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Assessment and evaluation of safety in power. machines
Hromek, Lukáš ; Janda, Marcel (referee) ; Veselka, František (advisor)
This thesis is focused on the security and improving of electrical rotating machines service life, especially asynchronous motors. Work includes a description of the most common disorders, short description of the asynchronous motor cage casting, analysis of provided decommissioned motors with photo documentation. The last part of this thesis is focused to vibrodiagnostic of asynchronous motor with simulated imbalance and motor emplacement by laser.
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Diagnostic of System Reliability
Bábek, Tomáš ; Pohl, Jan (referee) ; Havlíková, Marie (advisor)
This thesis is oriented to the reliability theory and diagnostics. It involves brief explanation of terms that exists in a branches of technical devices reliability. The next part contains determining the reliability indexes, calculations of probabilities and statistics for electronic devices. I do mention the different methods of reliability diagnostics. The three most used of them are described. First of them is the reliability block model. By this I describe the serial reliability model, the parallel reliability model and the combination of them. Using this method is the simple way to show how each component affects reliability of the whole system. The second method is FMEA (Failure Mode and Effects Analysis) which is used mostly in the begining of the system designing. The third method is FTA (Fault tree analysis) which is one of the classic deductive methods. The FTA method is a graphical reliability model of a given system. By the end of this thesis, process of calculating the failure probability and the other reliability indexes of a given komponent (preamplifier with operational amplifier) is shown.
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Evaluation of operation of small hydropower plant
Bartoš, Josef ; Dráb, Aleš (referee) ; Špano, Miroslav (advisor)
The bachelor's thesis deals with the quantitative expression of the reliability of operation at MVE. In the introduction, the work deals with the theoretical part, especially a more detailed description of individual indicators and mathematical expression of these indicators. The following is a description of the power plant, which is divided into individual parts. Furthermore, the evaluation is presented, which is based mainly on the theoretical part and the results are displayed, among other things, in graphical form.
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Providing measured documentation of existing structural and technical conditions of a town house in Havlíčkův Brod
Juklová, Sandra ; Chládek, Libor (referee) ; Šmahel, Milan (advisor)
The objective of this thesis is passportisation of the construction and technical condition of s of a townhouse in Havlíčkův Brod. Primarily to proof, draw and assess the condition of this townhouse suggest some appropriate solution. The next step is to aim, draw and design the building modernization while preserving its external character. The building layout and construction is part of the project. The layout places emphasis mainly on the building functionality and operation. Another aim of this project is to point out the construction and technical condition of the building and to find possible solutions to the problem. The thesis includes also a budget which puts a monetary value on the costs of the building reconstruction. The partial aim of this thesis is to propose possible modernization.
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Identification and detection of defects on the PV system - operational measurement
Leitman, Valentín ; Morávek, Jan (referee) ; Mastný, Petr (advisor)
This work deals with the problem of identifying and detecting faults in photovoltaic systems. This thesis includes theoretical knowledge related to photovoltaic panels, the definition of measured parameters of the PV system and five ways how to identify faults in PV systems. The last part of this bachelor thesis deals with the author's contribution, which is to introduce a system for continuous monitoring data. System for continuous monitoring of data consists of measuring the power output of a photovoltaic panel and measurement using optical diagnostics using thermal camera. In conclusion are summarized individual knowledge, evaluation and recommendation of appropriate measurement methods for the detection of faults in PV systems.
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Reduction prices house in Lelekovice as a result of defects or faults.
Faltusová, Veronika ; Uhlová, Eva (referee) ; Weigel, Lubomír (advisor)
This thesis deals with the issue of determining the causes of defects and failures, focusing on a specific property and their significance in determining the price of the property. The first part focuses on the theory explaining the basic concepts used in the valuation of real estate, basic methods of property valuation and classification of construction defects and failures. This chapter includes an analysis of the real estate market in the years 2008 - 2013. The second part is devoted to determining the amount of property damage at a specific property, the calculation of this particular property which is based on technical surveys and subsequent valuation of the property with regard to the results of the survey. The aim is to create a design procedure for reducing the price of the property with the defect.
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Effects of Defects on Composite Structures Load Carrying Capacity: Delaminations at a Bi-Material Interface
Matěják, Vladimír ; Kotoul, Michal (referee) ; Růžička, Milan (referee) ; Juračka, Jaroslav (advisor)
Kompozitní materiály se projevují komplexním způsobem porušování, které může být dále ovlivněno přítomností různých poruch plynoucích z výrobních processů nebo se vyskytujících v průběhu života součásti. Důkladné porozmění procesů porušování a jejich okolností je nezbytné pro navrhování kompozitních konstrukcí, jenž budou bezpečnější, trvanlivější a ekonomičtější. V první části disertační práce jsou popsány způsoby porušování kompozitů a uvedeny současné matematické metody pro analýzu a výpočet únosnosti. Dále jsou zde vyjmenovány hlavní druhy vad a stručně diskutován jejich vliv na vlastnosti kompozitních materiálů. Zvláštní důraz je kladen na delaminace, společně se základními principy lomové mechaniky a jejich uplatnění při výpočtech a zkoušení kompozitů. Druhá část je zaměřena na delaminace na rozhranní dvou různých materialů. Lomová houževnatost byla experimantálně měřena ve třech typech zatížení za účelem stanovení poruchového kritéria založeného na podílu módu I a módu II. Během tohoto experimentu byla vyvinuta nová metoda měření délky trhliny pomocí digitáního zpracování obrazu a rovněž byla navržena nová definice počátku šíření trhliny. Analytické vztahy pro výpočet míry uvolnění deformační energie z naměřených dat byly rozšířeny o vliv rozdílných elastické parametrů materiálů na rozhranní. Podrobnější prozkoumání analytických vztahů a výpočet metodou konečných prvků odhalil, že podíl módu I a módu II je závislý na vzdálenosti od čela trhliny a poruchové kritérium založené na podílu smíšenosti tak nemůže být použito.
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Inspection of the implementation of reinforced concrete structures
Juráň, David ; Vymazal, Tomáš (referee) ; Cikrle, Petr (advisor)
This diploma thesis deals with the control of the implementation of reinforced concrete structures. The theoretical part deals with the issues of this theme. There are presented individual work processes of the implementation of reinforced concrete structures, accesses of valid standards, used diagnostic methods and also inspection and test plans for cast-in-place reinforced concrete structure. The practical part is divided into three chapters. The first chapter applies with the most frequent defects in new reinforced concrete structures and two remaining chapters with the inspection of newly built structures for which arose misgivings about the quality of execution.
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The Architectural and Engineering Research of the Building Construction
Slavětínský, Šimon ; Heřmánková, Věra (referee) ; Anton, Ondřej (advisor)
The subject of this bachelor thesis is the diagnostic survey of the arch railway bridge, which is situated in city called Hulín at the Railroad between Kojetín – Valašské Meziříčí in 16,019 kilometer. The thesis contains description of construction and technological survey and diagnostic methods, which includes evaluation of essential characteristics of masonry structures. The practical part contains processing of diagnostic survey. Its result is determination of material characteristics of the structure.
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