adjust the operation of the traction drive mechanism in non-resonant modes, which in turn requires research on the torsional oscillations of the mechanical drive system. The article presents an approach using geometric models of the design elements of the traction drive of electric trains, the corresponding mathematical model, and the results of modeling the shape of the frequency of natural oscillations of the traction drive of an electric train. Based on the results of the calculations, it was determined that the form of natural oscillation frequencies of the considered mechanical system has a two-node character. The proposed approach is based on the use of a tabular form of calculation of recurrent formulas. Based on the results of the research, recommendations are given for the further use of the obtained results.
References
National transport strategy of Ukraine for the period up to 2030. Ministry of Infrastructure. Approved by the order of the Cabinet of Ministers of Ukraine No. 430-z of May 30, 2018.
Ustenko O.V., Viznyak R.I., Lovska A.O., etc. (2021) Fundamentals of the theory of oscillations and stability of rolling stock: Education. Manual. Kharkiv: UkrDUZT, 129 p.
Moroz V.I., Bratchenko O.V., Tishchenko V.S. (2016) Peculiarities of construction of geometric models of module elements of the camshaft subsystem of the diesel locomotive D49. Coll. of science works – Kharkiv: UkrDUZT. Vol. 160. P. 128 – 134. https://doi.org/10.18664/1994-7852.160.2016.70396
Moroz V.I., Bratchenko O.V., Tishchenko V.S. (2016) Geometrical model of the D49 diesel locomotive valve drive mechanism. Coll. of science works – Kharkiv: UkrDUZT. Vol. 166. P. 30 – 38. https://doi.org/10.18664/1994-7852.166.2016.92813
Moroz V.I., Tishchenko V.S., Astakhova K.V. (2012) Peculiarities of calculating the natural oscillation frequencies of the crankshaft subsystem of multi-cylinder transport diesel engines. Coll. of science works – Kharkiv: UkrDAZT. Vol. 132. P. 78 – 83.
Babenko A.E., Boronko О.О., Lavrenko Y.I., Trubachev S.I. (2020) Oscillations of non-conservative mechanical systems: monograph. National Technical University of Ukraine "KPI named after Ihor Sikorsky". Kyiv. 153 p.
Prokhorenko А.А. (2016) Method for calculating the variable form of torsional vibrations of the crankshaft. INTERNAL COMBUSTION ENGINES, Kharkiv: NTU "KhPI", No. 1. pp. 14 – 19. https://doi.org/10.20998/0419-8719.2016.1.03
Kuevda Yu.V., Baluta S.M. (2017) Methodology for identifying the parameters of the elastic model of the shaft duct of the turbo unit for the simulation of torsional vibrations. Proceedings of the IED of the National Academy of Sciences of the National Academy of Sciences, Kyiv. Iss. 47. P. 37 – 44.
Terskikh V.P. (1953) Calculations of torsional oscillatory power plants. Reference manual. Volume 1. State Scientific and Technical Publishing House of Machine-Building and Ship-Building Literature, 260 p.
Aviation piston engines. Kinematics, dynamics and strength calculation. (1950) Ed. I.Sh. Neumann. Derzavne vydaynyztvo oboronnoi promyslovosty, 870 p.
Downloads
Published
How to Cite
Issue
Section
License
The authors who publish in this collection agree with the following terms:
• The authors reserve the right to authorship of their work and give the magazine the right to first publish this work under the terms of license CC BY-NC-ND 4.0 (with the Designation of Authorship - Non-Commercial - Without Derivatives 4.0 International), which allows others to freely distribute the published work with a mandatory reference to the authors of the original work and the first publication of the work in this magazine.
• Authors have the right to make independent extra-exclusive work agreements in the form in which they were published by this magazine (for example, posting work in an electronic repository of an institution or publishing as part of a monograph), provided that the link to the first publication of the work in this journal is maintained. .
• Journal policy allows and encourages the publication of manuscripts on the Internet (for example, in institutions' repositories or on personal websites), both before the publication of this manuscript and during its editorial work, as it contributes to the emergence of productive scientific discussion and positively affects the efficiency and dynamics of the citation of the published work (see The Effect of Open Access).
