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Assessment of service conditions of the screw grips of testing machine MTS 810
Votroubek, Tomáš ; Čermák, Jan (referee) ; Náhlík, Luboš (advisor)
This diploma thesis is aimed to assessment of safety of screw grips of testing machine MTS 810. Some parts of grips are predisposed to damage at low temperature (-180°C), e.g. spacer, isolating ceramics lamellas, etc. To guarantee its perfect function under hard laboratory conditions the finite element analysis was performed and suitable modifications grips parts have been suggested with respect to maximum of application of recent parts. Part of the thesis is devoted to suggestion of suitable tightening torque of experimental sample under different temperatures. For necessary numerical computations FEM system Ansys was used.
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Stress-strain analysis of the safety frame of the racing car
Kolivošková, Veronika ; Man, Vojtěch (referee) ; Novák, Kamil (advisor)
Topic of this bachelor thesis is the recherché and following deformation-stress analysis of the race car safety cage. This thesis is divided into three parts. The first one is about the introduction of analysis itself and the FIA regulations for homologation static load tests of the race car safety constructions. The second part describes analytical and numerical approach to the deformation-stress solution of a main arch in historical formula 1 car Ferrari 1512. The outputs of these two approaches which were then compared to determine their accuracy and result verification. On this example was executed the contact analysis which was applied in the last part of the thesis. After receiving the results and conclusions from the basic example, the last part deals with the real safety frame model of Subaru Impreza Sti N15. This chapter presents the most important part of the thesis. On the model were executed three static test simulations which have to comply with FIA regulations. The task was solved with FEM modeling.
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Bolted joint of turbocharger and cylinder head
Kolivošková, Veronika ; Píštěk, Václav (referee) ; Novák, Kamil (advisor)
The subject of this diploma thesis is the theoretical basis of the screw connection theory and the subsequent application to the specific screw connection problem. Mentioned connection is part of the turbo charged combustion engine, specifically directly between the cylinder head and the turbocharger. The diploma thesis is divided into several parts. The first part dealing with selected chapters of the screw connections and the combustion engines theory, whose knowledge is important for further chapters of this diploma thesis. The next part shows method of creating the geometric and computational model, on which were performed the appropriate sensory analyses with respect to determine the cause of the nut and bolt loose in the given connection. On the basis of the gained knowledge and their evaluation has been created a separate calculation methodology in the last part of this thesis, which describing parameters that have an impact on this undesirable phenomenon, and which should be included in analyses for similar issues. The diploma thesis was realized in cooperation with ŠKODA Auto a.s., tř. Václav Klementa 869, Mladá Boleslav, and AUDI AG, Union-Straße 1, Ingolstadt.
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Bolted joint of turbocharger and cylinder head
Kolivošková, Veronika ; Píštěk, Václav (referee) ; Novák, Kamil (advisor)
The subject of this diploma thesis is the theoretical basis of the screw connection theory and the subsequent application to the specific screw connection problem. Mentioned connection is part of the turbo charged combustion engine, specifically directly between the cylinder head and the turbocharger. The diploma thesis is divided into several parts. The first part dealing with selected chapters of the screw connections and the combustion engines theory, whose knowledge is important for further chapters of this diploma thesis. The next part shows method of creating the geometric and computational model, on which were performed the appropriate sensory analyses with respect to determine the cause of the nut and bolt loose in the given connection. On the basis of the gained knowledge and their evaluation has been created a separate calculation methodology in the last part of this thesis, which describing parameters that have an impact on this undesirable phenomenon, and which should be included in analyses for similar issues. The diploma thesis was realized in cooperation with ŠKODA Auto a.s., tř. Václav Klementa 869, Mladá Boleslav, and AUDI AG, Union-Straße 1, Ingolstadt.
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Assessment of service conditions of the screw grips of testing machine MTS 810
Votroubek, Tomáš ; Čermák, Jan (referee) ; Náhlík, Luboš (advisor)
This diploma thesis is aimed to assessment of safety of screw grips of testing machine MTS 810. Some parts of grips are predisposed to damage at low temperature (-180°C), e.g. spacer, isolating ceramics lamellas, etc. To guarantee its perfect function under hard laboratory conditions the finite element analysis was performed and suitable modifications grips parts have been suggested with respect to maximum of application of recent parts. Part of the thesis is devoted to suggestion of suitable tightening torque of experimental sample under different temperatures. For necessary numerical computations FEM system Ansys was used.
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Stress-strain analysis of the safety frame of the racing car
Kolivošková, Veronika ; Man, Vojtěch (referee) ; Novák, Kamil (advisor)
Topic of this bachelor thesis is the recherché and following deformation-stress analysis of the race car safety cage. This thesis is divided into three parts. The first one is about the introduction of analysis itself and the FIA regulations for homologation static load tests of the race car safety constructions. The second part describes analytical and numerical approach to the deformation-stress solution of a main arch in historical formula 1 car Ferrari 1512. The outputs of these two approaches which were then compared to determine their accuracy and result verification. On this example was executed the contact analysis which was applied in the last part of the thesis. After receiving the results and conclusions from the basic example, the last part deals with the real safety frame model of Subaru Impreza Sti N15. This chapter presents the most important part of the thesis. On the model were executed three static test simulations which have to comply with FIA regulations. The task was solved with FEM modeling.
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FEM simulation of an integrated longitudinal and tangential wave probe
Hora, Petr ; Červená, Olga
The aim of contribution is the finite element modeling of integrated longitudinal and shear wave probe. This type of probe was investigated by Cheng-Kuei Jen and Makiko Kobayashi in Jen (2007). Finite element calculations are performed in the commercial environment COMSOL Multiphysics. The ultrasonic transducer excitation was modeled as total force load. The received ultrasonic signal was obtained by integration of velocities at place of ultrasonic transducer. Though these simplifications the resulting ultrasonic signals are in good agreement with results presented by Cheng-Kuei Jen and Makiko Kobayashi.
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Měření magnetické susceptibility metodou MRI
Steinbauer, M. ; Bartušek, Karel ; Fiala, P.
A magnetic resonance imaging method is described for measuring the magnetic susceptibility ofweakly magnetic materials giving no MR signál. Method is based on MR gradient echo imaging phase signál, using its independency on T, time. The results obtained by Finite element method (FEM) modeling as well as data measured by MRI are introduced.
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