Наукові публікації в рамках виконання держбюджетних науково-дослідних робіт
Permanent URI for this community
Browse
Browsing Наукові публікації в рамках виконання держбюджетних науково-дослідних робіт by Title
Now showing 1 - 20 of 99
Results Per Page
Sort Options
Item A New Fastener To Ensure The Reliability Of A Passenger Car Body On A Train Ferry.(2020) Lovska, A.; Fomin, O.To ensure the strength of the passenger car bodies during transportation on train ferries, it is proposed to mount fastening elements of chain binders on the body bolster beams. The principle of such an element is based on the hydraulic damper operation. The mathematic modelling was conducted in order to determine the dynamic loading on a passenger car body during sea transportation. The study established that the improvements mentioned made it possible to reduce the dynamic loading on the body during sea transportation by 30% in a comparison with that of a typical fastening scheme. The strength of an improved passenger car body was calculated. The maximum equivalent stresses in the body structure accounted for about 120MPa, i.e., they did not exceed the admissible values. The conducted research may contribute to ensuring the required strength of passenger car bodies during train ferry transportation, thus leading to a higher operational efficiency of train ferry transportation within the international transportation.Item Adherence to legal culture as a component of the regional industrial enterprises’ corporate innovation management while ensuring their sustainable development.(2020) Klius, Y.; Kotova, L.; Ivchuk, Y.; Skupinskyi, O.The article is to determine the role of the compliance culture as a part of the regional industrial enterprises’ corporate innovation management while ensuring their sustainable development. Any enterprise, operating in a market economy, aims to maximize profits as its main internal goal. Effective innovative development is an objective necessity for sustainable economic growth. The main goal of the innovative activity of enterprises or organizations can be designated as obtaining a certain number of innovations in the form of new products, technologies, raw materials, methods of organization and management with certain features. The formation of new and efficient innovation management systems by means of straight-line management is of great importance for industrial enterprise’s effective development management. The creation of new and efficient systems of management of innovation activity to direct it into an effective path is greatly important for effective development management of the industrial enterprise. Therefore, the innovation management corporate system creation and the study of its role in the effective development of the enterprise is extremely relevant.Item An imitation model of the financial-economic mechanism of taking strategic decisions at the enterprise.(2019) Trunina, I.; Kushal, І.; Zagirniak, D.The crisis conditions of the enterprise functioning restrain the possibilities for the innovation activity and lay down higher requirements to the determination of the tasks of the financial strategy of development. To enhance the adaptive possibilities the authors propose to use an imitation-class mathematical model, indicate the basic stages of its creation, determine the structure: a control system; a functional system consisting of functional financial and economic blocks, an information system including a database. We distinguished the basic indices for the analysis of the ability of the enterprise to take strategic decisions of both financial and economic components of the mechanism of their realization. The practical realization of the proposed imitation model of the financialeconomic mechanism of taking strategic decisions based on the calculation of the integral index provides the required information basis for the grounded strategic decision and further development of the enterprise.Item Analysis of dynamic loading of improved construction of a tank container under operational load modes.(2019) Fomin, O. V.; Lovska, A.; Gorobchenko, O.; Turpak, S.; Kyrychenko, I.; Burlutski, O.An increase in the volume of bulk cargo transportation through international transport corridors necessitates the commissioning of tank containers. Intermodalization of a tank container predetermines its load in various operating conditions depending on the type of vehicle on which it is carried: aviation, sea, air or rail. The analysis of the operating conditions of tank containers, as well as the regulatory documents governing their workload, led to the conclusion that the most dynamic loads acting on the supporting structures during transportation by rail. Namely, during the maneuvering collision of a wagon-platform, on which there are tank containers. In this case, it is stipulated that for a loaded tank container, the dynamic load is assumed to be 4g, and for an empty (for the purpose of checking the reinforcement) – 5g. It is important to note that when the tank container is underfilled with bulk cargo and taking into account movements of fittings relative to fittings, the maximum value of dynamic load can reach significantly larger values. Therefore, in order to ensure the strength of tank containers, an improvement of their structures has been proposed by introducing elastic-viscous bonds into the fittings. To determine the dynamic loading of the tank container, taking into account the improvement measures, mathematical models have been compiled, taking into account the presence of elastic, viscous and elastic-viscous bonds between the fittings, stops and fittings. It is established that the elastic bond does not fully compensate for the dynamic loads acting on the tank container. The results of mathematical modeling of dynamic loading, taking into account the presence of viscous and elastic-viscous coupling in the fittings, made it possible to conclude that the maximum accelerations per tank container do not exceed the normalized values. The determination of the dynamic loading of the tank container is also carried out by computer simulation using the finite element method. The calculation takes place in the software package CosmosWorks. The maximum values of accelerations are obtained, as well as their distribution fields relative to the supporting structure of the tank container. The developed models are verified by the Fisher criterion. The research will contribute to the creation of tank containers with improved technical, operational, as well as environmental characteristics and an increase in the efficiency of the liquid cargo transportation process through international transport corridors.Item Choice and Assessment of a Technique of Planning in Management of Production Resources of the Rural Enterprises.(2020) Ovcharenko, I.; Bogdanov, R.; Prus, N.; Koreniev, E.The relevance and problem of a research is caused by need of the choice of theoretical and methodical base of reforming and improvement of planning of production activity of the rural enterprises. Research purpose is to assess a degree of quality of planning of activity of the agricultural enterprises during the different periods of time when not only different techniques of planning were applied, but also there was respectively a different ideology of process of planning. Being based on conclusions of the carried-out analysis, it is possible to establish what methodical approaches have the right for existence further, taking into account improvement. Method of a research is the comparative analysis of rejections of actual data from planned data on two groups of indicators. Results: considerable differences as planning on two groups of indicators are revealed, trends of their behavior, which demonstrate imperfection of all technique of production planning, but not techniques of planning of the analyzed indicators or objects of a research are established. It is offered to refuse a standard method of planning of factorial indicators and to replace it with method of expert evaluations.Item Clarification of features of the wheel movement with a perspective constructive scheme on a rail(2020) Mikhailov, E.; Semenov, S.; Kliuiev, S.; Dižo, J.; Blatnický, M.; Gerlici, J.; Harušinec, J.; Kovtanets, M.The article presents the continuation of studies of the features of the wheel movement the traditional and perspective constructive scheme on a rail. Unlike the traditional design, the perspective constructive scheme of the wheel allows independent relative rotation of the support surface wheel and of its guide surface (flange) relative to their common axis of rotation. Previous authors’ works did not take into account the influence of the level of slippage in the main contact of the wheel with the rail on the value of the slippage rate in its flange contact. This article further examines the influence of this factor for both wheel designs. The results of the presented studies confirm the possibility of reducing slippage in the flange contact with the rail for a wheel of a promising design scheme in comparison with a traditional wheel. Reducing the power of friction forces in the contact of the wheel flange of a promising design scheme will reduce the resistance to movement of such a wheel along the rail, especially in curved track sections.Item Communication of Scientific and Tech-nological Systems with Regional Innovative Processes.(2019) Morhachov, I.; Buzko, I.; Ovcharenko, Ie.; Tkachenko, N.; Моргачов, І.; Бузько, І.; Овчаренко, Є.; Ткаченко, Н.The aim of the work is to clarify the interconnection of the regional concentration of innovation activity of economic entities with the regional concentration of scientific and technical systems in Ukraine. The scientific and technical systems of Ukraine are the infrastructure of innovation and investment activity of its industrial enterprises. The results of the correlation analysis allowed on the macro level to reveal the interconnection of the innovation activity of industrial enterprises in Ukraine with its scientific and technical systems. While the meso-use of the method of comparing regional structures by calculating deviations did not allow to reveal of the significant link between the regional concentration of innovation activity and the regional concentration of all types of scientific and technical systems. The relevant relationship was found only with organizations on the sphere of engineering. In addition, a higher level of interconnection of innovation activities of industrial enterprises and organizations on the sphere of engineering was revealed and by the results of correlation analysis at the macro level. Clarification of the higher role of organizations of the sphere of engineering in the innovation activity of industrial enterprises in Ukraine allows us to revise and clarify priorities regarding the objects of influence in the state regulation in the direction.Item Concept of freight wagons made of round pipes.(2020) Fomin, O.; Lovska, A.The purpose of the book is to highlight the results and features of the research carried out by the authors on the dynamics and strength of the main types of freight wagons, as well as tank containers made of round pipes under the main operating conditions of loading. Theoretical provisions, methodological foundations and practical solutions for the implementation of round pipes as bearing elements of bodies of the main types of wagons and tank containers are presented. The monograph is intended for scientific and technical specialists, whose activities are related to the design and research of the mechanics of structures of railway wagons, including scientists, designers, researchers, doctoral students and graduate students. Also, the results presented in the monograph may be of interest to specialists, whose activities are related to the design of tank containers. The monograph can be used as a teaching aid for undergraduates and bachelors of relevant specialtiesItem Conceptual basis of thermo-controllability in railway braking tribo pairs.(2019) Gorbunov, M. I.; Fomin, O. V.; Prosvirova, O. V.; Prokopenko, P. M.Nowadays, the problem of insufficient braking power is solved by increasing the number of friction pairs, resulting in an increase in resource and labor intensity, unsprung mass, resistance to movement, and low resource efficiency. Also acute is the problem of reducing the noise level when using friction brakes. The analysis of the problems of existing brake equipment led to the choice of a promising direction of research on the effectiveness of braking ‒ control of the temperature of the brake friction surfaces. Purpose. To create a method for increasing the efficiency of the braking system by controlling the cooling of the friction surfaces by adaptive air supply; to create a mathematical model of air pressure supply to the brake frictional contact in order to obtain the optimal diameter of friction lining holes and the air feed rate. Methodology. During the research, the analysis of leading modern studies and patents of technical solutions aimed at improving the frictional properties of brake devices, methods of decision-making theory and expert evaluation of methods for improving the operational characteristics of railway braking systems is conducted. Mathematical modeling of air pressure supply to the zone of relevant frictional contact is applied. Findings. A concept of adaptive energy consumption management at self-ventilation of a brake disc plate using the improved mathematical model which considers geometric parameters of air courses. A method for assessing the influence of the factors on brake equipment operation while supplying the compressed air to the frictional contact is suggested. Originality. The mathematical model of air pressure supply to brake frictional contact is developed in order to obtain the optimal diameter of the friction lining holes. Application of the suggested technique for cooling will allow advancing efficiency of operation of frictional braking elements of rolling stock, increasing the adhesive coefficient, stabilizing the temperature in the tribo-contact, decreasing the wear of brake surfaces of friction and increasing safety of operation. Practical value. As a result of the conducted research complex, the method of adaptive forced cooling of the friction surfaces of the brake was proposed and scientifically substantiated for the first time, which will provide effective characteristics of the cooling process, will allow reducing significantly the dependence of the coefficient of friction on the temperature in the contact zone of the working elements during braking. The application of the proposed developments will allow: - using the compressed air, which is drawn from the brake cylinders, effectively; - cooling the contact area of “brake pad ‒ wheel”, “brake pad ‒ disk”, by supplying compressed cooled air into the holes of the brake pad or formation in the contact zone of the active gaseous medium; - increasing braking efficiency and reducing the intensity of wear of the brake pads due to the timely removal of friction wear from the contact area; - increasing the rail traffic safety by enhancing the reliability of braking.Item Conceptual basis of thermo-controllability in railways braking tribopairs.(2019) Gorbunov, M. I.; Fomin, O. V.; Prosvirova, O. V.; Prokopenko, P. M.Nowadays, the problem of insufficient braking power is solved by increasing the number of friction pairs, resulting in an increase in resource and labor intensity, unsprung mass, resistance to movement, and low resource efficiency. Also acute is the problem of reducing the noise level when using friction brakes. The analysis of the problems of existing brake equipment led to the choice of a promising direction of research on the effectiveness of braking ‒ control of the temperature of the brake friction surfaces.Item Conceptual vision of the policy of implementing social and labor potential of the population with decentralization.(2019) Novikova, O. F.; Ostafiіchuk, Y. V.; Khandiі, O. O.; Deych, M. Y.The article defines the conceptual vision of the policy of implementing social and labor potential of the population with decentralization, formulates its basic principles as guidelines for practical actions. Essence and role of inter-municipal cooperation for intensification of social potential of communities are revealed, possible ways of its institutional support are suggested. It is found that decentralization processes require effective instruments for coordinating interests, and social mobilization plays an important role in this, which is to involve a maximum number of people in solving community problems and participating in decision making. It is concluded that social potential may turn into a decisive factor in the development of a territorial community in the implementation of the following principles: comparativeness and competitiveness; motivation; social connections and inclusion; mutual responsibility; network availability; openness and transparency; value orientation; individual social interaction; limited solidarity.Item Contemporary economic development challenges of the industry in Luhansk region.(2019) Klius, Y.; Kushal, I.; Pchelynska, H.; Chernodubova, E.The modern Ukrainian economy is characterized by significant transformational processes that are accompanied by a transition from heavy industry to the agro-industrial sector. In recent years, traditional key domestic industries with high added value in production have substantially lost their positions in the domestic and foreign markets. Especially acute the crisis phenomena are observed in the areas that are involved or are bordered by the area of the armed conflict. Before the beginning of hostilities in the East of Ukraine, Luhansk region was among the five most powerful industrial and economic regions of Ukraine. Now the region has turned from industrial to agrarian. Therefore, the matter of analysing the impact of post-conflict transformation processes in Ukraine on the region's economic development and identifying the reasons that hinder transformation in the areas of post-conflict transformation is relevant. The article assesses the impact of military actions in the east of Ukraine on the economic performance of the industry in the region. The modern problems of Luhansk region industrial enterprises development are determined. According to the results of the macro-environment factors PEST analysis of the industrial enterprises in the region the main measures to overcome the crisis phenomena in the region's economy are determined.Item Creation of the image of the new generation freight car bogie.(2018) Gorbunov, M. I.; Kara, S.; Nozhenko, O.; Fomin, O.; Vaičiūnas, G.; Petrenko, V.Analysis of the operating problems of freight car bogies are carried out, analysis of the reasons for low dynamic qualities, which do not allow to increase the speed of movement. The main directions of the development of the bogies constructions are substantiated. The image of the new generation freight car bogie is formulated based on analysis, ideas of car building projects using the method of intellectual decision support. Concept image and patented technical solutions for implementation are solving the problem of minimizing the weight of the bogie (increasing of coefficient of mass utilization) by using a modular design, application of elastic-damping structures, prestressed state of structural elements. Technical solutions improve the strength characteristic and dynamic properties of the freight car bogies on the basis of the above principles of engineering.Item Defining patterns in the longitudinal load on a train equipped with the new conceptual couplers.(2020) Fomin, O.; Lovska, A.; Kovtun, O.; Nerubatskyi, V.Item Determination of residual resource of flat wagons load-bearing structures with a 25-year service life.(2020) Fomin, O.; Vatulia, G.; Horbunov, M.; Lovska, A.; Píštěk, V.; Kučera P.The article determines the residual resource of flat wagons load-bearing structures with a 25-year service life. For this purpose, field studies of the technical condition of the loadbearing structures of flat wagons based on the wagon depot of the Foundation of the Southern Railway branch of JSC “Ukrzaliznytsia” were carried out. The flat wagon of model 13-401 was chosen as the subject. It is established that the design service life of the load-bearing structures of the studied flat wagons, taking into account the extension of their operation is not less than 18 years. The strength of the load-bearing structure of the flat wagon in the environment of SolidWorks Simulation (CosmosWorks) software by the finite element method is calculated. It is established that the maximum equivalent stresses occur in the zone of interaction of the spine beam with the pivot be equal to 337.5 MPa. Therefore, the strength of the load-bearing structure of the flat wagons is provided. The estimation of the course of the flat wagons is determined. The research was carried out in the vertical plane during the movement of the butt rail track. The calculation was performed in the MathCad software environment by the Runge- Kutta method. The assessment of the wagon is "excellent". The conducted researches will promote increase of efficiency of combined transportations in the international communication and strengthening of foreign economic positions of Ukraine in the market of transport services.Item Determination of the regularities of the covered wagon supporting structure dynamic loading when conducting fire from it in the horizontal plane.(2021) Fomin, O.; Lovska, A.; Gerlici, J.; Fomina, Yu.; Fedosov-Nikonov, D.; Prokopenko, P.A study of the supporting structure dynamic loading of a covered wagon for the military equipment transportation and for firing has been carried out. A mathematical model has been drawn for this purpose, taking into account the vertical and angular displacements relative to the longitudinal axis (side rolling) of the wagon supporting structure when firing. Accelerations as the components of the dynamic load acting on the wagon supporting structure have been determined. It was found that the accelerations acting on the wagon supporting structure in the vertical plane were about 6.0 m/s2 (0.6 g). In the horizontal plane, the accelerations were 2.6 m/s2 (0.26 g). That is, the wagon movement can be assessed as “satisfactory”. To reduce the wagon dynamic loading during the conduct of fire, it is proposed to install elastic vibration dampers under the support sectors. In this case, the horizontal acceleration was about 2 m/s2 (0.2 g). Taking into account the proposed technical solutions, the wagon dynamic load is reduced by about 25% in comparison with the case of the rigid interaction of the sector with the frame. The strength analysis of the covered wagon bearing structure has been carried out. It was found that the maximum equivalent stresses are concentrated in the area of the front stops and are about 315 MPa. The conducted research will contribute to the creation of recommendations for the design of covered wagons for the military equipment transport and for firing, as well as to increase the efficiency of the railway transport operation..Item Determining the dynamic loading and strength of the bearing structure of a covered wagon when firing from it.(2020) Fomin, O.; Lovska, A.; Kudelya, V.; Smyrnova, I.The bearing structure of a covered rail wagon has been improved to enable firing from it at motion. The covered wagon of model 11–217 was chosen as a prototype. To enable firing in the vertical plane, it has been proposed to use a sliding roof, which consists of shutters that move by means of a pneumatic or hydraulic drive. To accommodate military equipment inside the covered wagon, its frame is equipped with supporting sectors. Mathematical modeling was performed in order to determine the dynamic load on a covered rail wagon when firing from it. The mathematical model was solved in the Mathcad software package. We have established the dependence of the accelerations of the bearing structure of a covered rail wagon on the recoil force induced by the combat equipment that it hosts. It has been found that in order to maintain the dynamics indicators within acceptable limits, combat equipment should have a maximum recoil at a shot of about 3.2 kN. The maximum accelerations that act on the bearing structure of a covered wagon in a vertical plane are about 6 m/s2. In the zones of interaction between the body and bogies, the maximum accelerations are about 9.5 m/s2 and the accelerations of bogies are 10 m/s2. To reduce the dynamic load on the bearing structure of a covered rail wagon, it has been proposed to use a viscous connection between the supporting sectors and frame. We have determined the dependence of accelerations on the coefficient of viscous resistance between the supporting sectors and the bearing structure of a wagon. It has been established that taking into consideration the use of a viscous connection between the supporting sectors and frame makes it possible to reduce the dynamic load on a wagon at least by 15 %. The basic indicators of strength for the bearing structure of a covered rail wagon when firing from it have been determined. We have derived the dependence of the maximum equivalent stresses in the bearing structure of a covered wagon on the recoil force of combat equipment. The maximum equivalent stresses at a recoil force of 3.2 kN arise in the console part of the girder of a covered wagon and are about 300 MPa. The maximum displacements were registered in the area where the front stops of the auto-coupling are arranged; they are equal to 2.9 mm. The maximum deformations amounted to 6.98∙10-3. Modal analysis of the bearing structures of a covered rail wagon has been carried out. It has been determined that the values of the oscillation natural frequencies are within the permissible limits. Our study will contribute to the construction of innovative rolling stock for the transportation of military equipment and for firing at motionItem Development of a Calculation Basis for the Goals and Objectives of Innovation Management at Industrial Enterprises in the Context of Post-Conflict Transformation.(2021) Klius, Y.; Ivchenko, Y.; Rozmyslov, A.; Fatalov, V.Innovation management objectives completion phases at the industrial enterprise were developed. At the first phase a hierarchy of the corporate goals is formed. It is based on the expert and creative decision-making methods for the areas of the company's activity (production area, managerial - human resource management, financial, marketing, information-technological) and management levels (strategic, tactical, operational). The expert assessments in the second phase identify the initial goals of the innovation management system. In the third phase the relationship between goals and existing innovations in the corporation are defined. At this stage, a system of innovation management goals is formed. The proposed structure and method for forming an innovation corporate base consisting of two modules (the individual and group innovation bases), the basis of which consists of a set of job assignments and corresponding to each job assignment a combination of individual and group innovations or knowledge about them. Each task corresponds to a specific goal of managing innovation. The economic impact of introducing an integrative approach to innovation management in industrial enterprises is calculated.Item Development of the theory and methodology of controlling the local tribological contact thermomechanical loading.(2018) Gorbunov, M. I.; Kovtanets, M.; Kostyukevich, A.; Nozhenko, V.; Vaičiūnas, G.; Steišūnas, S.Theoretical and experimental studies have been carried out, which confirmed the fact that the contact temperature is the most important factor affecting the entire complex of service properties of the contacting materials. The authors of the paper propose the control of the frictional interaction of the tribological contact by controlling the temperature by forced cooling, which will stabilize the coefficient of engagement of the wheel with the rail.Item Durability Determination of the Bearing Structure of an Open Freight Wagon Body Made of Round Pipes during its Transportation on the Railway Ferry.(2019) Fomin, O. V.; Gerlici, J.; Lovska, A.; Kravchenko, K.; Prokopenko, P.; Fomina, A.; Hauser, V.In order to reduce the cost of designing and manufacturing of the new-generation open wagons, it is proposed to construct their carrying systems from round pipes. In order to exploit the proposed designs of wagons in international rail-water communication, it is assumed that they will be equipped with assemblies for fastening of chain binders. The maximal values of accelerations, as components of dynamic load acting on open wagons, made from round pipes during their transportation on a railway ferry, are determined. It is established that when moving the body in the vertical direction for a wagon located on the upper deck, the maximum acceleration value is 0.84 g, with angular displacement relative to the transverse axis for the extreme from the anchor point of the wagon body - is 0.1 g, with angular displacement around the longitudinal axis for the extreme from the bulwark of the body of the wagon - is 0.24 g. The conducted researches will enable increased efficiency of operation of open wagons through international transport corridors.