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Safe-life extension program for ZLIN Z 126 and 226 airplanes
Jančář, Milan ; Juračka, Jaroslav (referee) ; Augustin, Petr (advisor)
This master's thesis discusses the possibilities of safe-life extension program for ZLIN Z 126 and 226 airplanes, which despite their age and long-end production are still widespread and popular not only in the Czech Republic. The age of these aircraft is also related to the fact, that some aircraft are already approaching its border life, so there is an interest for the longest possible technical and legislative airworthiness. As mentioned in my bachelor's thesis, during the existence of this model series, there was no major damage occurred, except for sporadic exfoliation corrosion of wing flanges. Experience with maintenance of this aircraft points to certain underestimation of the current 5500hrs lifetime and it is obvious to suggest possible steps to increase the current limit. The thesis is therefore considered in this context the possibility of producing new wing flanges made of another material, performed the calculation for wing fatigue exchanged with flanges and designed technological process of this exchange, so that ZLIN Z 126 and 226 airplanes can be safely operated in the future.
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Rail materials and profiles in rail transportation
Svobodová, Anežka ; Kvarda, Daniel (referee) ; Galas, Radovan (advisor)
This bachelor’s thesis is focused on the issue of the choice of rail materials and profiles. The aim is to give a comprehensive overview of the current situation in Czech Republic and some other foreign countries. The first part is dedicated to rail steels with description of structure, current usage and indication of the scopes of consecutive development. In the second part, there are described the most frequent profiles, their history and the current state. This thesis includes also discussion part which compares current problems and requirements that can be significant to some possible research.
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Sports car rear wing numerical optimization
Feldová, Petra ; Rudolf, Pavel (referee) ; Štefan, David (advisor)
This master’s thesis is focused on optimization of rear wing of sport car by using open-source software. The optimization of 2D profile of the rear wing is present in this thesis. Python environment was chosen for optimization and evolutionary algorithm was is used as optimization function. This algorithm is further connected to Xfoil software, which is computing aerodynamic characteristic. The ratio of the lift and drag coefficients (C_L/C_D) is chosen as parameter which considers the aerodynamic efficiency. The CFD computation of flowing around the whole car is provided in open-source software OpenFOAM. . The profile optimization results to approximately 7.9 % raise of the parameter C_L/C_D, in the same wing stability. The main benefit of this work is to use open-source software for the optimization and CFD analysis, which in future might save company’s resources by not buying expensive commercial software licenses.
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The swimming hall in Ostrava
Ševčíková, Lenka ; Pilgr, Milan (referee) ; Šmak, Milan (advisor)
The goal of Master´s thesis is design and assessment of the swimming pool hall in Ostrava. Tha hall has two parts – swimming pool and other places for facility and free time activities.The hall has rectangle plan of dimension 30x47,4 and 15x45m. Three construction will be design. The steel truss girder wil be elaborate.
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Part manufacturing by roll bending
Kunc, Vítězslav ; Císařová, Michaela (referee) ; Podaný, Kamil (advisor)
The project is elaborated within the frame of bachelor studies of Mechanical Engineering. It supposes review of modern roll bending methods. In this literary study are summarized individual progressive methods, machines used for machining of roll bended parts and parts, which are by these methods made.
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Production of Rolled Profile and Its Verification by Using Numerical Simulation
Sigmund, Lukáš ; Lidmila, Zdeněk (referee) ; Řiháček, Jan (advisor)
The thesis deals with technology of hot-rolled profiles, describing total summary of principles and conditions this process is based on. There is a draft of a calibration of profile, the application of which is subsequently verified through a numerical simulation. Futher in the thesis also was verified the mechanical properties of applied construction steel S355J2 through the up-setting test and compared the results with the used material model in the simulation software Simufact Forming. Then, the test rolling of the calibrated profile was carried out. As a next step, the dimensions of the rolled bars were compared with the results of the simulation, on the basis of which the applicability and suitability of the simulation in the future development of other profiles was verified and evaluated.
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Model of conveyor of boxes
Sodomka, Petr ; Jirgl, Miroslav (referee) ; Štohl, Radek (advisor)
The first part of the thesis is focused on a belt carrier model blueprint. The next part contains the list of all the parts needed to construct the model. The realisation of the model (mechanic-wise and electric-wise) is described in a special section. A familiarisation with the PLC from Rockwell Automation company follows. The last part of the thesis is focused on the creation of a model example in a development environment of RSLogix 5000, and the launching and creating of the model.
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Integration of XFOIL software in MATLAB environment
Křižák, Michal ; Zikmund, Pavel (referee) ; Dofek, Ivan (advisor)
Thesis is concerned with program which is able to run and control XFOIL from MATLAB environment. This program is focused on bulk data processing and plotting of XFOIL results. Thesis is also concerned with brief description of XFOIL and MATLAB, description of profile characteristics and comparison numbers used in calculation by XFOIL.
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