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Static solution of the load-bearing structure of a multifunctional building
Svozil, Matěj ; Čairović, Dorde (referee) ; Zlámal, Martin (advisor)
The bachelor's thesis deals with the assessment and design of selected characteristic parts of a multifunctional house. The multifunctional house consists of five above-ground floors and one underground floor. The 2nd floor to the 5th floor is intended for living. The first above-ground floor is used for the operation of the fitness center and the cafe. The underground floor is intended for an underground garage and partly for storage cubicles and technical room. The assessed elements are the ceiling slab above the typical floor, the most loaded column and the reinforced concrete monolithic staircase. In order to obtain the internal forces, FEM was used using the SCIA Engineer 22 program, verified by manual MSM. The final output of the bachelor thesis is a static calculation and drawings of the reinforcement of individual structural elements. In the course of the entire assessment, the applicable standards were followed.
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Topological optimisation of the turbocharger electric actuator bracket
Směšný, Jan ; Kudláček, Petr (referee) ; Novotný, Pavel (advisor)
Topology optimization utilizes mathematical methods to develop the most efficient components in terms of mechanical properties and weight. Nowadays, it is a commonly used tool for designing components not only in the automotive, aerospace, and space industries. This work deals with the topological optimization of a metal bracket used to attach an electric actuator to a turbocharger. The turbocharger assembly is subjected to external influences, the most significant of which are vibrations from the engine. The program Ansys Workbench was used for modal and topology optimization calculations. The goal of the optimization was to minimize weight and maximize the natural frequency. The optimization takes into account a simple manufacturing method using conventional techniques (shearing & bending), which will remain the same for the optimized component. Additional care is taken to ensure, that the natural frequency of the bracket-actuator system is above the excitation frequency from the engine. The final optimization revealed that by appropriately removing material, the component's weight can be reduced by 22% without significantly degrading its dynamic properties.
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Optimizing a highly loaded components for motorsport
Šišpera, Petr ; Prokop, Aleš (referee) ; Řehák, Kamil (advisor)
This thesis deals with optimizing the rear suspension of the fifth generation Honda Civic for motorsport application. The goal is to reduce weight while increasing stiffness and precision in wheel control. The work is based on the properties of serial components, which are analyzed using FEM analysis in the Ansys program. Load conditions are calculated from vehicle dynamics and the loading of individual arms from the suspension kinematics. Suspension components are first modeled and analyzed and this data provides input information for optimization. Individual components are initially topologically optimized, based on which models are created for deformation stress analysis. The properties of the serial parts are ultimately compared to optimized ones under the most critical loading conditions and the result of the work is an optimized suspension system with lower weight and higher stiffness.
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Reinforced concrete slab of the administrative part of the depository
Jirků, Jan ; Strnad, Jiří (referee) ; Požár, Michal (advisor)
The bachelor's thesis focuses on the design and assessment of a reinforced concrete locally supported monolithic slab below the first floor of a library depository. The thesis also includes the design and assessment of a column and a prefabricated staircase. The calculation of internal forces was performed using the finite element method in the SCIA Engineer program, and its accuracy was verified by a manual calculation using the method of moment summation. The slab was assessed for ultimate limit state and serviceability limit state. Finally, based on the structural calculation, reinforcement drawings for the individual structures were prepared.
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Stress-deformation analysis of the indoor basketball construction
Kubíček, Daniel ; Kovář, Jaroslav (referee) ; Fuis, Vladimír (advisor)
The topic of this thesis is stress-strain analysis of a basketball structure in a gymnasium. This structure is divided into two parts. One part is modeled as a spatial bar system. The other part is modeled as a plane bar system. The first part of the paper deals with the research on the use of bar systems in sports. This is followed by the development of analytical computational models of the spatial and plane bar systems. These models are then used to calculate three different loading conditions. Subsequently, the models are developed for numerical solution. In the last part of this work, the analytical solution is verified by the numerical solution.
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Topology optimization of frame
Kartaš, David ; Pokorný, Přemysl (referee) ; Zeizinger, Lukáš (advisor)
This bachelor thesis deals with the problem of topological optimization of machine components, specifically frame optimization. The first part describes the different methods and techniques of topological optimization. The second part contains the actual solution of topological optimization on a selected frame. In conclusion, the results of this work are summarized and evaluated, and finally compared with the baseline frame.
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Strain and stress analysis of the effect of cementoplasty after intralesional resection of metastasis in long bones
Hrušková, Zuzana ; Kovář, Jaroslav (referee) ; Boháč, Petr (advisor)
This final thesis deals with the stress – strain analysis of the impact of cementoplasty on the femur after intralesional resection of bone metastasis. The first part provides a brief review introducing the issue of using computational modeling in static analyses of the femur. The second part describes the knowledge necessary to understand the issue, including the anatomy of the femur, the structure of bone tissues, the procedure of cementoplasty, and the basic properties of bone cements. The third part details the process of creating the computational model – geometry creation, finite element meshing, material properties and the selection of loads and boundary conditions. The final part presents and analyzes the results of the equivalent stain of the femur and evaluates the results based on Frost's hypothesis.
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Study of crack retarders geometry modification effect on integral structural panel stability with the use of Finite Element method
Moštěk, Daniel ; Augustin, Petr (referee) ; Katrňák, Tomáš (advisor)
The master’s thesis concerns itself with evaluating the impact of four dimensional parameters of a specific type of crack retarder on improving the compressional buckling strength of an integral wing panel, using the finite element method. The improvements in buckling strength were particularly assessed with concerns to the added mass of the crack retarders. The crack retarders are composed of a so-called terminal section and so-called side branches. The thesis includes a literature review on the buckling of skin-stringer panels and an overview of crack retarder types. In the practical part of the thesis created FEM models of the examined variants are described along with the achieved results, which are subsequently evaluated. It was concluded that the examined parameters related to the terminal section significantly influence the increase of buckling strength of a given variant and are efficient concerning added mass. On the other hand, the examined parameters related to the side branches were deemed less significant and their alteration was inefficient in terms of added mass.
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Analysis of deformation of control arm of turbocharger mechanism
Dvořák, Martin ; Vobejda, Radek (referee) ; Šebek, František (advisor)
This thesis is of a development character and foremostly focused on operation of a control arm inside of a turbocharger. The thesis is divided into two crucial parts. The first part is a theoretical introduction where general context, regarding function of turbochargers, is processed. The second one is the deformation analysis of control arm of turbocharger mechanism on which the whole thesis is based. The last part is final optimization. The results show that the deformation is similar when spots with low stress are removed. This fact is a key factor to achieve mass reduction for any part when the deformation stays the same.
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Computational simulation of mechanical behaviour of living cell
Wojtek, Lukáš ; Fuis, Vladimír (referee) ; Jadrná, Lucie (advisor)
The presented thesis deals with the structure of animal cells and their mechanical response to mechanical loading. Mechanically important component in the creation of a computational model of a cell is cytoskeleton. It consists of actin filaments, intermediate filaments and microtubules. The work focuses on determining the stiffness of microtubules and its effect on the overall stiffness of cells. Due to the different properties of microtubules in tension and compression, an effective modulus of elasticity has to be found using computational modeling. The influence of the newly found modulus of elasticity on the overall mechanical response of the cells was ensured by a simulation of a mechanical test of an adherent cell under pressure. That was achieved by using a hybrid computational model of cells containing, in addition to the cytoskeleton, the continuum of cells – nucleus, cytoplasm and cytoplasmic membrane. The results of this thesis should serve as a basis for further research on the effect of cytoskeleton stiffness on the mechanical response of the cell.
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