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Dynamic Analysis of Track
Kulich, Pavel ; Salajka, Vlastislav (referee) ; Plášek, Otto (advisor)
The diploma thesis deals with analytical description of vehicle - track dynamic interface. There are described basic analytical models which are subsequently extended in order to get a more precise description of dynamic phenomena. The aim is to compile a model that faithfully describes the dynamic phenomena in the track. These new compiled models are qualitatively compared with data obtained by measuring in the track.
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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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Switch and Crossing Design for High Speed Lines
Raif, Lukáš ; Šestáková,, Janka (referee) ; Plášek, Otto (advisor)
Different requirements for track structures, switches and crossings have recently gained prominence, in part, due to preparations of high-speed lines across the Czech Republic. High-speed turnouts must fulfil many criteria, because the speeds on main line turnouts normally reach between 250 and 350 km/h. The main requirement, which most structural modifications and turnout improvements deal with, is to reduce dynamic load. The PhD thesis aims to research in particular possibilities for reducing dynamic load caused by passing vehicles; primarily by track stiffness optimization by fastening system modifications. The work is based on the observation of a test section in Ústí nad Orlicí railway station, where switches and crossings with modified fastening systems were installed. The evaluation is then used as a basis for designing of a rail fastening system to optimize the track stiffness in high-speed switches and crossings to reduce the dynamic effects.
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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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Dynamic Analysis of Track
Kulich, Pavel ; Salajka, Vlastislav (referee) ; Plášek, Otto (advisor)
The diploma thesis deals with analytical description of vehicle - track dynamic interface. There are described basic analytical models which are subsequently extended in order to get a more precise description of dynamic phenomena. The aim is to compile a model that faithfully describes the dynamic phenomena in the track. These new compiled models are qualitatively compared with data obtained by measuring in the track.
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