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Motorcycle wheel force transducer
Krišpín, Jakub ; Drápal, Lubomír (referee) ; Tobiáš, Martin (advisor)
This thesis deals with the design of a driven motorcycle measuring wheel. The wheel is designed for a KTM RC 390 motorcycle but can be used on another motorcycle if the centre section is replaced. The wheel is designed to measure torque and longitudinal and vertical force, which is very useful for analysing the dynamics of the motorcycle. The measurement systems designed to measure the forces and moments on the wheels of the vehicles are introduced in the beginning of this thesis. Furthermore, the wheel design for the selected motorcycle is presented including the optimization of the wheel spoke shape. The optimized shape creates a region of homogeneous stress where strain gauges are installed to measure torque. Subsequently, structural analysis is performed in Ansys software using FEM. It verifies the structure in terms of strength. Then suitable strain gauges are selected and their wiring is designed. The proposed measuring wheel should serve as an alternative to commercially available measuring systems which are very expensive. The material cost of the presented wheel is approximately 78 thousand CZK.
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Pulse flow of liquid in flexible tube
Komoráš, Miroslav ; Šedivý, Dominik (referee) ; Klas, Roman (advisor)
This master’s thesis is dealing with analysis of fluid flow pulse in a flexible tube representing e.g. an artery in a human body. In ANSYS program, 3D simulations were performed, and these are so-called interrelated FSI analysis. In Maple software, 1D simulations of fluid flow in the tube were performed for various thin-walled and thick-walled variants. The aim is using these programs to determine the flow rates and pressures in the tube, its wall deformation and stress. Therefore, the theoretical part deals mainly with basic equations of flow dynamics, linear and nonlinear models and rotationally symmetric vessels. In the computational part are described individual procedures in the mentioned programs.
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Thermal-Mechanical Analysis of the Cylinder of the Four-stroke Engine
Ptáček, Petr ; Raffai, Peter (referee) ; Dlugoš, Jozef (advisor)
This diploma thesis is focused on creating a finite element method model of a four-stroke engine with a purpose to determine an impact on cylinder bore distortion caused by several types of loading. Introduction of this work covers research of possibilities in modelling thermal-structural analysis of cylinder liner and verifications of the analysis results. An Ansys model was further created and cylinder liner radial deformation caused by head bolts tightening and thermal loading coming from combustion was determined. Finally, a whole engine working cycle was simulated with a gas pressure loading and its final impact on the total cylinder liner radial deformation was defined.
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Stress-strength analysis of an impeller shaft using fluid-structure interaction modelling
Zifčáková, Barbora ; Vondál, Jiří (referee) ; Juřena, Tomáš (advisor)
This master’s thesis deals with numerical simulations of type FSI (Fluid Structure Interaction). Software used is ANSYS Fluent and ANSYS Mechanical. The aim of this thesis is to study the interaction between fluid flow in the mixing tank used in pharmaceutical industry to process eggshells and the agitator whose shaft has deformed during operation. CFD part consists of both one-phase and multi-phase transient simulations. The impact of solid body deformation on fluid flow is neglected hence only one-way Fluid Structure Interaction is considered for the simulations. Fluid flow in the tank and stress-strain behavior of the shaft is evaluated both in quasi-steady state and during start-up of the device. Computations showed that the impact of eggshells on agitator is negligible during operation (in quasi-steady state) unlike the behavior during start-up of the device when stresses and strains of the shaft are significantly higher. Possible reasons why the shaft deformed are presented and further numerical simulations are discussed and suggested.
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Comprehensive structural analysis of compressor wheel using FEM
Chromek, Lukáš ; Nehybka, Jindřich (referee) ; Civín, Adam (advisor)
This thesis explores the utilization of FEM software ANSYS in the analysis of the real blade wheel of a radial compressor used in small turbine aviation motors. This apparatus is made by První brněnská strojírna a.s., and its detached site in Velká Bíteš where it has the aviation engineering division. The aim of this thesis is a comprehensive blade wheel analysis composed of several steps. These steps include static and elasto-plastic strength analysis, which describes stress distribution and its assessment from the perspective of boundary conditions of elasticity during the use of the Hooke and the non-linear model of the material. Another step is dynamic analysis; in this case modal analysis, which describes the frequencies and its waveforms. The last part of the thesis contains thermal analysis while considering stationary and non-stationary thermal field. The analysis is then transformed into thermal-stress coupled analysis, which describes stress distribution resulting from thermal expansion of the material. The thesis follows the process of calculation simulations that are used during the design of a real impeller, thus before the creation of a prototype that undergoes real experiments.
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Structural Analysis of an Engine Block Design
Chevtaikin, Sergei ; Dlugoš, Jozef (referee) ; Drápal, Lubomír (advisor)
This master thesis focuses on structural analysis of combustion engine block. The main goal of this work was the design and compare individual solutions of long and short engine’s blocks. First part of work shows existing engine block designs and solutions. Based on the research part, the CAD design of the engine blocks and their discretization was performed by pre-processor programs. Structural analysis and their final comparison were provided by FEM and MBS programs.
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Piston of a spark-ignition engine produced by additive manufacturing
Valtrová, Martina ; Dlugoš, Jozef (referee) ; Drápal, Lubomír (advisor)
The first objective of this thesis was compiling research about currently produced pistons for internal combustion engines and about additive manufacturing and based on the acquired information deciding which type of piston makes the most of the advantages. Following this research, the next step was creating a design adjustment of a piston, which was previously designed with the conventional methods of manufacturing in mind, in a way that would make the best use of the different possibilities of additive manufacturing. There was also an optimisation carried out, which depicted the densities of material elements in the piston, showing where the material was less important. There were three variants of the additive manufactured piston created, ranging from a relatively conservative design, which could be theoretically produced by conventional methods with a more substantial subtraction of material added, to a design which could only be produced via additive manufacturing. A thermo-structural analysis at maximum engine load was carried out for all these piston models. Based on these data, a conclusion was made, whether the use of additive manufacturing was justified over the use of the conventional subtractive methods.
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Creation of an application for post-processing results of structural analyses in the space industry
Šprta, Petr ; Silvestri, Riccardo (referee) ; Lošák, Petr (advisor)
Cílem této práce je vytvoření softwarové aplikace pro dodatečné zpracování výsledků strukturálních analýz prováděných metodou konečných prvků v programu Nastran. Náplň a téma této práce vyplývá z požadavků kladených na vývoj konstrukcí v kosmickém průmyslu, kde je pro zaručení bezpečnosti zapotřebí ověřit chování struktury při mnoha zatěžovacích stavech v různých zatěžovacích podmínkách. Díky využívání lineárních statických analýz je možné využít superpozice napětí v rámci dodatečného zpracování výsledků a tím ušetřit cenný výpočetní čas a zvýšit celkovou efektivitu pevnostních výpočtů a vyhodnocování jejich výsledků. Všechny tyto aspekty by měly být zahrnuty při vývoji aplikace, jejímž cílem je načtení výsledků dílčích analýz z programu Nastran, jejich superpozice a vyhodnocení, zapsání výsledků do programu Excel a příprava textových souborů pro vizualizaci v programu HyperView. V úvodní části práce jsou popsány specifika pevnostních výpočtů v kosmickém průmyslu ze kterých vyplývá motivace a požadavky pro vývoj aplikace. V následujících částech je popsán vývoj aplikace a na závěr je její funkčnost ověřena na reálné pevnostní analýze konstrukce vyvíjené v rámci programu Evropské kosmické agenury. Práce byla vytvořena ve spolupráci s firmou SAB Aerospace.
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Stress-strain analysis of the brazed sidecar frame
Mrkva, Tomáš ; Řehák, Kamil (referee) ; Dlugoš, Jozef (advisor)
The thesis is about safety calculation of brazed sidecar frame using FEM simulations, more precisely stress-strain analysis. The first chapter is focused on the description of the brazing, the second chapter contains a brief description of the sidecar and its history. The third chapter of thesis is about the application of effective notch stress method to brazed joints and the creation of sidecar model for FEM analysis. The fourth chapter contains the procedure of creating model of geometry and FEM mesh of submodel. The last chapter of the thesis is a description and evaluation of the results of the different stress conditions, which are simulating real conditions that racing sidecar is being used in. These conditions are front wheel braking, side wheel braking, going through right turn, going through left turn and crossing unevenness.
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Stress-strength analysis of an impeller shaft using fluid-structure interaction modelling
Zifčáková, Barbora ; Vondál, Jiří (referee) ; Juřena, Tomáš (advisor)
This master’s thesis deals with numerical simulations of type FSI (Fluid Structure Interaction). Software used is ANSYS Fluent and ANSYS Mechanical. The aim of this thesis is to study the interaction between fluid flow in the mixing tank used in pharmaceutical industry to process eggshells and the agitator whose shaft has deformed during operation. CFD part consists of both one-phase and multi-phase transient simulations. The impact of solid body deformation on fluid flow is neglected hence only one-way Fluid Structure Interaction is considered for the simulations. Fluid flow in the tank and stress-strain behavior of the shaft is evaluated both in quasi-steady state and during start-up of the device. Computations showed that the impact of eggshells on agitator is negligible during operation (in quasi-steady state) unlike the behavior during start-up of the device when stresses and strains of the shaft are significantly higher. Possible reasons why the shaft deformed are presented and further numerical simulations are discussed and suggested.
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