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Analysis of nozzle-to-shell joint connected to the process piping
Ondráček, Marek ; Michálková, Anežka (referee) ; Pernica, Marek (advisor)
The diploma thesis focuses on the stress analysis of the nozzle-shell junction of a pressure vessel loaded with forces and moments from the connected process piping. The diploma thesis provides general information about pressure vessels, nozzles, piping systems, and details the various methods used for the calculations. The computational part of the diploma thesis focus on the stress analysis at the nozzle-shell junction of the pressure vessel, where the analyzed nozzle is connected to the process piping. The piping generates forces and moments on the nozzle, which must be considered in the stress calculations for this junction. The software Caesar II is used to calculate the forces and moments from the piping. For the stress analysis of the junction, the thesis uses several calculation methods, including the Welding Research Council (WRC) guidelines, PD 5500 standard, CSN EN 13445 standard, and the Finite Element Method (FEM). The objective of the thesis is to evaluate the outcomes of each method, compare them, and assess their approaches to calculating the stress at the junction between the nozzle and the shell of the pressure vessel.
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Connecting rod of gas V-sixteen engine
Laštovica, Karel ; Ramík, Pavel (referee) ; Píštěk, Václav (advisor)
This diploma thesis deals with a design of a stationary engine connecting rod, its stress analysis and its safety factors. The thesis is divided into several parts. At the beginning there is a short research of connecting rods construction and a description of the engine. Then the main dimensions of a piston group and a connecting rod are defined and its 3D model is created. Next, the calculations of forces acting on the connecting rod in the crankshaft mechanism, are carried out. The following part deals with a stress analysis of the model created by MPK. From the obtained stress results, the safety factor at fatigue limit in chosen places of the connecting rod is calculated. In the conclusion, the results of the stress analysis and set safety factor level, are recapitulated.
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Analysis of stresses in left ventricular wall during isovolumic contraction
Janoušek, Petr ; Burša, Jiří (referee) ; Vaverka, Jiří (advisor)
The objective of this work is the analysis of stresses in the left heart ventricle during the isovolumic-contraction phase, in which blood is compressed without changing its volume in the ventricle. In this work, the left ventricle is modeled using a simplified axisymmetric sphere in order to be able to (1) perform an analytical solution from the relations given in the literature corresponding to the theory of linear elasticity, and (2) compare this solution with the model calculated by the finite element method. The model itself is a thick-wall sphere, which is affected by an internal overpressure arised as a reaction from the compressed blood. In order to achieve a constant internal volume, an active strain which acts against the internal pressure is also considered.
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Analysis of stresses in left ventricular wall during isovolumic contraction
Janoušek, Petr ; Burša, Jiří (referee) ; Vaverka, Jiří (advisor)
The objective of this work is the analysis of stresses in the left heart ventricle during the isovolumic-contraction phase, in which blood is compressed without changing its volume in the ventricle. In this work, the left ventricle is modeled using a simplified axisymmetric sphere in order to be able to (1) perform an analytical solution from the relations given in the literature corresponding to the theory of linear elasticity, and (2) compare this solution with the model calculated by the finite element method. The model itself is a thick-wall sphere, which is affected by an internal overpressure arised as a reaction from the compressed blood. In order to achieve a constant internal volume, an active strain which acts against the internal pressure is also considered.
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Connecting rod of gas V-sixteen engine
Laštovica, Karel ; Ramík, Pavel (referee) ; Píštěk, Václav (advisor)
This diploma thesis deals with a design of a stationary engine connecting rod, its stress analysis and its safety factors. The thesis is divided into several parts. At the beginning there is a short research of connecting rods construction and a description of the engine. Then the main dimensions of a piston group and a connecting rod are defined and its 3D model is created. Next, the calculations of forces acting on the connecting rod in the crankshaft mechanism, are carried out. The following part deals with a stress analysis of the model created by MPK. From the obtained stress results, the safety factor at fatigue limit in chosen places of the connecting rod is calculated. In the conclusion, the results of the stress analysis and set safety factor level, are recapitulated.
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