Súčasné problémy v koľajových vozidlách

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DERIVATION OF A SIMPLIFIED MATHEMATICAL MODEL OF A DMU’S POWERTRAIN
(VTS pri Žilinskej univerzite v Žiline, 2023) Dižo, Ján; Blatnický, Miroslav; Ishchuk, Vadym; Molnár, Denis
Recently, railway transport means can be divided to two main groups depending on the source of the energy. Although dependent traction rail vehicles are more and more popular and many European countries endeavour to build new and new track form them, they cannot operate in every corner of the country [1, 2]. There are regions of countries, where the building of track with electrical network is it is not worth it, it is too difficult or there are other reasons not to not to expand the electrical network for electric rail vehicles [3, 4]. Independent traction rail vehicles are nowadays the most known as train units.
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, Oleksandr
In 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).
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, Vadym
With 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].
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, Evgeni
Railway 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]
VÝPOČTY A SIMULÁCIE VIAZANÝCH MECHANICKÝCH SÚSTAV KOĽAJOVÝCH VOZIDIEL S PODDAJNÝM TELESOM
(VTS pri Žilinskej univerzite v Žiline, 2023) Ishchuk, Vadym; Dižo, Ján; Blatnický, Miroslav; Molnár, Denis; Solčanský, Sebastián
Koľajové vozidlá sú zložité mechanické systémy, ktoré pracujú v rôznych dynamických podmienkach, vrátane prechádzania oblúkov, prejazdu výhybiek a vplyvu nerovností na trati na koľajové vozidlá. Analýza týchto systémov musí byť presná a efektívna, aby sa zabezpečila ich bezpečná a spoľahlivá prevádzka. V poslednom čase rastie záujem o využívanie počítačových simulácií na štúdium dynamických vlastností a parametrov koľajových vozidiel. Konkrétne, implementácia poddajných telies v rámci simulácií systémov viacerých telies sa ukázala ako efektívna metóda na dostatočne presné zachytenie dynamických vlastností koľajových vozidiel [1-3].