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Usable properties of plastic and aluminium windows installed in the building
Gabriel, Jindřich ; Skříček, Darek (referee) ; Šťastník, Stanislav (advisor)
The bachelor thesis deals with the thermal insulation of individual parts of doors and windows made of aluminium and plastic profiles. At the same time, the manufacturing processes for the production of these openings of the building structures are described. In addition, the requirements for placing the product on the market and the assessment of utility properties according to the currently valid standards are summarized. Contemporary profiles, insulating glass, spacing frames, window and door fittings and thermal treatments are also described. The practical part of the bachelor thesis is devoted to the determination of the temperature distribution, the temperature gradient and the distribution of the heat flows on the selected window type for four different ways of incorporation into the building structure. In conclusion, all the findings are summarized and a discussion about the achieved results is made.
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High-lift system of the competition model aircraft
Vrba, Martin ; Koštial, Rostislav (referee) ; Koutník, Tomáš (advisor)
This Bachelor thesis is focused on compiling a summary of lift mechanization, at both the leading and the trailing edges used on plane models and unmanned means of transport. It briefly explains their principles and functions. It describes the method of calculation of the flight mode design of the competing aircraft according to the specifications of the Air Cargo Challenge competition.
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Dependence of the handball game result on quantity and efficiency of shots from wing position area
Petružela, Jan ; Tůma, Martin (advisor) ; Buzek, Mario (referee)
Title: Dependence of the handball game result on quantity and efficiency of shots from wing position area Objectives: Main objective of this thesis was to determine dependence of the handball game result on quantity and efficiency of shots from wing position area. Next subject of research was to compare average values of both, quantity and efficiancy, of winning and loosing teams. Methods: statistical analysis, average value, comparison of average value Results: It was found out, that results of handball games shows possitive dependance on quantity and efficiancy of shots from wing position area. Results of evarege value of quantity and efficiancy on winning team are greater than average values on loosing team (excluded only the quantity in games between teams to be ranked on place 1-6). Key words: wing position, quantity, efficiency, game result dependence
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Rehearsal of shooting from the wing position in handball
Petružela, Jan ; Tůma, Martin (advisor) ; Kočíb, Tomáš (referee)
Title: Rehearsal of shooting from the wing position in handball Objectives: The aim of the work was to build and verify the training model for practicing and perfecting the shooting technique from the the wing position in handball. Based on the comparison and evaluation of each videoclip (before and after the intervention) five players tested, we found that this training model is effective. Methods: Five respondents players will be filmed during the shooting from the wing position, then the players go through during the months June and July seven training units, in the length thirty minutes, focusing on the progress of technique. After the completion of the training units, players will be filmed again and the videoclips will be compared with the original assessman. Results: In monitored group, a programme we have created caused a qualitative improvement the skills of all players. Key words: Wing, training, performance, intervention programme
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Insect wings vein analysis
Khodos, Anton ; Bída, Michal (advisor) ; Bošanský, Branislav (referee)
Insect wings are extremely important part of insect identification. Each wing possesses a number of longitudinal veins, which often have cross-connections called junctions and form closed cells on the membrane. Those wing features are unique inside most of the insect families. Therefore, entomologists use those features for insect identification. The purpose of this thesis is to develop software that will ease the process of extraction wing features from image. The software provides tools for manual and automatic extraction of wing features. Development also includes implementation of image processing algorithms: adaptive thresholding and Zhang-Suen thinning algorithm. Chosen solution is tested and the test results are analyzed and discussed. Powered by TCPDF (www.tcpdf.org)
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Overview of means for reducing induced drag
Mazánek, Adam ; Švec, Michal (referee) ; Daněk, Vladimír (advisor)
This bachelor thesis deals with the creation of overview of means for reducing induced drag on the wing of an airplane. It describes production of the induced drag and how it changes during a flight. The bachelor thesis also deals with geometrical modifications of the wing. The most extensive part is devoted to structural modifications of wing tips with special aiming on winglets.
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Time minimization for vehicles passing a given trajectory
Suja, Jerguš ; Kůdela, Jakub (referee) ; Porteš, Petr (advisor)
This bachelor’s thesis deals with model building of automobile movement and it’s optimal speed in every single point of trajectory, whit aim on minimal lap time. It uses a real data, which was measured on Masaryk circuit in Brno. Contents of thesis are analysing effecting forces on vehicle’s dynamic and then building mathematic model. The main purpose is finding optimal speed characterization and compare with real data. Then, we modify model with adjustable wing and present advantage of this customization. Simulation was done by program MATLAB.
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Design and functional morphology of insect wings
Jechová, Kateřina ; Prokop, Jakub (advisor) ; Janšta, Petr (referee)
Animal fly ability is undoubtedly one of the biggest innovation in evolution that allow animals to settle down another space on the Earth - the air. However, there are significant impacts on the other organisms during the evolution, too. The insect is single group of invertebrates with abilities to fly and because of that it became the most diversified group of organisms. There are a couple of theories about origin of the insect wings. Two major hypotheses considering the recent insects with their fossil record are widely known. Nevertheless, there is no direct clue to the first Pterygota due to the discontinuity of fossil record in the initial phase of their evolution The wing is very complex and unique structure throughout organisms. Insects became very good fliers during the evolution and wings are also used to protect of the body, carrying sensory organs, etc. Nevertheless, only very few insect species are well explored in term of flight and, an open theme for future studies. Aim of the present work is to describe the significance of the wing and to briefly review its morphological and design properties. Key words: Insecta, Pterygota, wing, venation, morphology, flight, evolution.
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New Approaches in Numerical Aeroelasticity Applied in Aerodynamic Optimization of Elastic Wing
Navrátil, Jan ; Slavík, Svatomír (referee) ; Komárek,, Martin (referee) ; Hlinka, Jiří (advisor)
Aeroelasticita je nezbytná vědní disciplína zahrnuta do návrhu letounů. Zaměřuje se na předpovídání jevů, které vznikají vlivem interakce aerodynamických, elastických a setrvačných sil. Tyto jevy často vedou ke katastrofickým následkům, proto musí být prokázáno, že nevzniknou v rozsahu rychlostí ohraničujících letovou obálku. Aplikace moderních materiálů při konstrukci draku, spolu se snahou navrhnout aerodynamicky efektivní tvar křídel, vede ke zvyšování poddajnosti letounů. To má za následek změnu aerodynamických vlastností a také k výraznějšímu vliv na aeroelastické jevy, které mohou být vyvolány snadněji vlivem pohybů tuhého tělesa než v případě tužších konstrukcí. Aeroelastické jevy mohou vznikat v širokém rozsahu rychlostí zahrnujícím i transsonickou oblast. V této oblasti je ovlivněna zejména rychlost, při níž dochází k třepetání, a to vlivem nelineárních jevů v proudu. Běžné nástroje, které jsou založeny na lineárních teoriích, nejsou schopny tyto nelineární jevy popsat. Cílem práce je proto navrhnout, implementovat a otestovat nástroj pro výpočetní (numerickou) simulaci aeroelasticity. Nástroj má využívat řešič proudového pole, který je schopen předpovědět nelineární jevy. V práci je kladen důraz na simulaci statické aeroelasticity. V práci jsou popsány metody, které je nutno zahrnout do numerické simulace statické aeroelasticity. Dále je popsán vlastní nástroj a je provedeno zhodnocení konvergence statických aeroelastických výpočtů. Funkčnost nástroje byla ověřena na příkladech, kdy byly použity různé aerodynamické a strukturální modely. Nástroj byl také aplikován při aerodynamické tvarové optimalizaci poddajného křídla. Výsledky optimalizace a její výpočetní náročnost byly porovnány s případem optimalizace tuhého křídla. Na závěr je v práci prezentován příspěvek autora do výzkumu zaměřeného na zhodnocení vlivu časové synchronizace mezi CFD a CSM řešiči. Použitý testovací případ je transsonické obtékání křídla na začátku třepetání (flutteru). Výsledky byly srovnány s experimentálními daty poskytnutými NASA.
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Wing system design of competition aircraft
Mahdal, Vít ; Hájek, Tomáš (referee) ; Katrňák, Tomáš (advisor)
This bachelor’s thesis deals with the wing system design of competition aircraft. The thesis consists of five main parts. The first part is an introduction to the competition – Air Cargo Challenge, and the mission of UAV. The second part details the compilation of flight envelope and loads acting on the aircraft. Part three describes stress analysis of the old fabric method of wing construction. Part four of the thesis gives suggestions of a new wing system design, and its stress analysis. The final part of this bachelor’s thesis describes the advantages and disadvantages of the new system design, and compares them to the old version.
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