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Comparision of FEM models of joints
Hlaváč, Martin ; Hrůza, Václav (referee) ; Pokorný, Přemysl (advisor)
This thesis deals with the comparison of alternative models of the simplified joints used in the FEM models of complex models with detailed joint details. This is essentially a screw connection with dowel bolt and standard bolt, weld connection "T" and overlap weld connection. Individual connections are compared in the simulation results of matching models.
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Replacement of headlamp parts screw fixation by a plastic nail
Lysa, Bohuslav ; Píška, Miroslav (referee) ; Polzer, Aleš (advisor)
The master thesis covers several issues linked to a substitution of headlamp screw fixation by a plastic nail. The thesis includes an analysis of the headlamp technology, including description of the prescribed durability tests. On the basis of the analysis some new designs of plastic nails are proposed, consistent with characteristics of plastic materials. Selected outcomes of the analysis have been tested as prototypes and verified with Finite Elements Method in SimDesigner including 3D modeling capabilities provided by the Catia V5. The feasibility study regarding a casting form of the new design of plastic nails and technical economic valuation for contingent assembly mounting is included in the thesis.
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Footbridge
Grussmann, Jan ; Straka, Bohumil (referee) ; Sýkora, Karel (advisor)
Master´s thesis deals with design and complex static assessment of timber roofed footbridge structural system. The calculation part is divided into three main chapters, that are dedicated to determine load impacts on structure, to particular structural and roof members assessment and also to design details of connections. The lower part of structure is formed by flat arched main beams of glued laminated timber, floor beams, stringers and under-deck bracing. The upper part of footbridge is formed by structure of gabled roof and additional bracings. Transversal frames of footbridge copy the shape of arch and they are arranged orthogonally to its axis. They form a radial fan with commom centre in the longitudinal direction. The static scheme of structure is thought as a statically undefinite system thanks to the bedrock surrounding the footbridge.
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Roof structure of construction for social purposes
Bašista, Ján ; Melcher, Jindřich (referee) ; Karmazínová, Marcela (advisor)
The work treats the static recalculation of an existing roof structure of a construction for social purposes and proposes two variants of the design of a new roof structure. The construction has a rectangular ground plan of 30 m x 47 m and the roof structure is placed on the load bearing circumference concrete walls. Except for the load constituted by the function of the construction and by the climatic area, an extra load of 2 tons suspended at any place of the structure is considered because of the special requirement of working and technological equipment. The variant no. 1 is designed from the steel S355. The variant no. 2 is designed as a combination of the wood GL24h and the aluminium EN-AW 5083. Both of the variants have 11 transverse load bearing girders. The purlins are perpendicular to the girders and are placed on them. Stiffness is secured by roof stiffeners.
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Calculation of heat and force field UniGear ZS1
Mokrý, Lukáš ; ABB, Drahomír Tůma, (referee) ; Dohnal, Petr (advisor)
The aim of my work is to describe high-voltage switchgear type UniGear 500R, which is part of UniGear switchgears family. I will focus on heating issue of one 500R unit and its parts during operation. Maximum values of this heating is limited by standards and can´t be exceed to ensure safe and reliable operation. That is why the heating tests are necessary part of designing and developing switchgears. Calculation will be made by two different ways. First is classic one-pole heating net method and second is numerical simulation in Solidworks flow simulation program. Except the theoretical description there will be presented also used 3D model and explanation of both method, used to calculation and simulation. Last point of this work is measuring of this type of switchgear and getting real data. The main point there is to compare measured values with values calculated and decide if is possible to simulate tests with appropriate accuracy. Then would be also possible to substitute the real test in laboratory, which costs many thousand crowns and takes lots hours of time. This work is collaborated with EJF division of ABB Company, where I am employed. Heating issues in this company is always on process, because of developing and improving of their products. So this work could be helpful in this field. ABB provides all materials needed, especially technical catalogues, 3D model and final values from laboratory measuring. Support from college faculty is mainly in study consultations and proposing of calculations making. In the end of work will be make final comparison and evaluation of achieved results.
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Design of the fixture for the clamping of the machined part
Pilař, Radek ; Kubík, Roman (referee) ; Strejček, Jan (advisor)
Bachelor’s thesis is focused on design for clamping of machined part on CNC machine EC-1600. Familiarization with issue, including a theory that is necessary for desing and manufactrure of the fixture. There are made design of options fixture, calculations of cutting forces, clamping forces, verification of safety and economic evaluation. The aim is to create the documentation that discusses all information regarding to a proposal fixture clamp of managment of the compandy OMNI-X CZ.
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The screw conveyor for transport of grain
Pernica, Marek ; Jonák, Martin (referee) ; Řezníček, Milan (advisor)
This bachelor thesis deals with constructional solution and proposal of skew screw conveyor for transport of grain. In thesis is carried out calculation of main parts of screw conveyor, proposal of engine, proposal of enshrinement of screw, solidity review of screw shaft and solidity review of trough. Drawing documentation contains general device draw, subassemblies of all bearing lengths and welding subassembly of trough.
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Plastic materials and their treatment
Kopečný, Aleš ; Zemčík, Oskar (referee) ; Osička, Karel (advisor)
This research the basic empirical knowledge about the processing of plastic materials. The following are analyzes of the nature of plastic materials and analysis of the use of these materials in the engineering industry. This paper deals with the technological methods of processing plastics. Specifically, it is done as a summary of information about the technologies needed for the production of molds for plastics. Key words
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Description and Evaluation of Fastener Torque Characteristics of Screw Connection
Větrovec, Ondřej ; Roupec, Jakub (referee) ; Brandejs, Jan (advisor)
This bachelor’s thesis deals with the description and evaluation of the torque characteristics of screw connection in plastic parts in headlight. The evaluation was compared with the same screws from three different suppliers. Compered was the course of torque when screwing. The work also includes analysis of the current state of knowledge in the use of plastics in the automotive industry and joining plastic parts. There is more emphasis on shaping joining screws.
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Connection accessories - past and present
LANG, Aleš
The theoretical part of the thesis focuses on the history and present selected fasteners. For the period of the first elements of fasteners, the development of mass production and standardization process follows the thread until today. In the practical part are present selected individual types of fasteners, their properties and uses. Individual elements of fasteners are classified according to the manner of their use.
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