Žilinská univerzita v Žiline
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Item Konštrukčný návrh koľajového adaptéra pre ľahké nákladné vozidlo, typ oceľ-oceľ(University of Žilina, 2024) Dižo, Ján; Fiačan, Jakub; Lovska, Alyona; Blatnický, Miroslav; Ishchuk, VadymTransportation is a quite complex system for relocation of passengers and goods for longer of shorter distances. Nowadays, a combination of several types of transport is typical for the most countries. Land transport includes road transport and railway transport. There are number of types of vehicles used for these individual kinds of transport. The most of them are able to move only on a road or on a railway track. However, there are a quite narrow group of vehicles, which can move both on a road and on a railway track. There are called rail-road vehicles. In principle, there are derived from road vehicle. The main objective of this rticle is to present an engineering design of an adapter for a light lorry. The work brings the main structural units of the rail-road vehicle and compares its properties with the previous engineering design. Despite, there are rail-road vehicles, this engineering design is characterized, that the adapter allows to set railway wheels to main track gauge.Item Návrh koľajového adaptéra typu guma-koľajnica pre ľahké nákladné vozidlo(University of Žilina, 2024) Dižo, Ján; Fiačan, Jakub; Blatnický, Miroslav; Lovska, Alyona; Ishchuk, VadymThe article is focused on design of a tyre-rail adapter to be mounted on a light road-rail vehicle. The novelty of the design consists in its possibility to change the wheelbase of the vehicle axles for different railway tracks gauges. Then, the considered light vehicle could fulfil various working tasks in a country, where more railway tracks gauges occur. The modified vehicle is a light lorry, which is intended to be used as a versatile and utility vehicle for maintenance purposes and repairing purposes.Item Determination of the dynamic load of an improved hatch cover of an open wagon during operating modes(University of Žilina, 2023) Lovska, Alyona; Gerlici, Juraj; Dižo, Ján; Blatnický, Miroslav; Ishchuk, VadymThe article presents the results of determining the dynamic load of the improved cover of an open wagon under operational conditions. The peculiarity of the manhole cover is that the canvas is formed by the upper and lower sheets, between which, there is an energy-absorbing material with viscous properties. The dynamic load of the cover when a load of 150 kg falls on it was studied. It was determined, that the use of energy-absorbing material contributes to the reduction of the cover load by 21 % compared to a typical original design. The main indicators of the dynamics of an open wagon equipped with improved manhole covers are calculated. The results of the calculations showed that the studied dynamic indicators are within the permissible limits. The conducted studies will contribute to the reduction of damage to manhole covers during operation and the cost of maintaining one wagons.Item Štúdia vplyvu medziadaptéra na dynamické zaťaženie nosnej konštrukcie plošinového vozňa(University of Žilina, 2023) Lovska, Alyona; Gerlici, Juraj; Dižo, Ján; Ishchuk, VadymIn order to reduce the dynamic load of the platform wagon, it is proposed to use an intermediate adapter between the frame and the load. The reduction of dynamic loads is carried out due to the dissipative forces that arise in the adapter when the wagon bounces. The results of mathematical modeling of the vertical loading of the platform wagon are given, taking into account the proposed solution. It was established that the accelerations acting on the supporting structure of the platform wagon are reduced by 8.5 % compared to the typical one. The acceleration acting on the load placed on the frame of the platform wagon is 11.8 % lower than that acting on it, taking into account the typical load perception scheme. The peculiarities of determining the strength of the adapter under its vertical load are highlighted. The conducted research will contribute to the creation of developments in the design of modern structures of railway vehicles.Item Odvodenie matematického modelu hnacieho mechanizmu pre pohon prídavných zariadení dopravného prostriedku(University of Žilina, 2023) Dižo, Ján; Ishchuk, Vadym; Lovska, Alyona; Blatnický, Miroslav; Molnár, DenisThe article is focused on a derivation of a mathematical model of a drive mechanism of for a drive of an additional devices of a transport mean. Additional devices are inseparable part of lorries, buses as well as railway vehicles, such as locomotives with independent traction. These additional devices serve for drive of compressors or other similar devices. The mathematical model is derived by means of the Lagrange’s quations of the second kind method. After finding the energies, the method of the reduction of mass and force quantities to the chosen part. In this case, it is reduced to the drive shaft of the considered mechanism. The presented mechanism is described by means of one equation of motion. This equation can be solved by means of the Matlab software. The last part of the article additional includes illustrations of the solved mechanism created in the Simpack multibody software, which can be analysed and the results can be compared with the results obtained from the Matlab software.Item Posúdenie stability lesného kolesového traktora vybaveného hydraulickou rukou(University of Žilina, 2023) Dižo, Ján; Blatnický, Miroslav; Ishchuk, Vadym; Lovska, Alyona; Fidrik, FilipWheeled forests tractors are inseparable part of a forest economy. Wheeled forests tractors serve for logging of logs in forests. Current wheeled forests tractors are usually equipped with hydraulic arms, which allow to expand the utility of such tractors. A tractor with a hydraulic arm can handle with wood logs without a need additional forest machine, which helps to reduce costs. On the other hand, it is necessary to analyse tractors abilities, which has such an additional equipment. This article is focused on assessment of stability of a heeled forest tractor, which is equipped by such a hydraulic arm. As the hydraulic arm changes the centre of gravity of an entire tractor, mainly with the load, safe operation of the tractor needs to know limit conditions of stability under the maximal load and in the given slope inclination.Item Analýza jazdných vlastností modifikovaného vozidla a jeho komponentov v dôsledku zmeny pohonného ústrojenstva a ovplyvnenie vzájomného pôsobenia kontaktu koleso/koľajnica(University of Žilina, 2023) Dižo, Ján; Ishchuk, Vadym; Lovska, Alyona; Blatnický, Miroslav; Solčanský, SebastiánThe presented article is focused on analysis of running properties of a modified railway vehicle and its components due to a change of the powertrain and influence of the mutual effects in a wheel/rail contact. The modification of a vehicle consists in a change of a standard diesel-electric powertrain by a new powertrain, which includes as a source of power the hydrogen fuel cells. This modification represents a quite significant modification of a vehicle structure, mainly a change of mass and position of centre of gravity individual articles of a vehicle. The analysis of running properties is performed by means of simulation computations in a commercial simulation software Simpack. Simulation model of a vehicle is called as a multibody model. This model consists of rigid bodies, which are connected by flexible modelling elements. Simulation analyses are performed for an original vehicle and for vehicle with hydrogen fuel cells. There are analysed cases of running on two types of tracks. There is found oud based on the obtained results, that the modified vehicle with the hydrogen cells has similar force distribution in a wheel/rail contact, however, the axle load of the modified vehicle does not meet required criteria.Item NORMATIVE ANALYTICAL CALCULATION OF STB TECHNOLOGY BOLTED JOINT FOR 661 SERIES RAILWAY VEHICLES(VTS pri Žilinskej univerzite v Žiline, 2023) Blatnický, Miroslav; Molnár, Denis; Dižo, Ján; Ishchuk, VadymWith increasing improvements, the design and technical characteristics of the vehicles along with their equipment change and advance as well as the train communication system [1]. The European Rail Traffic Management System (ERTMS) is the fundament of interoperability of railway transport in Slovakia. The purpose of mentioned system is to improve interoperability and performance of modern railways. The technically oriented basic project ETCS – the unified European Train Control System – is practically based on ERTMS. The ETCS aims to ensure the transmission of information from control systems in stations (or in sections between stations) to the driving vehicle [2-4].Item THE NVH ANALYSIS IN RAIL VEHICLES: A LITERATURE REVIEW(VTS pri Žilinskej univerzite v Žiline, 2023) Dižo, Ján; Blatnický, Miroslav; Ishchuk, Vadym; Molnár, Denis; Semenov, Stanislav; Mikhailov, EvgeniRailway transport represents one of the main transportation kind of transport of these days to transfer both passengers and goods. Every day people commute to work and back home using railway transport in a form of subway systems, light rail transits and other types of rail transport. These types of railway transport can create noise both to the passengers inside of the train as well as to the environment [1, 2]. If the pay is attended to noise when a human is on a board of a train, there are more than one noise source that one can hear. The main sources for interior noise in a rail vehicle are turbulent boundary layer, air conditioning noise, engine (or powertrain), auxiliary equipment, rolling noise and aerodynamic noise from bogie [1, 2]Item DERIVATION OF A SIMPLIFIED MATHEMATICAL MODEL OF A RAIL VEHICLE POWERTRAIN WITH A HYDRODYNAMIC CONVERTER(VTS pri Žilinskej univerzite v Žiline, 2023) Dižo, Ján; Blatnický, Miroslav; Ishchuk, Vadym; Lovska, Alyona; Kravchenko, OleksandrIn these days, railway transport is one of the most often used kind of transport of people and goods for shorter as well as longer distances. This is not only in many European countries, but also in other part of the world. Day by day people commute to work and to home by railway transport means, such as subway systems, light rail transits as well as by other kinds of railway transport means. The railway transport has several advantages, which make it effective, reliable, and sustainable in comparison with other kinds of transport [1]. On one hand, there are rail vehicles, which are powered from power line. On the other hand, there are rail vehicles, which has own source of power. The rail vehicles of the first group are called as dependent traction vehicles. The rail vehicles, which belong to the second group, are called independent traction vehicles. It is so-called a diesel multiple unit (abbr. DMU), it is a multiple-unit train, and it is powered by an on-board diesel engine. An DMU does not need to include a separate locomotive, therefore, an engine is incorporated into one or even in more of wagons. There is usually applied a diesel combustion engine, but, nowadays, some other alternative sources of energy are tested [2-4]. These diesel-powered single unit railway vehicles are further classified depending on their transmission type. In principle, there are recognized following types of DMUs: diesel mechanical multiple unit (abbr. DMMU), diesel-hydraulic multiple unit (abbr. DHMU) and diesel-electric multiple unit (abbr. DEMU).