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Vortex induced vibrations
Szarka, Beáta ; Pluskal, Tomáš (referee) ; Rudolf, Pavel (advisor)
Tato bakalářská práce se zabývá kmitáním vyvolaném vírami na různých průřezech. Teoretická část poskytuje přehled současných trendů výroby energie a představuje typ hydrokinetického sběrače energie VIVACE konvertor. Hlavním principem systému je odtrhávání víru a vznik Kármánové vírové stezky podél tělesa ponořeného do proudící tekutiny. Praktická část se zabývá vyhodnocením různých profilů podle sil působící na těleso, frekvencí a Strouhalového čísla pomocí 2D CFD simulací. Výstupem je výběr ideálního tvaru průřezu válce pro konvertor VIVACE.
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Dynamic analysis of an in-line arranged cylindrical chimney
Harazim, Petr ; Kanický, Viktor (referee) ; Salajka, Vlastislav (advisor)
The diploma thesis deals with the response of a steel smokestack structure to wind loads. A detailed computational model implementing the finite element method was created in accordance with the available drawing documentation. The new smokestack was placed next to an existing one, thus it can be assumed that these two structures will affect each other. The thesis also elaborates on the problems of aerodynamic and aeroelastic stability of the earlier smokestack; in particular, the occurrence of vortex shedding in resonance with eigenfrequency of the structure, with the use of the program ANSYS CFX. The evaluation of the structure includes survey of the strength and deflections of the structure. The calculations are in accordance with valid ČSN EN norms.
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Wind load on truss high-rise structures
Komárková, Petra ; Vlk, Zbyněk (referee) ; Nevařil, Aleš (advisor)
This Bachelor´s thesis concerns wind load effects on truss high-rise structure. The aim is to describe response of lattice tower on effects of mean wind load, fluctuations and vortex shedding action. Further problem includes an influence of rime on aerodynamic characteristics of profiles. The structure is performed by means of computing software ANSYS. In the theoretical part there are procedures describing how to determine load on structure and basic theory of calculation. Then the applied part follows the theoretical one and describes operations in ANSYS.
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Wind loads of building structures
Štěrba, Martin ; Kala, Jiří (referee) ; Hradil, Petr (advisor)
The bachelor thesis deals with the analysis of the effects of wind load on building structures. In the context of the work is solved the numerical modeling of flow around the solid cylindrical bodies at high Reynolds numbers. To the simulations has been used computational software ANSYS CFX. The outputs of the work are the values of Strouhal numbers and the values of drag and lift coefficient depending on the Reynolds number.
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Static and dynamic assessment of an outlook tower construction
Valíček, Jan ; Kala, Jiří (referee) ; Salajka, Vlastislav (advisor)
This thesis deals with static and dynamic analysis of an lookout tower construction. For dynamic analysis a computational model in ANSYS software is created. Static analysis is performed by Scia Engineer software. Both of this software use finite element method. It is also focused on wind load determination by Eurocode 1, structural factor calculation, modal analysis and vortex shedding. Verification of selected parts according to Eurocodes is included.
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Static and dynamic assessment of an outlook tower construction
Valíček, Jan ; Kala, Jiří (referee) ; Salajka, Vlastislav (advisor)
This thesis deals with static and dynamic analysis of an lookout tower construction. For dynamic analysis a computational model in ANSYS software is created. Static analysis is performed by Scia Engineer software. Both of this software use finite element method. It is also focused on wind load determination by Eurocode 1, structural factor calculation, modal analysis and vortex shedding. Verification of selected parts according to Eurocodes is included.
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Dynamic analysis of an in-line arranged cylindrical chimney
Harazim, Petr ; Kanický, Viktor (referee) ; Salajka, Vlastislav (advisor)
The diploma thesis deals with the response of a steel smokestack structure to wind loads. A detailed computational model implementing the finite element method was created in accordance with the available drawing documentation. The new smokestack was placed next to an existing one, thus it can be assumed that these two structures will affect each other. The thesis also elaborates on the problems of aerodynamic and aeroelastic stability of the earlier smokestack; in particular, the occurrence of vortex shedding in resonance with eigenfrequency of the structure, with the use of the program ANSYS CFX. The evaluation of the structure includes survey of the strength and deflections of the structure. The calculations are in accordance with valid ČSN EN norms.
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Wind loads of building structures
Štěrba, Martin ; Kala, Jiří (referee) ; Hradil, Petr (advisor)
The bachelor thesis deals with the analysis of the effects of wind load on building structures. In the context of the work is solved the numerical modeling of flow around the solid cylindrical bodies at high Reynolds numbers. To the simulations has been used computational software ANSYS CFX. The outputs of the work are the values of Strouhal numbers and the values of drag and lift coefficient depending on the Reynolds number.
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Wind load on truss high-rise structures
Komárková, Petra ; Vlk, Zbyněk (referee) ; Nevařil, Aleš (advisor)
This Bachelor´s thesis concerns wind load effects on truss high-rise structure. The aim is to describe response of lattice tower on effects of mean wind load, fluctuations and vortex shedding action. Further problem includes an influence of rime on aerodynamic characteristics of profiles. The structure is performed by means of computing software ANSYS. In the theoretical part there are procedures describing how to determine load on structure and basic theory of calculation. Then the applied part follows the theoretical one and describes operations in ANSYS.
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