Кафедра механічної та електричної інженерії

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https://dspace.pdau.edu.ua/handle/123456789/5119

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Перегляд Кафедра механічної та електричної інженерії за Автор "Basova, Yu. O."

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  • Ескіз
    Публікація
    Development and improvement of roll casting technologies for universal beam mills
    (2024) Saichuk, O.; Боровик, Олена Юріївна; Borovyk, O. Yu.; Прілєпо, Наталія Володимирівна; Priliepo, N. V.; Басова, Юлія Олександрівна; Basova, Yu. O.; Honcharenko, O.; Zakharov, A.
    The object of this research is the casting technology of double-layer rolls for universal beam mills (UBM). They are critically important components of the metallurgical industry, ensuring the production of beams, profiles, and other structural elements, widely used in construction, mechanical engineering, transport, energy, and other industries. Developing innovative approaches to manufacturing rolls is strategically important for strengthening Ukraine's production potential. Since one of the most problematic areas is the dependence on imported rolls, which leads to significant economic losses, logistical risks and restrictions on the country's technological independence. Existing domestic technologies do not always lead to achieving the necessary operational characteristics, such as wear and heat resistance, and durability, complicating the competitiveness of products on the international market. The work proposes an innovative technology for manufacturing two-layer rolls, using stationary casting molds, a bainite-martensitic outer layer structure, and optimization of temperature conditions. This provides high hardness, heat resistance, and wear resistance of the outer layer. The inner layer, made of high-plasticity materials, compensates for residual stresses and improves structural stability. The use of alloying elements (nickel, molybdenum, copper) in combination with mathematical modelling of temperature fields made it possible to reduce the number of structural defects, such as porosity and delamination while ensuring uniform connection of the layers. This is because the proposed technology combines modern approaches to alloying, heat treatment optimization, and high-tech modelling of temperature conditions during casting. A notable characteristic is the optimization of materials to withstand elevated mechanical and thermal stresses, complemented by an advanced casting mold design that enhances interlayer adhesion and minimizes the likelihood of defects. This facilitates the reliable performance of rolls under challenging operational conditions, characterized by elevated mechanical and thermal stresses. Compared with similar known solutions, the proposed technology increases the service life of rolls by 20–25 %, reduces repair and maintenance costs by 15–20 %, and increases the efficiency of production processes by reducing the frequency of equipment shutdowns.
  • Ескіз
    Документ
    Prediction of the service life of LED lamps based on the extrapolation of the luminous flux conservation factor
    (2024) Baghirov, S.; Basova, Yu. O.; Guba, L.; Kozhushko, H.; Басова, Юлія Олександрівна
    The paper presents the results of research into the luminous flux conservation factors of commercial samples of light-emitting diode lamps for general lighting during tests of up to 6.000 and 10.000 hours, as well as the results of their service life assessment based on the extrapolation of the values of the luminous flux conservation factor until the moment when this coefficient in 50% of the lamps will decrease to 70% of the initial value. The measurement of the luminous flux of the lamps was carried out every 1000 hours operation of the lamps in the mode with switching cycles: 150 minutes on at full power, after which the lamps are turned off for 30 minutes. Selection of the empirical curve of the luminous flux conservation factor should be performed by finding the initial constant and rate of change of the luminous flux using the method of least squares. The forecast of the service life, according to the recommendations of the IEC 62612 standard, was carried out for four times the test time according to the test results up to 6 thousand hours and 10 thousand hours. It is shown that the service life of lamp samples which can be declared based on test results, is up to 6.000 hours is at least 24 thousand hours (calculated 27.2 thousand hours). Forecast based on tests up to 10 thousand hours is about 36.500 hours, which is 3.500 hours less than declared by the manufacturer.
  • Ескіз
    Публікація
    The role of soft skills in communicating academic integrity
    (2025) Прілєпо, Наталія Володимирівна; Priliepo, N. V.; Басова, Юлія Олександрівна; Basova, Yu. O.
    This article explores the significance of soft skills as a fundamental tool for fostering and promoting a culture of academic integrity within the educational environment. The author analyzes how the development of critical thinking, ethical communication, empathy, and personal responsibility influences the perception of academic ethics by both students and faculty members. Special attention is paid to communication strategies that allow for the effective transmission of values such as honesty, trust, and fairness, moving beyond the formal enforcement of punitive measures. The study substantiates that interpersonal skills and emotional intelligence help in constructively resolving conflicts related to breaches of academic standards, such as plagiarism, self-plagiarism, and data falsification. It is argued that integrating soft skills training into the curriculum fosters an environment of openness and mutual respect, where academic integrity becomes an internal personal value rather than a mere external requirement. The findings of this research can be utilized to develop workshops and methodological recommendations aimed at strengthening the academic culture in higher education institutions.