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491	Návrh testovacího stavu pro dlouhodobé testování spojek určených pro kolejová vozidla / Design of test rig for long-term testing of couplings intended for railroad applications Machálek, Ondřej January 2019 (has links) 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.
492	Návrh testovacího stavu diferenciálu pro zástavbu v bezdozvukové komoře / Design of the Differential Test Rig for Testing in Anechoic Chamber Ivanič, Michal January 2020 (has links) The diploma thesis describes the design of a test stand for experimental determination of vibroacoustic parameters of a part of the powertrain system. Thesis contains a research part, describing the problems of the drive system, vibroacoustics, measuring devices and also the division and the description of test stands. At the same time, the reasons for choosing a closed loop test stand are explained. Thesis also includes the results of analytical calculations and numerical results of FEM methods performed using ANSYS software, as well as drawing documentation of individual parts.
493	Konstrukční návrh moderního těla reproduktoru s využitím nových technologií / Design of modern speaker body with usage of new technology Kůst, Martin January 2020 (has links) This diploma thesis deals with the analysis and design optimization of a speaker cabinet (enclosure) produced by the additive technology of 3D sand printing. The introductory part is devoted to the theory, both in the field of noise, vibration and the method of their calculations, as well as the theory of speakers and their systems. Numerical and experimental modal analysis is performed, which were compared to determine the mechanical properties of the new material, including material damping. This is followed by experimental and numerical harmonic analysis, with output in the form of a numerical model describing the behaviour of the structure during its excitation. The data are compared with a modal analysis of the internal acoustic space and the critical shapes and their frequencies are determined. At the end of the work, construction modifications are proposed to increase the rigidity of enclosures, the influence of which is evaluated on the created numerical models.
494	Odezva atypického vertikálního rotoru vodní turbíny na buzení nevývažkem oběžného kola a nevývažkem rotoru generátoru / Response of atypical vertical rotor of a water turbine to excitation by impeller imbalance and generator rotor imbalance Sitte, David January 2021 (has links) This master’s thesis deals with the dynamic behaviour of vertical Francis turbine, which is atypical its shaft length. In the first part of thesis, there is theoretic research of water turbine, which is followed by derivation of equations for the Stodola rotor. The second part deals with the creation of the turbine shaft in 1D and 3D. A modal analysis was performed in the ANSYS Workbench software, based on which the Campbell diagram is created and it was determined the critical speed. And the harmonic analysis from which was determined the forces response in radial bearings, amplitude of deviation in radial direction in the turbine impeller and the generator and the axial displacement located in turbine impeller and axial bearing. 1D and 3D solutions were compared between themselves.
495	GRAIN SIZE ANALYSIS OF A PRECURSOR TO A FLYING SPIT IN THE WESTERN MAUMEE BASIN IN NW OHIO, AND COMPARISON TO THE PRESQUE ISLE FLYING SPIT Smith, Courtney B. 24 August 2021 (has links) No description available. Geological Geology Geomorphology flying spit spit Great Lakes Lake Maumee Lake Erie grain size analysis Friedman principal component analysis modal analysis Presque Isle ground penetrating radar polymodal STATS program
496	Analýza drážního soustrojí motor - generator / Analysis of railway motor-generator set Mánek, Petr January 2012 (has links) This work is focused on using of modal analysis in power electrical engineering. The first part of the work explains the term of CAD systems and provides their basic classification. The next section of this thesis describes procedure for creating models in Autodesk Inventor 2012. There is shown creation sketching, 3D components, assemblies and possibility of presenting the models. Next part of this thesis describes the finite element method and the program ANSYS Workbench. In the next part of this thesis is shown sample of calculation of modal analysis in the program ANSYS Workbench. There is a description of modal analysis, synchronous machines, the process of calculating of modal analysis and evaluation of the results. The last section of this thesis describes creation of animation of the railway generator set in the program Inventor Studio.
497	Výpočtové modelování hluku v kabině letounu VUT 100 Cobra / Computational modelling of noise inside cabin of aircraft VUT 100 Cobra Prnka, Jiří January 2010 (has links) This master’s thesis deals with the computational simulation of low-frequency noise inside the cabin of small commercial airplane VUT 100 Cobra. For this low-frequncy range deterministic methods: Final Element Method (FEM) and Boundary Element Method (BEM) are used for simulation of the dynamic behaviour of the object. FEM has been used to compute eigenmodes and eigenfrequences of the structure of the aeroplane cabin and of the acoustic space inside cabin. Then response to harmonic excitation of engine represented by unit forces in place of contact has been computed. Obtained velocities on the surface of the cabin are then used as the basis for the noise calculation inside the cabin using BEM. After that effect of some construction modifications on sound level inside cabin are evaluated by computational modelling.
498	Vytvoření databáze tuhosti statorových svazků elektrických strojů točivých / Creation of database of stator core stiffness of rotational electrical machines Podzemný, Zdeněk January 2013 (has links) In this thesis is wrote up a complete procedure of stator core stiffness determination using finite element method (FEM), subsequently, the stator core stiffness database was created according to this procedure. In the next chapter is carried out a sensitivity analysis of one chosen stator core, which led to identifying parameters that affected its stiffness the most. Finally, a modal analysis of one synchronous machine was performed using FEM, in order to determine the effect of stator core stiffness on modal characteristics of the machine. Several modal shapes and corresponding natural frequencies were computed in this analysis, then only a few shapes with the highest core effect were chosen and compared.
499	Pevnostně deformační analýza uchycení filtru pevných částic na traktoru Zetor Forterra / Stress-strain Analysis of Diesel Particulate Filter Support on Tractor Zetor Forterra Kučera, Petr January 2014 (has links) The subject of this master's thesis is the FEM analysis of the construction of the diesel particulate filter support on the tractor Zetor Forterra. The introduction of this thesis is about the theoretical part dealing with the issue of emissions from diesel engines and ways to reduce them. The following part describing the creation of the computational model. Then, the static stress-strain analysis, modal analysis and fatigue analysis are solved in the ANSYS Workbench software. The assessment of the safety of the structure in terms of limit states, that may occur during the operation of the tractor, based on the results of calculations is in the conclusion of the thesis.
500	Návrh řadicího mechanismu bezprodlevové převodovky / Zeroshifting Transmission Mechanism Design Mičola, Ivo January 2014 (has links) This thesis deals with no delay gear shifting. The first part is devoted to theoretical introduction. The next part describes comprehensive approach to vehicle dynamics, the choice of gear ratios, the use of reverse engineering to model the interior of the gear housing and the actual structural design of the internal components and strength analysis. Moreover, this work should fill the gap in the available literature which is publicly accessible.

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