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Computational simulation of leveling of non-circular rods
Stráník, Radim ; Návrat, Tomáš (referee) ; Petruška, Jindřich (advisor)
This bachelor’s thesis illustrates the principle of straightening rolled through long table roll straightening machines using repeated plastic deformation, based on Eulerian description of the material flow. Thesis describes the program on computational simulation process straightening rods and extends it an easy to use input module for entering non-circular cross-section rods. At the end of the discussion also introduces the optimal settings for all input parameters to achieve best results.
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Calculation of natural frequencies of a bar system using finite element method
Svoboda, Petr ; Kubík, Petr (referee) ; Návrat, Tomáš (advisor)
The task of the presented bachelor thesis has been to program an algorithm of the finite element method to calculate natural frequencies of beam systems. To solve this problem a freely available SW products (Python, libraries NumPy, SciPy, Fortran compiler etc.) should have been primarily used and thereby to check possibilities of freely available SW product application in science purposes in the field of the Continuum Mechanics tasks. For a functionality verification of the program the ANSYS code is to be used.
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Stress-strain analysis of a bar systems using finite element method
Fodor, Ján ; Fuis, Vladimír (referee) ; Návrat, Tomáš (advisor)
The aim of this bachelors thesis is primarily programming of algorithm for solving bar systems (i.e. trusses) using finite element method. Programming language Python and his modules NumPy, SciPy and Matplotlib are used . The results thus obtained are verified in the program ANSYS . This work also gives a brief overview of commercial and freely accessible scientific software. Finite Element Method is a numerical method used for solving technical problems in mechanical engineering, structural engineering, electrical engineering and related fields.
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Evaluation of risk of buckling in bimaterial columns
Benešovský, Marek ; Návrat, Tomáš (referee) ; Burša, Jiří (advisor)
Bachelor’s thesis contains the principle of determining the critical load of buckling of column with nonconstant parameters. There is a solution for the column composed of one and two materials and solutions for the column with two different cross-sections. An essential part of this work is the numerical solution, which is used for solving nonlinear equations in implicit form. In this work, these equations occur when solving columns of two materials and two different cross-sections. For the numerical solution, it is necessary to set an initial approximation. Initial aproximation and numerical solution are solved by a program, which was created for this work. In the final part, are stated several graphs. The most important graph represents relation of the ratio of approximate critical load obtained by interpolation of Euler's relation and critical load gained numerically on the ratio of Young’s modules of both materials.
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Design and construction of the task to the subject PPI
Král, Jiří ; Krejčí, Petr (referee) ; Návrat, Tomáš (advisor)
The bachelor thesis deals with creating of computational model for definition of tensity and deformations of bars system. Then the physical model is made according to the theoretical model. This physical model is used for educational purposes. Next step is measurement of stress and deformation of bars. The final part is focused on eventual variations between theoretical and real model.
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Summary of FEM aplication on the basis Open Source
Tománek, Jiří ; Vosynek, Petr (referee) ; Návrat, Tomáš (advisor)
This work focuses on the summary of currently available FEM applications on the Open Source basis which are freely available on the Internet. There are three programs presented (Salome, Roshaz and Ansys) and in each of them there was an easy simple plane performed and demonstrated. In the final part, a comparison of the results and the procedures for the award plane task in the three above mentioned programs was carried out.
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Contribution of technical equipments to treatment of blood vessel diseases
Laštůvka, Jan ; Návrat, Tomáš (referee) ; Burša, Jiří (advisor)
The goal of this bachelor’s thesis is an introduction to the anatomy and pathology of vascular system and providing an overview of technical equipment used for examination and treatment of blood vessel diseases. Using two type of blood vessel implants it illustrates the process of computation during the phase of creating a concept. In the former case the influence on blood flow and healthy blood vessel behaviour when using bifurcated blood vessel prosthesis is assessed, in the latter case the projecting computation of biflex stent construction is examined.
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The design of mechanical section of parallactic mounting
Wertheimer, Pavel ; Návrat, Tomáš (referee) ; Krejsa, Jiří (advisor)
The aim of the bachelor thesis is a constructional design of a simple parallactic mount as a functional prototype with the possibility of later production. The mount is intended for amateur astrophotography using digital reflex camera with telephoto lenses of shorter focal length (up to 200mm). Emphasis is put mainly on the portability of the mount that means low weight and small size. First part of the thesis covers possible constructional concepts and also deals with kinematics of the chosen variant. The second part deals with the problematic points of the mount itself. The outcome of the thesis is the design of the mount and its complete documentation. Owing to this it is possible to start realization of the functional prototype.
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Comparing FEM with BEM
Zajíček, Vít ; Profant, Tomáš (referee) ; Návrat, Tomáš (advisor)
The thesis explores the possibilities of dealing with problems concerning Elasticity and Strength of materials. In first chapter there is general division of approaches to those problems. Following chapter describes basic principles of Finite Element Method and Boundary Element Method and their use in some simple examples. There is a comparison of those methods as well.
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