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Resistance of the roof structure loaded with photovoltaic panels
Holoubek, Jan ; Bažant,, Zdeněk (referee) ; Strnad, Jiří (advisor)
The aim of the thesis is to verify the resistance of the roof structure loaded with photovoltaic panels. On the roof of industrial building of rectangular plan with dimensions of 26,5 x 24,5 m in Hlinsko, the investor decided to install photovoltaic panels. Preliminary diagnostic survey showed only flexural reinforcement in the field of all considered load-bearing elements. Bending strength was assessed by these structural elements: reinforced concrete slab, reinforced concrete beam, reinforced concrete grinder. Static calculation includes a minimum reinforcement of support and necessary shear reinforcement, which must be demonstrated by a detailed diagnostic survey. The structural analysis includes the assessment of reinforced concrete beam deflection after loading. All assessments were performed according to currently valid Eurocodes. The calculation showed that all supporting elements meet the bending resistance and deflection of the beam is smaller than the limit value laid down in the EC, so the roof of the hall can be loaded with photovoltaic panels.
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Correlation analysis of optically trapped particle motion
Koudelníček, Karel ; Jákl,, Petr (referee) ; Harabiš, Vratislav (advisor)
This bachelor’s thesis deals with the description of random (Brownian) motion of microscopic particle trapped by optical trap. This thesis provides overview of possible usage in biology. The major part of the thesis is dedicated to description of methods that allow characterize optical trap with etc. stiffness thanks to the random motion. First, the estimation methods are tested on the simulated data. Before using these methods for real data, it was necessary to modify them, specifically to eliminate crosstalk and frequency noise. The differences in the estimation of the stiffness from the autocorrelation function and the power spectrum were described in the conclusion.
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Measurement of torsion bars and stabilizers
Bláha, David ; Vančura, Jan (referee) ; Blaťák, Ondřej (advisor)
This diploma thesis deals with the measurement of the anti-roll bar characteristics. The target of this thesis is to design a device for measuring of torsional stiffness of the automobile stabilizer bars, design a measuring sequence for detection values subsequently used to calculate the stiffness, and calculate the total measuring error. The measuring device is designed for the needs of the Institute of Automotive Engineering of FME BUT.
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Design of underground garage under the block of flats
Císařová, Kateřina ; Hrubý, Tomáš (referee) ; Klusáček, Ladislav (advisor)
As the main topic this thesis describes the design and evaluation of selected reinforced concrete members of the underground garage construction of the administration building at ultimate limit state and also at serviceability limit state, both in accordance with EC2: Design of Concrete Structures. Designed members in particular are monolithic slab, girders and columns. Structural design and evaluation of other structures of the building are not part of this thesis. The text part of the thesis concerns the descriptions of analysed structures and also the descriptions of the loads acting on them. Method of designing of the structures, methods of calculating of inner forces, and also the method of modelling the structure in software SCIA Engineer are herein further described. The annexes are mainly structural analysis, which expresses the knowledge obtained from the theoretical part of this thesis, and the drawing documentation.
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Manufacturing concept of a composite swing arm
Gregor, Lukáš ; Slaný, Martin (referee) ; Zouhar, Jan (advisor)
The subject of this master’s thesis is manufacturing design and production of CFRP swingarm prototype for off-road motorcycle. Theoretical part describes conventional types of swingarm, provides basic introduction to composites and manufacturing technologies. Practical part describes production steps, assembly jigs and assembly process. The last part of thesis deals with measuring stiffness properties using photogrammetry system TRITOP.
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Formula Student Steering System Design
Pospíšil, Jaromír ; Blaťák, Ondřej (referee) ; Ramík, Pavel (advisor)
This thesis describes the steering system parts, the most common used parts and rates their advantages and disadvantages. These findings are then transferred into the Formula Student steering system design. The thesis also presents procedures leading to determine load of steering system, which is taken into account in steering system design. The final version of steering system is analyzed of stiffness.
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Influence of changed shape and dimensions of a helical spring on its compression characteristic
Melichar, Marek ; Majer, Zdeněk (referee) ; Burša, Jiří (advisor)
The bachelor thesis deals with a change of a shape of a spring in order to facilitate its assembly in a gas boiler controller assembly. The introductory part deals with familiarization with the given issue. Then, based on the algorithm created in the bachelor thesis "Assessment of characteristic of a helical conus-shaped spring under compression" of Libor Loveček, the calculation program is adapted for calculating the existing conical spring and is further modified for other spring shapes. Accuracy of the created algorithms is verified by comparing the results with commercial computing programs. Based on the calculations, new shapes are designed, manufactured and experimentally tested. At the end of the thesis the possibility of usage of created alternative shapes is evaluated.
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Creation of database of stator core stiffness of rotational electrical machines
Podzemný, Zdeněk ; Donát, Martin (referee) ; Dušek, Daniel (advisor)
In this thesis is wrote up a complete procedure of stator core stiffness determination using finite element method (FEM), subsequently, the stator core stiffness database was created according to this procedure. In the next chapter is carried out a sensitivity analysis of one chosen stator core, which led to identifying parameters that affected its stiffness the most. Finally, a modal analysis of one synchronous machine was performed using FEM, in order to determine the effect of stator core stiffness on modal characteristics of the machine. Several modal shapes and corresponding natural frequencies were computed in this analysis, then only a few shapes with the highest core effect were chosen and compared.
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The analysis of track response to railway vehicles
Kopeček, Josef ; Plášek, Otto (referee) ; Salajka, Vlastislav (advisor)
The diploma thesis deals with the assembly of numerical models of classical track using the finite element method in several variants. Models are compared with results obtained on analytical models. More complex models simulate the real behavior of a track running on a railway vehicle. The purpose is created methodology of modeling the railway track for use in static and dynamic analysis.
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The analysis of boring process of automatic horizontal boring machine
Šohajek, Jiří ; Roubíček, Jiří (referee) ; Bradáč, František (advisor)
The object of this dissertation is to analyse a drilling process of an automatic horizontal boring machine the SVD2 for drilling of bearing holes. There were problems with vibrations during drilling process, causing an extreme noise and this dissertation solves them. First of all it was necessary to analyse the vibrations, to examine a machining process and measure machine dynamics and statics. Another task was to compare measured results with mathematical models and after their analysis to design structural and other solutions. The SVD2 machine was designed on the basis of a previous type the SVD. Its conversion to a new one was based on adding of six spindles. As a result a number of drilled bodies was increased from one to four, so a performance was increased four times. That is why there was an original intention to rebuilt the other two spindle machines. To leave the basical parts of the machine without any modification ( such as a reinforcement of a mount and adjusting of a bigger distance of a side linear spindle guideway and a cross linear guideway of a support for clamping devices), would be unsuitable solution, which was confirmed after a measurement and a following analysis.
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