Наукові публікації

Permanent URI for this community

https://dr.csbc.edu.ua/handle/123456789/40

Browse

Now showing 1 - 20 of 298

A glimpse of the potential of task-based language teaching in fostering effective communication (on the example of the topic Mood Food)
(Київський національний лінгвістичний університет, 2023) Іванова, Ірина Вікторівна; Потапенко, Людмила Віталіївна; Палієнко, Альона Володимирівна
Загальновідомо, що сучасний світ дедалі більше глобалізується. Бажання студентів стати багатомовними є зрозумілим і виправданим. Без сумніву, ті, хто вільно володіє не лише рідною, а й іншими мовами, матимуть вищу конкурентоспроможність на ринку праці. Знання іноземної мови, особливо англійської, є нагальною потребою як для професійного, так і особистісного зростання. Це також вважають важливим складником майбутнього професійного іміджу. Усі ці передумови стали підставою для запровадження в Черкаському державному бізнес-коледжі елективного курсу “Communicative English”. Запропонований інструментарій може слугувати набором ресурсів учителя для сприяння ефективній комунікації за темою MOOD FOOD. Аналіз основних сучасних тенденцій у викладанні ESL доводить, що Task-Based Language Teaching (TBLT) продовжуватиме домінувати в процесі навчання іноземних мов. Матеріал розроблено відповідно до підходу TBLT, що сприяє залученню студентів до змістовного спілкування. TBLT поєднується з іншими освітніми підходами, такими як автентичність, гейміфікація навчання, культурна обізнаність, творчість, співпраця, навчання на основі запитів. Представлені завдання та види діяльності дають змогу вчителю створити навчальне середовище, а не просто класну кімнату, надихаючи учнів і досягаючи кращих результатів навчання.
An institutional approach to the analysis of kleptocratic economy in the context of Europeanization
(LLC Publishing House “Baltija Publishing”, 2019) Пустовійт, Роберт Фрідріхович; Pustoviit, Robert; Куклін, Олег Володимирович; Kuklin, Oleg; Криворучко, Михайло Юрійович; Kryvoruchko, Mykhailo
Relevance. Kleptocratic economy, as an institutional system, is oriented towards a key function that involves gaining wealth by the ruling elite through the introduction of non-market transaction costs for companies and households, which is based on administrative, bureaucratic, and political violence. For this purpose, the kleptocratic states create such systems of state institutional management that give the authorities the possibility of rent-oriented behaviour, which impedes the functioning of the real sector of the economy and encourages the shadow one. Under such circumstances, transaction costs are redirected to administrative intervention into the market mechanism, rather than aimed at increasing its efficiency; property rights are not clearly specified; the level of uncertainty about rules and norms of economic behaviour increases, and the motivational system of business activity is distorted. As a result, on the one hand, inefficient allocation of resources and slow economic growth (decline) are observed, and on the other hand, there is the redistribution of income in favour of the ruling elite and its excessive enrichment, that is detrimental to the welfare of the majority of the population. The aim of the article is to analyse the political-economic formation of a kleptocratic basis, which in the future transforms the state and its economy into kleptocratic formations; defining ways of counteraction and institutional capacity for transformations in the direction of Ukraine’s aspirations for European integration. Methodological basis.The methodological basis of the research is the work of domestic and foreign scientists in the field of institutionalism and kleptocratic economy. The models of the development of a kleptocratic state and the influence of kleptocratic factors on the socio-economic processes in the country have been studied with the application of the method of analysis, systematization, and generalization. Results. It is determined that in order to liquidate the grounds of kleptocratic economy, it is of primary necessity to eliminate institutional obstacles that interfere with the unification of the legal and shadow sectors of the economy and ensure their institutional formalization. This requires the introduction of effective ways of restraining the ruling elite in order to restrict corruption abuses of the government and its close reigning coalition with special privileges and bureaucracies and form an institutional structure, in which firms and households have clearly defined property rights and also have the possibility to protect contractual rights provided by formal institutes. Particular attention should be paid to the ways of civil society’s monitoring the state information policy and methods of adopting laws, which is, the institutional foundation that guarantees the openness of information as to the actions of government institutions. According to the results of the study, definite measures are proposed, the implementation of which will ensure the opportunities for Europeanization, particularly in Ukraine. The emphasis is placed on the fact that the important factors of counteracting the kleptocratic economy are the wage reform and the “transparent” selection of employees in the public administration sector on the basis of their professional qualities only.
Analysis of economic situation in Ukraine under martial law and the influence of factors on the financial activities of business entities
(Черкаський національний університет імені Богдана Хмельницького, 2022) Tkachenko, Аlla; Ткаченко, Алла Анатоліївна; Zdir, Viktor; Здір, Віктор Анатолійович; Brazilii, Natalia; Бразілій, Наталія Миколаївна
The study substantiates the reason for the destabilization of the regional development processes in Ukraine after the armed attack of the russian federation.The problems faced by Ukraine's economy during the invasion are identified. Losses and expenses incurred by business, financial and economic activities of economic entities during the studied period of the full-scale invasion of the russian federation are analyzed and illustrated. Ways to restore the activities of economic entities are suggested.
Application of the matrix factor analysis method for determining parameters of the objective function for transport risk minimization
(Lublin University of Technology, 2021) Zabolotnii, Serhii; Заболотній, Сергій Васильович; Mogilei, Sergii; Могілей Сергій Олександрович
The paper regards a common transport problem with a non-classic optimization criterion to minimize transportation risks. It demonstratesthat the risk parameters of the function could be found through the factor analysis method. Besides, considering that the problem contains several pointsof sending and delivering loads, the method is dealt with as a matrix. The research also regards the algorithm of matrix factor analysis applicationfor determining parameters of the objective function for the problem to be solved. The survey results in a new method to construct the objective functionfor the optimization problem with probability parameters. It generally assists in suggesting a formal solution to such problems, foremost due to particular software.
Assessing Imbalance between Labor Quality and Needs of the Labor Market of Ukraine: Educational Challenges
(The European Center of Sustainable Development (ECSDEV), 2022) Novikova, Olga; Новікова, Ольга Федорівна; Azmuk, Nadiya; Азьмук, Надія Анатоліївна; Pankova, Oksana; Панькова, Оксана Володимирівна
The purpose of the study is to assess the imbalance between the quality of labor and the needs of the national labor market and harmonize the supply of the national education system to meet the demands of social production. The analysis of actual (statistical) data is carried out; the method of expert survey is used to identify imbalances between labor and education markets. The needs of the national labor market for experts with digital and creative skills are substantiated. The authors focused on the problem of imbalance in the market of educational services and demand for labor with appropriate skills in the labor market of Ukraine. According to the results of the analysis, it has been found that the domestic labor market is characterized, on the one hand, by excessive qualification of the labor force, which is manifested in the excess of the educational level of employees over the demand for such specialists. This is reflected in the lack of decent jobs in the national labor market. On the other hand, the national labor market is characterized by a shortage of employees with digital skills. Expert assessments of specialists in labor, education and digital economy have revealed a lack of focus of all education levels on the formation of digital and creative skills in the actual and potential labour force. Approaches to the study of imbalances in national labor markets and educational services have been further developed. The main trends in labor skills formation and demand for them among employers in the national labor market in the context of digitalization have been identified. Compared with previous studies, the research contains the results of an expert survey. The obtained results serve as a research basis for the development of strategic decisions in the field of markets balancing and education in the context of digitalization of the economy.
Black Friday аs а Tool for Sales Promotion
(Національний університет «Одеська політехніка», 2020) Іванова, Ірина Вікторівна; Іvanova, Iryna; Боровик, Тетяна Михайлівна; Borovyk, Tetiana; Руденко, Альона Юріївна; Rudenko, Alona; Залозна, Таміла Григорівна; Zalozna, Tamila
The article summarizes scientific views and defines the term of sales promotion. Features of promotion and sales promotion in B2C (Business-to-Consumer) markets are revealed. The use of digital marketing tools in the process of stimulating the sales of goods through digital channels, in particular through online stores, as well as the use of search engine optimization (SEO) and SMM-marketing is substantiated. Marketing communications and sales promotion elements used by retailers when preparing for seasonalsales are considered. The activity of consumers to retailers in the period of the preparation for grand sales, tools used by retail trade to influence the consumer and improve the activity of sales of goods is studied. The authors summarize and analyze statistic data of such online platforms as Black-friday.global, Picodi, Google Trends. The factors influencing the opportunities of online shopping and retail during Black Friday are explored and outlined. The peculiarities of trading platforms functioning, which provide online shopping space for various retail enterprises and offer marketing communications of retailers to increase the efficiency of product promotion on the Internet, are highlighted.
Building culturological background knowledge for developing business English communication skills
(Льотна академія Національного авіаційного університету, 2021) Іванова, Ірина Вікторівна; Ivanova, Iryna
The article deals with the issue of culturological background knowledge in the process of Business English teaching and learning. The author defines the essence and nature of culturological background knowledge differentiating it from the other similar terms used in recent publications. The study is aimed to substantiate the need for building culturological background knowledge in the process of Business English teaching and learning. Such qualitative methods of research as content analysis, observation and expert interviews have been applied to collect data for the study.
Cognitive and Procedural Aspects of Foreign Language Coursebook Modelling in Terms of Culturological Approach
(Приватна установа «Причорноморський науково-дослідний інститут економіки та інновацій», 2019) Іванова, Ірина Вікторівна; Ivanova, Iryna
The article deals with the problem of modelling the contents of the coursebook on the principles of culturological approach. In particular, the cognitive and procedural aspects of the contents of the professional foreign language coursebook have been highlighted. The textual and nontextual components of the coursebook contents have been analyzed. Possible ways of representation of cultural objects and phenomena in the coursebook contents have been offered. The necessity of covering all structural components of the contents of professional foreign language teaching and learning in higher educational institutions during the selection of coursebook materials has been grounded.
Coherence of accounting systems: transcendence of content and immunity of purpose
(Національна академія наук Республіки Казахстан, 2020) Kraievskyi, Volodymyr Mykolaiovych; Skoryk, Maryna Olehivna; Bohdan, Sviatoslav Volodymyrovych; Hmyria, Viktoriia; Гмиря, Вікторія Петрівна
The article deals with the essence of the transcendental approach to determining the content of accounting systems, which the authors propose for praxological use not by philosophical interpretation (unknowable) but by linguistic understanding (what goes beyond) and subjective active perception (something no one used). It is proved that the definitive formogenesis of national wealth allows to determine the factors of legitimization of its use as a system-forming basis of existential-humanistic foundations of awareness of social relations and their quantitative reflection in accounting systems. Methodological approaches to the formation of national wealth by its system-forming elements have been improved through a combination of general theoretical and specifically historical approaches to understanding both the very essence of wealth and the broader sources and economic mechanisms of its accumulation and social distribution. It is substantiated that the methodological foundations of accounting and informational display of national wealth are structured by organizational provisions of accounting policy, which is detailed as an inter-level accounting and synthetic service of accentuated objectification of a research object.
Comprehensive analysis of consumer properties of nutria velour hudrophobicized with alkenmalein-acrylsyntane composition
(Український державний університет залізничного транспорту, ПП «Технологічний центр», 2019) Данилкович, Анатолій Григорович; Danylkovych, Anatolii; Хлєбнікова, Наталія Борисівна; Khliebnikova, Nataliia
Досліджено комплекс споживних властивостей гідрофобізованого хутрового велюру нутрії з використанням алкенмалеїно-акрилсинтанової композиції. Склад цієї композиції включає алкенмалеїновий полімер, поліакриловий полімер і синтанний дубитель. Процес наповнювання-гідрофобізації хутрового велюру нутрії проводиться за рН робочого розчину 6,8–7,0, температури 40–43°С та тривалості три години і закінчується за рН 3,8–4,0. Гідрофобізований хутровий велюр нутрії отримували з неякісної за волосяним покривом сировини, неоднорідної структури в різних топографічних ділянках та зниженої щільності, але із задовільними фізико-механічними властивостями шкірної тканини. Встановлено вплив складу наповнювально-гідрофобізуючої композиції на фізико-хімічні властивості хутрового велюру. Зокрема досліджено характеристики: сумарний тепловий опір, динамічне водопромокання, всмоктування краплі води, крайовий кут змочування, намокання, паропроникність, повітропроникність та ін. Встановлено також оптимальний склад алкенмалеїно-акрилсинтанової композиції, який забезпечує формування модифікованого хутрового велюру зі шкурок нутрії з комплексом підвищених споживних властивостей порівняно з велюром овчини. Зокрема при гідрообробленні зниження показників сумарного теплового опору та паропроникності гідрофобізованого хутрового велюру нутрії проявляється у меншій мірі відповідно в 9,7 і у 1,7 рази порівняно з велюром овчини. При цьому естетичні показники велюру нутрії – колористичне оформлення та якість оздоблення шкірної тканини – також переважають велюр овчини на 39–41%. Одержані результати гідрофобізації хутрового велюру з комплексом необхідних споживних властивостей свідчать про можливість розширення асортименту матеріалів з хутрової сировини з неякісним волосяним покривом, але задовільними фізико-механічними показниками шкірної тканини. При цьому виготовлені хутрові вироби з гідрофобізованого велюру нутрії будуть придатні для експлуатації в умовах підвищеної вологості.
Comprehensive evaluation quality of biofortified pumpkin vegetables
(ЧП Ёлнать, 2021) Юдічева, Ольга Петрівна; Алавердян, Людмила Миколаївна; Самойленко, Антоніна Анатоліївна; Романенко, Олеся Валеріївна; Гореленко, Олександр Олегович; Хлєбнікова, Наталія Борисівна; Khliebnikova, Nataliia
Нині значна увага у світі зосереджена на одержанні рослинної сировини з підвищеним вмістом життєвоважливих сполук. Одним із напрямків, який постійно розвивається, є біофортифікація шляхом застосування спеціальних добрив під час вирощування. Мета: Проведення комплексної оцінки якості біофортифікованих гарбузових овочів з урахуванням вмісту важливих мікро- і макронутрієнтів та органолептичних показників. Методи: комплексний метод оцінки рівня якості. Результати: Біофортифіковані гарбузові овочі відрізняються підвищеним вмістом макро- і мікроелементів і відмінними органолептичними властивостями. Висновки: комплексні показники якості всіх досліджених зразків біофортифікованих гарбузових овочів були вищими порівняно з контролем.
Constructing Reference Plans of Two-Criteria Multimodal Transport Problem
(Transport & Telecommunication Institute, Latvia, 2021) Przystupa, Krzysztof; Qin, Zhang; Zabolotnii, Serhii; Заболотній, Сергій Васильович; Pohrebennyk, Volodymyr; Mogilei, Sergii; Могілей, Сергій Олександрович; Zhongju, Chen; Gil, Leszek
The object of this study is a multicriteria transport problem, being stated for availability of several means of cargo delivery, meaning a multimodal transport problem. The optimization criteria of the multimodal transport problem described above are two objective functions of minimizing total transportation costs and level of transport risks. Three types of transport were selected for research: automobile, rail and river (inland waterway). The results of the study lay the foundation for development of a new valid algorithm for solving multimodal transport problems like multi-criteria optimization ones. The main advantage of such an algorithm lies in its higher potential convergence rate compared to classical numerical optimization methods, which now are predominantly used to solve the problems of this type. This advantage may not be decisive, but it appears to be at least quite an important argument when choosing the method of realization for two-criteria multimodal transport problems earlier considered, especially, in case of a large dimension. Moreover, the algorithm described in the work can be applied to similar problems with any number of types of transport and optimization criteria.
Criteria for evaluation of efficiency of remote administration software
(Видавництво «Молодий вчений», 2021) Кузнецов, Денис; Захарова, Марія В'ячеславівна; Люта, Майя В'ячеславівна
The work is devoted to solving the problem of evaluating the effectiveness of remote administration software (PZVA) according to certain criteria. The concept of efficiency of PZVA is revealed in the work, criteria of efficiency of software, actions and means for their development and use are defined. Efficiency means the ability of software to provide appropriateper formance depending on the number of computingre sources used in the established conditions. Resources may in clude other software, software and hardware configuration of the system and materials. It is noted that efficiency includes a number of characteristics such as time behavior, resource use, and efficiency matching. The advantages of the above-mentioned criteria for evaluating the ELV and their disadvantages that reduce the objectivity of the evaluation of the effectiveness of the software are identified. Another important criterion is also analyzed – the security of the remote administration software. Due to the ever-increasing number of attacks on local area networks, new vulnerabilities in the software are constantly being discovered and, as a result, a new type of attack is emerging. The risks associated with insufficient connection security are considered. In addition, a huge disadvantage of using remote access programs is the defection of the perimeter of the local network. And in this regard, with the incompetent use of such software there is a risk of attackers using remote access programs. Thus, the criteria for the effectiveness of remote administration software are defined in the paper. This will allow to effectively evaluate remote administration software according to certain criteria, increase their quality and reliability, at the stage of system design and development to select software.
Current situation of agricultural enterprises financing in ukraine: economic and legal analysis
(ТОВ "ФІНТЕХАЛЬЯНС", 2019) Artemenko, Olena; Potapenko, Liudmyla; Braichenko, Serhii; Varunts, Larysa; Hmyria, Viktoriia; Гмиря, Вікторія Петрівна
Сучасне сільське господарство розвивається в напрямі підвищення ефективності виробництва аграрної продукції. Для цього необхідне стійке поєднання фінансово-економічних, правових та організаційних чинників з обов’язковим упровадженням інноваційної складової. Наукові дослідження спирається на чинну інформаційну і наукову базу, що містить методику оцінювання ефективності залучення коштів, використання якої дозволяє систематизувати низку явищ у процесі розвитку сільського господарства, уніфікувати процедуру визначення номінальних обсягів та ефективності державної допомоги за прямими методами. Досліджуються окремі проблемні правові питання правового регулювання фінансових відносин за участі сільськогосподарських підприємств; визначено й обґрунтовано необхідність виділення коштів фінансової підтримки сільськогосподарських підприємств, забезпечення адміністративного сприяння і контролю за цільовим використанням наданих коштів. Виявлено основні статті підтримки сільськогосподарських підприємств в Україні та визначено головних генераторів фінансування таких підприємств із позиції фінансовокредитних установ. Проаналізовано концептуальні моделі державної підтримки розвитку сільських територій у Канаді, Австралії, Італії та Сполучених Штатах Америки. Виокремлено основні причини незадовільного стану розвитку сільськогосподарських підприємств, зокрема економічні, соціальні, інфраструктурні, управлінські, та розкрито проблеми, що стримують розвиток аграрного сектору в цілому. Визначено необхідні умови розвитку сільськогосподарських підприємств в Україні. На основі аналізу світового досвіду політики сільського розвитку сформовано перелік напрямів підтримки підприємств аграрного сектору, потрібних для активізації розвитку сільських територій в Україні. Актуальність і необхідність активізації й гармонізації у якісно нових методологічних вимірах фінансування сільськогосподарських підприємств різних форм власності окреслили мету наукового пошуку, його контур, завдання та архітектоніку.
Determination of the country’s place for the development of creative human capital in the global dimension
(ПП "ТЕХНОЛОГІЧНИЙ ЦЕНТР", 2021) Азьмук, Надія Анатоліївна; Azmuk, Nadiya
The object of this research is creative human capital. In the context of digitalization, creative human capital enhances the competitiveness of the national economy. This requires the creation of favorable conditions in countries for the formation and development of creative abilities among carriers of human capital. Creative human capital acquires special significance and additional value in the context of the spread of the use of digital technologies in business and production processes. It is creative human capital that creates added value through the ability to innovate. These processes are responsible for the growth in the need for creative skills of human capital. Therefore, in this work, using the example of Ukraine, the place of the country in the global dimension is determined in terms of the level of development of creative human capital in the context of the digitalization of the economy. To compare the national economy with other countries for the formation of creative human capital and the level of favorable environment for its development, the data of the Talent Competitiveness Index were used.The definition of a country in the global digital landscape is based on the use of the author’s typology of employment, identifies five types depending on the combination of creative and digital skills in the labor process. In order to interpret the data obtained, the assessment of employment is coupled with the results of an expert survey. The survey involved 108 experts representing various aspects of social and labor relations: employees, employers, authorities. The results of the expert survey showed the existing demand in the national labor market for human capital, which has mastered creative and digital skills and combines in the labor process. A serious challenge for the national economy is the imbalance in the labor and education markets; it turns out to be in the demand for human capital with creative skills and the backwardness of the education market with the training of relevant specialists. An important direction of strategizing the development of the national economy is determined by balancing the labor market and education through strengthening the focus of the formal education system on the formation of creative skills. Application of the proposed approach to defining the country in the global digital landscape is a convenient tool for monitoring the level and dynamics of the country’s creative capital development, the results of which can be used in developing a national development strategy.
Determining dynamic processes in a tank after its separation from the bottom during a fire
(ПП "ТЕХНОЛОГІЧНИЙ ЦЕНТР", Український державний університет залізничного транспорту, 2025) Nesukh, Mykhailo; Несух, Михайло Михайлович; Subota, Andriy; Субота, Андрій Вікторович; Shvydenko, Andrii; Швиденко, Андрій Валерійович; Nekora, Olga; Некора, Ольга Валеріївна; Kulitsa, Oleh; Куліца, Олег Сергійович; Kropyva, Mykhailo; Кропива, Михайло Олександрович
The object of this study is the process of separating the body of a vertical steel tank from the bottom under the influence of emergency thermal and dynamic loads characteristic of fires at tank farms. The task addressed was to predict parameters of the trajectory of movement of a vertical steel tank with fuel when it is separated under the action of internal excess pressure due to the thermal effects of a fire. The dynamic processes of destruction of the weld at the bottom of the tank enclosure and the processes of fuel leakage from it were investigated. During the research, a computer model of the process of separation of a part of the tank was substantiated, which takes into account the geometric and physical nonlinearity of the material behavior under such conditions, as well as hydrodynamic processes during fuel leakage. Computer simulation showed that the height of the tank's flight when it is separated from the bottom depends on its filling level and total volume. At the same time, a lower filling level of the tank and its smaller volume determine a lower height of its bouncing. This is explained by the fact that the increase in the weight of the mechanical system, which is a tank with an oil product, leads to an increase in energy for the corresponding bouncing height. To describe the revealed patterns, a regression analysis was conducted. As a result, empirical dependences were established between the kinematic parameters of the bouncing trajectory, the design characteristics of the tank, and its filling level. The acceptable adequacy of the data obtained by the revealed regression dependence was shown. The revealed patterns are a scientific basis for compiling practical recommendations on technological requirements for storing oil products in vertical tanks to reduce the risk of their bouncing over long distances during an internal explosion due to a fire.
Developing critical thinking skills through the lens of understanding of intercultural values
(Київський національний лінгвістичний університет, 2021) Устиченко, Світлана Володимирівна; Ustychenko, Svitlana
In today’s globalized world intercultural competence, critical thinking skills are necessary to interact successfully with people from different cultures with their different values, practices, and ways of communicating to avoid conflicts and misunderstanding. English teachers as foreign language (EFL) teachers, we are preparing our students for future intercultural encounters making them flexible in their thinking and recognize that people are complex. Through reading, writing, listening and speaking activities we always can find powerful and appropriate ways to include culture and critical thinking in EFL classes. The given lesson plan «Changing lives: charity and volunteering» is developed for a group of thirteen first-year students aged 15-16, of level A2+/B1, having 6 academic hours of English as an obligatory subject per week at Cherkasy State Business College and aimed at working on the following critical thinking aspects as well as intercultural awareness and culture aspects: examining existing bias and prejudice; distinguishing observation and interpretation; understanding other students’ point of view; cultivating applying «universal intellectual values» (clarity, accuracy, consistency, depth, breadth, fairness); applying active listening techniques; considering values which impact people’s activity, encouraging compassion, volunteerism and charity.
Development of bus body technologies in terms of corrosion and durability
(ПП «ТЕХНОЛОГІЧНИЙ ЦЕНТР», Український державний університет залізничного транспорту, 2022) Ruban, Dmytro; Kraynyk, Lubomyr; Рубан, Ганна Яківна; Ruban, Hanna; Захарова, Марія В'ячеславівна; Zakharova, Maria; Бурмістров, Сергій Владиславович; Burmistrov, Sergii; Хотунов, Владислав Ігорович; Khotunov, Vladyslav; Metelap, Volodymyr
The object of this study is the technology of bus bodies and the formation of recommendations for design bodywork subject to the regulated durability of the body introduced into production. Advancing the technology of manufacturing bus bodies implies improving anti-corrosion protection, using new polymeric materials, and reducing the length of welds. The issue of corrosion resistance of bus bodies has been considered. It is established that the use of new polymeric materials will increase the corrosion resistance of bus bodies while existing technologies weakly protect against corrosion (resource up to 5 years). The peculiarity of this study is that the adhesion of new materials has been tested, with artificial aging, which confirms the durability of glued joints. According to the old technology, the body was exposed to anticorrosive treatment after welding the cladding with uncovered places left between the frame and body cladding, which provoked corrosion. The main idea is that in the new technology, the cladding is welded or glued after the body frame is fully coated with primer. New technologies and materials not used in the automotive industry have been proposed. Three variants of technologies were put into production. First: the welding of steel zinc sheets. In welding sites, the frame is covered with conductive primer. It was implemented for school buses (after 7 years, without damage). Second: gluing steel zinc sheets. It was implemented for city buses (after 6 years, without damage). Third: gluing sheets from composite materials not used in the automotive industry. The transition to new adhesive cladding technologies from composite corrosion-resistant materials instead of steel sheet, reduces by 2.5–3 times the length of welds (up to 20 years without damage). The studies have confirmed the strength of glued joints (cohesion rupture exceeds 95 %). The reliability of glued joints and high corrosion resistance of the body have been confirmed in the operation of buses. The scope of practical use of the results: bus-building plants. The reported results are suitable for production of all types while cataphoretic coatings are only for mass production
Development of technological principles of technical control of bus bodies during operation based on passive safety conditions
(Державний університет "Житомирська політехніка", 2022) Рубан, Дмитро Петрович; Ruban, Dmytro; Крайник, Любомир Васильович; Kraynyk, Lubomyr; Рубан, Ганна Яківна; Ruban, Hanna; Грубель, Михайло Григорович; Hrubel, Mykhailo; Дужий, Роман Володимирович; Duzhyi, Roman; Бабарига, Андрій Святославович; Babaryha, Andrii
The object of this study is the permissible limits of aging of bus bodies during operation and the formation of appropriate recommendations to control them based on the conditions of compliance of the body with passive safety rules. According to the current method, the new model of the bus is checked for compliance with passive safety by a destructive method. However, during operation, the physical and mechanical properties of the body deteriorate until the moment of non-compliance with the requirements of passive safety. Therefore, the principles of technical control of bus bodies under the conditions of passive safety by non-destructive methods, the implementation of which became possible during the operation of buses, have been developed. 3 implementation options have been proposed. In the first variant, visual control is complemented by a measuring tool – an ultrasonic thickness gauge for measuring the thickness of the frame pipes. This method has not previously been used in the certification of vehicles. The second option involves checking the mechanical properties during repairs on a breaking machine. It is proved that during the restoration repairs of buses, the endurance limit of the steel elements of the body frame is reduced by 1.14–3.33 times. In the third variant, the methodology for modeling and calculating the stressed-strained state of the body was improved based on the method of finite elements, taking into account the effects of corrosion and fatigue strength of the metal of the frame. When modeling, the deformation of the body racks exceeded the permissible values by 1.5–2.0 times. This non-destructive method makes it possible to check the bus for compliance with passive safety requirements during operation, which was previously impossible. The scope of practical application is the introduction of research results into the real practice of operating buses at the legislative level. The results are suitable for monitoring the technical condition of buses by non-destructive methods during operation.
Devising an approach to assessing the durability of bus body on a frame chassis
(ПП «ТЕХНОЛОГІЧНИЙ ЦЕНТР», Український державний університет залізничного транспорту, 2023) Ruban, Dmytro; Kraynyk, Lubomyr; Рубан, Ганна Яківна; Ruban, Hanna; Захарова, Марія В'ячеславівна; Zakharova, Maria; Metelap, Volodymyr; Хотунов, Владислав Ігорович; Khotunov, Vladyslav; Михайлюта, Сергій Леонтійович; Mykhaylyuta, Sergiy
The object of this study is the processes and permissible limits of aging of bus bodies on the frame chassis during operation.As a result of research by simulation method, the durability of the bus on the frame chassis, was determined, which is in the range from 5 to 11 years depending on the operating conditions. The study took into account the following factors: passen-ger occupancy, microprofile of the road, bus speed, corrosion. The durability of the bus depends pri-marily on the durability of the frame and body frame. Since the frame is made of alloy steels and heat-treated, it is not repaired but replaced with a new one when cracks in the frame are formed.When determining the durability of the bus on the frame chassis, it was found that the frame has 1.5–1.8 times greater durability than the body frame itself. This is because the frame is made of alloyed materials and has an open structure. The body frame has closed cavities, which provoke the development of corrosion with the accumulation of moisture in them.A feature of the results is that previous studies considered buses only with a load-bearing body structure.The issue of durability of bodies on the frame chassis has been considered. As experience shows, the durability of bus bodies on a frame chassis depends on many operational factors. For operat-ing organizations and manufacturing plants, it is important to provide for the durability of the bus depending on the operating conditions. The results of this study will allow operating organizations to provide for scheduled repairs, as well as take measures to increase the service life of buses during operation. For manufacturing plants, the findings will make it possible to apply rational technologies and materials to form the service life of the bus body.

Browse

Browsing Наукові публікації by Title

Results Per Page

Sort Options