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Design of test rig for long-term testing of couplings intended for railroad applications
Machálek, Ondřej ; Prokop, Aleš (referee) ; Řehák, Kamil (advisor)
The master thesis deals with design of test rig for long-term testing of coupling appointed to railway vehicles. At first, there is made a brief research which is related to railway coupling used for transmitting a torque. This is followed by an analysis of the most used power devices to derive real loads conditions of tested couplings. There is chosen the most appropriate conception based on made analysis and it is followed by the description of designed components. There is made a verification of modal properties non-purchased components which is necessary part of the thesis. Numerical modal analysis was performed in ANSYS Workbench software. In the end of the thesis there are included stress-strain analysis of the chosen designed components.
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Renovation of historical tram
Rozsypal, Josef ; Černý, Jiří (referee) ; Škopán, Miroslav (advisor)
The aim of this bachelor thesis is to create a methodology of basic works for the renovation of the historic tram and subsequently apply this methodology to the renovation of the historic tram 4MT. The work begins with a general historical overview. Following is a section on pre-renovation and related tasks. The next chapter is about the renovation of vehicles in general. This issue is discussed in more detail in the next chapter, which also describes the process of renovation of individual parts. The last but one chapter deals with the finishing work that follows the renovation. The last part describes the approval process for the vehicle operation with passengers.
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Anylytical solver for strength calculation of railway axles
Fišer, Petr ; Náhlík, Luboš (referee) ; Vaverka, Michal (advisor)
This master thesis deals with wheel set axles of rail vehicles, their design and methods of implementation stress analysis. In this work, I created a powered locomotive wheel set: axle and wheel. For the purpose of the design department of the Bonatrans Group a.s. company I developed an analytical solver, which allows creating stress analysis, which will be used for verifying finished design and in addition it allows printing of stress analysis as report for the railway´s offices. Next step was a stress analysis of this design of axle in this analytical solver.
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Locomotive engines ČKD
Kovář, Lukáš ; Janoušek, Michal (referee) ; Zubík, Martin (advisor)
The work contains summary of locomotive diesel engines ČKD and description of the basic specification of these engines and its comparison with modern engines from selected manufacturers. This work also focuses on specific conditions of engines used in rail vehicles.
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Modifying profile design of the door leaf for rail vehicle
Lysák, Jan ; Hruzíková, Miroslava (referee) ; Majer, Zdeněk (advisor)
This master thesis deals with creation computional model of specific door leaf which was researched and now is provided by company named IFE-CR, a.s. Finite element method analysis is performed within the standards for load conditions during the operation. Stress-strain response should be the main factor to comparing results with experiment on real door. Based on acquired knowledge from the original model we can evaluate credibility of mechanical behavior of newly designed model which has lower profil tapered from the original 42 mm to 25,4 mm. From the results of FEM analysis of the modified profile is evaluated applicability to the real operational state. At the end is quantified material and financial savings achieved by reducing the height of profile.
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Design of Tram
Řihánek, Šimon ; Pelikán, František (referee) ; Zvonek, Miroslav (advisor)
The content of this diploma thesis is design of a low-floor tram, primarily intended for inner-city use. The thesis includes a brief summary of the historical development, analysis of current trends in tram design and analysis of currently used technical solutions. The main part is devoted to the design process, resulting in shape and graphical solution of the exterior and interior arrangement while respecting the structural and ergonomic requirements in respect of passengers and the driver of the vehicle.
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Design of Electric Locomotive
Chropovský, Jiří ; Tvarůžek, Martin (referee) ; Křenek, Ladislav (advisor)
The topic of this master’s thesis is design of electric locomotive, more specifically universal independent machine made for pull of personal trains and industrial trains as well. The main aim of this design is to create compact design which follows current estetical trends and fulfill technical and ergonomic needs.
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Design of a rubber coupling for railway applications
Blach, Jiří ; Prokop, Aleš (referee) ; Řehák, Kamil (advisor)
The diploma thesis deals with the design and stress-strain analysis of a flexible coupling composed of individual rubber-textile segments. This concept allows the manufacturer to simplify and unify the production thanks to the ability to use a single segment design for multiple coupling configurations and thus leads to a reduction in costs on the part of the manufacturer. From the consumer side this allows only mechanically or chemically damaged segments to be replaced instead of the entire coupling and saves costs for the potential user. The coupling assembly is primarily designed according to the parameters of intercity electric units and locomotives, however, the individual flexible segments are not limited by this use. When designing a coupling assembly, it is necessary to place requirements primarily on the high safety of all components. The operating mode, in which the relative displacement of the input and output shafts can occur, indicates a relatively wide range of transmitted loads which, if any assembly part is improperly designed, can cause problems leading to temporary putting the entire machine/vehicle out of order. The most critical areas of the assembly include the flexible segments, the bolt connections, the strength of the hubs and the spline joint for torque transfer. Last but not least, the requirements for the non-complex production of components must be taken into account, together with the assembly and maintenance without collision of the components and the necessary tools. In order to verify the above-mentioned requirements, stress-strain analyses are performed simulating the variation of operating load conditions. Due to the reduction of hardware requirements and computational time, together with the absence of experimentally measured data of rubber and PES codes, the flexible segments were modelled at a lower level with a reduced material model favouring the tensile properties of PES cords. However, this reduction provides a more conservative approach, as this use causes higher stresses on the steel components of the assembly. Subsequently, a stress analysis of the splined joint is performed. Due to the absence of specific shaft geometry models of commercial motors and gearboxes, a parallel splines were chosen for this purpose and designed according to the specified maximum torque. The last part of the thesis is focused on verifying the tensile properties of an individual flexible segment.
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Design of Door Frame Curvature
Merkl, Martin ; Málek, Michal (referee) ; Lošák, Petr (advisor)
This diploma thesis deals with the design of door frame curvature, meant for rail vehicle. Flat glass is adhesively bonded onto the curved door frame and due to the elastic deformation the door frame bends backwards. Hence the door frame must be bend with reserve so that the elastic deformation is covered. Finite element analysis of currently manufactured door with constant curvatere has been carried out, with this analysis it has been checked that the chosen problem approach is suitable. Design of door frame curvature is then made for door frame with combined curvature (different for lower and upper part of door frame). The aim of this thesis was to design the curvature so that after glass is bonded onto it, the door frame will have the right dimensions.
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Design of rail vehicle sanding systems
Balounová, Hana ; Šperka, Petr (referee) ; Hartl, Martin (advisor)
The bachelor thesis deals with creating an overview of sanding systems, which are available on the marketplace in terms of their construction. Sanding devices are used in rail transport to incerase the adhesion during braking and moving off in bad weather condition. The thesis inculdes findings of testing influences of construction on the quality of sanding, list of companies producing sanders and their products and defining the future development trends.
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