Technológ - Ročník 15.; Číslo 4/2023

Permanent URI for this collectionhttps://drepo.uniza.sk/handle/hdluniza/980

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Start date: 2023Subject: search.filters.subject.railway vehicle

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    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, Sebastián
    The 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.
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    Simulačná analýza trakčnej/brzdnej práce a využiteľnosť trakčnej charakteristiky pri znalosti energetických parametrov trakčného pohonu koľajového vozidla
    (University of Žilina, 2023) Čajkovič, Lukáš; Harušinec, Jozef; Pácha, Matěj; Rácek, Branislav
    This paper focuses on analyzing the driving characteristics of railway vehicles on selected tracks. The aim is to compare the vehicle's driving parameters when changing the propulsion system. The introductory part of the article discusses the transition from diesel to hydrogen propulsion, including a mention of modern vehicles using this type of propulsion. Furthermore, a specific railway vehicle with the potential for conversion to hydrogen propulsion is introduced. The main part of the article deals with the computational analysis, encompassing the characteristics of the necessary input parameters of the current propulsion system and the results of the vehicle's driving analysis. Subsequently, the vehicle's parameters were defined after the conversion to hydrogen propulsion, and an analysis was performed with these new parameters. The main goal was to compare the parameters of the current propulsion system with those of hydrogen propulsion on selected tracks.