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Comparative analysis of notched machine parts using photoelasticity and FEM
Bittner, Jiří ; Náhlík, Luboš (referee) ; Vaverka, Michal (advisor)
The diploma thesis deals with comparative analysis of stress and strain of notched machine parts using photoelasticity and finite element method (FEM). Experimental and numerical comparative analyses were performed on three models: hook, J shaped bracket and 3-point bending beam with notch. Equivalent stresses, principal stresses and its directions were analyzed. The emphasis is given on photoelasticity, the theory and principles of photoelasticity are described in more detail. FEM analysis was performed using software ANSYS 11. The work presented includes the preparation of polariscope in the laboratory of Institute of machine and industrial design in order to use it in tutorials focused on experimental stress analysis using photoelasticity.
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Skid conveyor technology
Fajkus, Pavel ; Vaverka, Michal (referee) ; Škopán, Miroslav (advisor)
This diploma thesis deals with planning conveyor technology in welding factory in Kvasiny and concept proposal of stacking equipment for skids. The report contains summary of conveyor technology in Škoda Auto a.s., description of the planning process about connection line from new hall to the existing hall, proposal of stacking equipment constructional variants, mechanism load stress analysis, inner effects results and verification by final elements method (MKP) components of the choice.
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Models of vehicle´s kinetic energy recovery
Fic, Miloslav ; Vaverka, Michal (referee) ; Nevrlý, Josef (advisor)
The bachelor thesis deals with analysis of existing knowledge in the area of vehicle kinetic energy recuperation models. This analysis is mainly focused on hydrostatic regenerative braking system models. This paper introduces stances of some authors, mathematic relationships and program tools useful for simulation of these models. Afterwards is estimation of shown studies and at least is presented future development of hydrostatic regenerative braking systems. This paper gives a sight of hydraulic recuperation system problems and it could be used as the theoretical element for next research in recuperation models area.
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Realization of educational problem based on torsional vibration apparatus
Bartošek, Daniel ; Hartl, Martin (referee) ; Vaverka, Michal (advisor)
The presented master´s thesis deals with realization educational tasks on torsional vibration apparatus. It was designed and tested six educational experiments, to extend student´s knowledge of the static and dynamic properties of rotary systems. On the experimental apparatus it is possible to use inertial discs, adjustable semi-rotary damper with forced vibration crank drive unit. New set of shafts extends the variability of experimental apparatus. Students can realize the measurement of dynamic characteristics and torsional vibration using oscilloscope. New frame for the apparatus which meet all operation requirements was also designed. The solved problematics and all educational tasks are described in new prepared materials for teaching.
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Experimental study of lubricant films in contact of machine parts
Kučera, Ondřej ; Křupka, Ivan (referee) ; Vaverka, Michal (advisor)
This bachelor thesis is focused on the description of methods for experimantal study of lubrication films in contact of machine parts, particularly for non-conformal surfaces, for which elastohydrodynamic and mixed of lubrication is typical. The methods are devided according to measured quantity into the methods for film thickness measurement, contact pressure measurement and temperature measurement. It was described the principle of these methods, the equipment, application and characteristics. Finally, evaluation of current status and further development are included.
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Design of vending machine for energy bars
Černošek, Martin ; Koutný, Daniel (referee) ; Vaverka, Michal (advisor)
This bachelor thesis is focused on the construction of vending machine for energy bars. Vending machine can sell two types of bars. It is constructed according to the client requirements. It is assumed that construction of vending machine will make the sell more effective. Thesis contains the description of main parts of vending machines, and also variants of design solutions and the final construction itself. The conclusion includes construction, technological, and economical review.
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High-bay warehouse for lacquered bodywork
Bachorík, Patrik ; Vaverka, Michal (referee) ; Vašek, Lubomír (advisor)
The aim of this diploma work was a design of a high-bay warehouse for lacquered car bodywork with focus on the issue of a conveyer line and its incorporation into the existing material flow in company Skoda Auto a.s.. Three variants of the warehouse for the lacquered car bodywork were proposed and described. For each one of them, a time analysis of car bodywork removal from the storage was carried out. The thesis was ended with a complex evaluation of the three variants according to chosen criteria, based on which the best variant was selected. That one was further depicted in layout documentation.
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