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Calculation of crane ropes
Fiala, Lukáš ; Basista, Filip (referee) ; Pokorný, Přemysl (advisor)
This master thesis deals with calculation of steel wire ropes for cranes. Concretely is acted about calculation of wire ropes overhead crane manufactured by KRÁLOVOPOLSKÁ a.s. designed for load capacities up to 25 000 kg, which is situated at hall of steelworks. Further, the calculation of wire ropes different overhead crane was made to compare the results. The solution includes calculation made using valid standards ČSN 27 0100, DIN 15020-1, FEM 1.001 and ČSN EN 13001-3-2. Finally, the procedures are evaluated and compared with each other.
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Methods for solving the tolerance chains
Fiala, Lukáš ; Mazal, Pavel (referee) ; Svoboda, Petr (advisor)
This bachelor’s thesis deals with methods of solving dimensional chains. At the beginning, basic terms related to dimensional chains are explained. The next section describes worst case, statistical, group interchangeability and compensation methods. For better explanation, an example is solved for each method. Attention is also paid to systems in which the calculation of tolerance analysis can be performed. In conclusion, statistical and compensatory methods are used at the same assembly for comparison, and then, results are compared and evaluated. The thesis should provide the reader, in which cases it is appropriate to use a certain method.
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Belt Conveyor for a bulk material
Fiala, Lukáš ; Jonák, Martin (referee) ; Kašpárek, Jaroslav (advisor)
This bachelor thesis deals with construction design of belt conveyor, which is part of woodworking chipper line. The main task is design height adjustable and folding belt conveyor for transporting wood chips and the slope of transport is to 45°, traffic performance of 7000 kgh-1 and 6 m length of the conveyor. The thesis includes a search report of angled belt conveyors, next function calculation of belt conveyor according to norm ČSN ISO 5048, design of drives derived from the tractor, strength calculation of driven drum, frame construction and control calculation of tensioning devices. The work is accompanied by required drawing documentation.
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Ergonomie kabiny zemědělských traktorů
Fiala, Lukáš
The bachelor thesis Ergonomics of the cab of agricultural tractors presents general ergonomics, its application in agricultural tractors and especially in the cab of agricultural tractors. The aim of this bachelor thesis was to compare five ergonomic features of five best-selling agricultural tractors in the Czech Republic, whose maximum engine power intersects at 202 to 206 kW. The methodology was selected based on the literature and adapted to the agricultural tractor operator. Finally, the trend in agricultural tractor cabs in terms of ergonomics was presented.
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Computational modelling of the nanoindentation with Berkovich indenter
Fiala, Lukáš ; Fuis, Vladimír (referee) ; Kovář, Jaroslav (advisor)
This diploma thesis deals with computational modelling of the nanoindentation of tungsten with Berkovich indenter. In the beginning of thesis, research about nanoindentation test and Oliver-Pharr analysis is performed. The next part of thesis deals with deformation-stress analysis of the nanoindentation test with the linear-elastic model of material of tungsten and with comparison of results obtained with a diamond indenter and with an ideal rigid indenter. In the following model, plastic deformation is already considered. On the computational model with elasto-plastic model of material a sensitivity analysis of the influence of specimen and indenter dimensions and the influence of the penetration on results determined using the Oliver-Pharr analysis is performed. Furthermore, the applicability of the correction factors which were founded in the literature is assessed on this model and their exact value is determined. The last part of the work deals with the analysis of the influence of blunting of the indenter on results of the nanoindentation test and the comparison of different approaches for determining the projection of the contact surface.
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Methods for solving the tolerance chains
Fiala, Lukáš ; Mazal, Pavel (referee) ; Svoboda, Petr (advisor)
This bachelor’s thesis deals with methods of solving dimensional chains. At the beginning, basic terms related to dimensional chains are explained. The next section describes worst case, statistical, group interchangeability and compensation methods. For better explanation, an example is solved for each method. Attention is also paid to systems in which the calculation of tolerance analysis can be performed. In conclusion, statistical and compensatory methods are used at the same assembly for comparison, and then, results are compared and evaluated. The thesis should provide the reader, in which cases it is appropriate to use a certain method.
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Tour de France: The effects of the geographical features of the race and stages on the results of the best cyclists and their change over time
Fiala, Lukáš ; Tomeš, Jiří (advisor) ; Bačík, Vladimír (referee)
FIALA, L. (2020): Tour de France: The effects of the geographical features of the race and stages on the results of the best cyclists and their change over time. Diploma thesis, Prague: Charles University, Faculty of Science, 152 pp. The diploma thesis deals with Tour de France, a three-week bicycle race whose first edition was in 1903. The work's goal is to analyse the evolution of the most important cycling race in the world after the World War II in terms of its geographical features, which affect the performance of racers, and so to differentiate successful cyclists based on their qualities on one hand and identify those parts of the race (stages) that are crucial to success, on the other hand. Another goal of the thesis is to find out how the influence of geographical conditions on performance changes over time and whether and how the categories (types) of cyclist change in this context. The work is consisted into two parts: the theoretical-methodological part and the analysis of the subject of interest. The theoretical and methodological part is based on the approaches and knowledge of sport geography, while it is almost impossible to rely on real research publications devoting to cycling and stage races. The relevant literature dealing with stage races, the Grand Tour and especially the Tour...
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Calculation of crane ropes
Fiala, Lukáš ; Basista, Filip (referee) ; Pokorný, Přemysl (advisor)
This master thesis deals with calculation of steel wire ropes for cranes. Concretely is acted about calculation of wire ropes overhead crane manufactured by KRÁLOVOPOLSKÁ a.s. designed for load capacities up to 25 000 kg, which is situated at hall of steelworks. Further, the calculation of wire ropes different overhead crane was made to compare the results. The solution includes calculation made using valid standards ČSN 27 0100, DIN 15020-1, FEM 1.001 and ČSN EN 13001-3-2. Finally, the procedures are evaluated and compared with each other.
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