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Dewatering of foundation pit - numerical analysis
Krejzar, Vojtěch ; Boštík, Jiří (referee) ; Miča, Lumír (advisor)
The subject of the presented thesis is a foundation pit dewatering numerical analysis. The study is introduced with practical examples and the summary of the necessary theory. Individual subtasks are modeled as two or three-dimensional problem on a chosen foundation pit example. A comparison with analytical methods and theoretical knowledge about the problem is made. The studies focus on specifying the pumped water quantity, the shape of the depression curve, determining the size of the numerical model and the influence of the finite element network density. The steady-state flow cases, water table aquifer, a well system, sheet pile wall cutoff effect, surface drained pit and partial penetration cases are analyzed. The work proposes a method of modeling a well by FEM. The main output is a 3D analysis of a submerged excavation dewatered with a partially penetrated well system.
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Vehicle Hydropneumatic Unit
Koudelka, Roman ; Hejtmánek, Petr (referee) ; Blaťák, Ondřej (advisor)
This diploma thesis, following the bachelor's thesis, is devoted to the gas-liquid unit of a vehicle, as the central element of hydropneumatic suspension. The aim is to dimension and construct this component and integrate it together with other elements into a complex suspension system. Based on possible forms listed in the research section, regarding to current development trends, the form of the unit is chosen. The practical part begins with simulations comparing a hydropneumatic with a conventional suspension system. After solving this issue, it is possible to proceed to the dimensioning of the basic parameters of the unit and then to its construction, respecting the relevant strength calculations. The last step is to build a conceptual design of the whole hydropneumatic suspension system.
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Design of pneumatic - hydraulic press
Tůma, Vladimír ; Vetiška, Jan (referee) ; Pavlík, Jan (advisor)
The goal of this bachelor thesis is to design a small pneumatic-hydraulic press for the widest possible workshop and car repair shop usage. The beginning of the paper is devoted to general facts and other useful information regarding the topic, the principles of hydraulics and a research of the current domestic as well as foreign market. In the main part of the paper, several possibilities of solutions as well as the design of the press itself with all required parameters including the computational and drawing documentation are discussed. The processes of production, assembly and overall commissioning of the machine are also incorporated in the paper.
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Design of mini backhoe
Vorlíček, Vít ; Kašpárek, Jaroslav (referee) ; Škopán, Miroslav (advisor)
The aim of the bachelor thesis is to design a small tractor backhoe and aggregate it into a three-point suspension system with a maximum tearing force of at least 20 KN. This thesis is divided into six chapters and it deals with the division of excavator equipment, parts of excavation and analysis of competition, alternatives of design solution, design of own concept, functional calculations and strength calculations.
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Analysis of structures of compact hydraulic equipment
Sordyl, Martin ; Pokorný, Jan (referee) ; Pokorný, Přemysl (advisor)
The subject of this thesis is realization of short research of current compact hydraulic power unit, realization of FEM analysis with aim to find inappropriately dimensioned parts of structures. Based on this data design optimized solution of structures and create drawings of weldments. This thesis is carried out in cooperation with company Bosch Rexroth, spol.s.r.o.
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Piping systems for district heating
Malach, Tomáš ; Horák, Petr (referee) ; Hirš, Jiří (advisor)
In the first part of master thesis is presented general introduction to district heating system (DHS) and hydraulic calculation for DHS. The next part deals with analysis operation of DHS and the pressure diagram for certain time interval. Subsequently, the thermohydraulic characteristics for the hydraulic main branch (comparing manual calculation with software calculation) and also the selected thermal and hydraulic characteristics for the whole DHS are shown. The last part is focused on the determination of the amount of heat supplied based on the ultrasonic flowmeter and the temperature probes. Subsequently, the computer simulation is also carried out, aiming at approximating the real heat supply from heat source to solved thermal network in winter.
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Double drum synchronized control of hydraulic vibratory roller ARP95
Novák, Martin ; Rada, Zdeněk (referee) ; Klas, Roman (advisor)
This thesis presents solution of synchronized two smooth drum steering of tandem vibratory roller ARP 95. During the development of this machine was found insufficient synchronization of two drums. The above-described problem was solved by modifying the steering block. The correct evaluation of data measurement and understanding of the machine behaviour led to elimination of the problem. The main result of this thesis is elimination of unsynchronized behavior of two drums. Thanks to this was achieved maximum deviation between two drums 0,2°. Synchronized steering is very important for modifying the surface of the asphalt roads around the sidewalks and currently the machine ARP 95 produced by AMMANN is the top of the market when it comes to the synchronized steering.
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Actions on bridges caused by the water flow and floating items
Řezník, Jindřich ; Duchan, David (referee) ; Špano, Miroslav (advisor)
The subject of this thesis is the enumeration and analysis methods applicable to the calculation of loads on bridges from water and water-borne objects. It involves a hydrodynamics loads, loads from captured debris and from impacts of the individual water-borne objects and their clusters. It includes an assessment of the current situation, the teoretical analysis and model calculations on the concrete bridge with the evaluation of usable methods.
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