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Shape optimization of new circumferential steam turbine blade attachment type
Mívalt, Tomáš ; Petruška, Jindřich (referee) ; Polzer, Stanislav (advisor)
This thesis describes selection and shows calibration of material model, capable of describing cyclic softening of material. Stress-strain FEM analysis of circumferential blade attachment for last section of rotor blades of steam turbine is performed, expected lifetime of existing attachment is evaluated. Multi-parameter optimization of new-shape attachment was done, resulting in dimensions for new-shape attachment with longer lifetime. Improvements in strain amount in comparison with existing attachment were evaluated and possible RPM increase of turbine with new attachment type was calculated.
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Shape optimization of new circumferential steam turbine blade attachment type
Mívalt, Tomáš ; Petruška, Jindřich (referee) ; Polzer, Stanislav (advisor)
This thesis describes selection and shows calibration of material model, capable of describing cyclic softening of material. Stress-strain FEM analysis of circumferential blade attachment for last section of rotor blades of steam turbine is performed, expected lifetime of existing attachment is evaluated. Multi-parameter optimization of new-shape attachment was done, resulting in dimensions for new-shape attachment with longer lifetime. Improvements in strain amount in comparison with existing attachment were evaluated and possible RPM increase of turbine with new attachment type was calculated.
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On the problem of adress forms in the Portuguese language - text analysis
Wagenknechtová, Hana ; Hricsina, Jan (advisor) ; Jindrová, Jaroslava (referee)
The subject of the submitted thesis: "On the problem of address forms in the Portuguese language - text analysis" is to analyze the various address forms belonging to noun, pronoun and verb word classes. The evolution of these forms is emphasized; however, more approaches are considered since evaluating the diachronic one requires that the synchronic one is also examined. The goal is to look at the issue in several ways, taking into account the broader historical, political and sociolinguistic issues. The theoretical part is aimed at the general principles of addressing in terms of external, internal and historical linguistics and to the evolution of addressing in the Portuguese language. This includes Portuguese addressing terminology specifics, like the form of voc. The practical part describes the address forms in Brother Luís de Sousa, the historical Portuguese play (theatrical) from 1844 set in the beginning of 17th century, comparing these forms to authentic texts from that period. The conclusion presents the results of the text analyses and sums up the problems related to the issue of politeness in linguistics.
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