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Vsetin - Velke Karlovice Railway Track Refurbishment (section between km 17,000 - 19,950 km) Including Track Laying Technology
Kulich, Pavel ; Pokorný, Ondřej (referee) ; Říha, Tomáš (advisor)
Bachelor´s thesis deals with design of permanent way and track geometry parameters of the selected section of Vsetín – Velké Karlovice railway track. The design should be considered primarily on existing objects such as railway crossings, culverts, railway stops, bridges , etc. Thesis includes restoration of drainage and track laying technology. It should be noted, that all proposed adjustments are designed according to current regulations and legislation.
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The analysis of track response to railway vehicles
Kopeček, Josef ; Plášek, Otto (referee) ; Salajka, Vlastislav (advisor)
The diploma thesis deals with the assembly of numerical models of classical track using the finite element method in several variants. Models are compared with results obtained on analytical models. More complex models simulate the real behavior of a track running on a railway vehicle. The purpose is created methodology of modeling the railway track for use in static and dynamic analysis.
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Development of Long-pitch Corrugation in Curves of Small Radii
Valehrach, Jan ; Kohout,, Martin (referee) ; Lidmila,, Martin (referee) ; Plášek, Otto (advisor)
Throughout the operation, the rails are worn and deteriorate. With the increasing speed of rolling stock, along with higher track loads and especially in the vicinity of major traffic hubs with a higher frequency of trains, defects that did not occur to such an extent before or were not considered to be significant, are brought to the forefront of the concerns of track infrastructure managers. Even though these defects are not directly restrictive to traffic operation, they are, in any case, a source of noise and vibration. One of these defects on the railway track is the micro-geometry defect of the running surface of the railhead. In directional curves with radii of less than 600 m or 700 m, defects known as long-pitch corrugation occur on the inner rail. In curves with 300 m or smaller radii, these waves are so distinct that they are a significant source of noise and vibration. In particular, vibrations affect the track surroundings and the track itself, as they cause other defects in the track structure. This dissertation deals with long-pitch corrugation, focusing on the monitoring of wave generation and development over time. The verification of the possibility to track the development of slip waves over time is the basis for possible future models predicting the development of defects. Numerous measurements of geometric parameters of the track and microgeometry of the railheads, specifically slip waves, have been carried out in the framework of the problem. Using RMS and peak-to-peak methods, the rate of development of defects over time and the relationship with other track parameters were evaluated. Based on the obtained development curves, intervals for further maintenance interventions were estimated. A part of the thesis focuses on the deficiency or excess of cant concerning the development of long-pitch corrugation.
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Boskovice Connection Study
Jung, Jiří ; Sobotka, Lukáš (referee) ; Říha, Tomáš (advisor)
The thesis solves the design of the railroad called Boskovice connection, which is a line allowing direct connection for trains from Brno to Boskovice outside the railway station Skalice nad Svitavou. In the course of the work, the route of the connection is planned, including the connection to the Rajec-Jestrebi – Skalice nad Svitavou and Skalice nad Svitavou – Boskovice track section.
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The analysis of track response to railway vehicles
Kopeček, Josef ; Plášek, Otto (referee) ; Salajka, Vlastislav (advisor)
The diploma thesis deals with the assembly of numerical models of classical track using the finite element method in several variants. Models are compared with results obtained on analytical models. More complex models simulate the real behavior of a track running on a railway vehicle. The purpose is created methodology of modeling the railway track for use in static and dynamic analysis.
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Dynamic analysis of track
Mojžíšek, Dominik ; Salajka, Vlastislav (referee) ; Plášek, Otto (advisor)
The diploma thesis deals with descriptions of vehicle - track dynamic interface. There are described basic analytical models of railway track. The numerical models are created by using finite element methods with moving load simulated axle of rail vehicle. The aim of thesis is to create the model which most accurately describes the dynamic phenomena in the track. The results from models are compared with data obtained by measuring in the track. Next aim of thesis is to determine dependency of rail cross-sectional characteristics on equivalent rail head wear and then on rail deflection.
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