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  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
1

Investigation of the deleterious effects on an instrument landing system localizer produced by scattering of radio frequency energy from a Bi-fold hangar door

Huntwork, Matthew E. January 1999 (has links)
No description available.
2

Ocelová konstrukce hangáru / Steel construction of a hangar

Plačková, Markéta January 2018 (has links)
This Master´s thesis describes the design and assessment of steel structure of a hangar located in Znojmo. The supporting structure of a hangar is 37,475 m span, 48 m lenght, clear hight at the highest point is 15,5 m. Main construction material is steel, grade S355J2. The supporting structure consist of a truss girders. The distance of each cross link sis 4 m. There is prepared statics calculation of the main load-bearing parts of the structure, including joints and details. The valid standards CSN EN were used in processing of this dissertation.
3

Pojezdové a zvedací zařízení / Travelling and lifting mechanism

Kukla, Antonín January 2010 (has links)
The main objective of the thesis is to design and construct a taxiway and a lifting device for moving a BELL helicopter with slides. Handling equipment is used for transporting helicopters between the airfield and hangars. The thesis is divided into several parts. The first part includes the design of taxiway and lifting equipment. Other parts contain strength calculation of selected parts and design documentation, which includes assembly drawings and important groups drawings.
4

Pojezdové a zvedací zařízení / Travelling and lifting mechanism

Folprecht, Michal January 2013 (has links)
The main goal this thesis is presenting solution for manipulation with chopper BELL between of hangar and landing zone. The main task is design useful construction solution by required task, also perform a strenght calculations each part of mechanism and drawing documentation. Also included is a 3D visualization of the entire mechanism.
5

Trocas gasosas e desidratação do capim Vaquero: valor nutricional no armazenamento de feno / Gas exchange and dehydration of Grass Vaquero: nutritional value hay storage

Machado, Ivaldir Willian Junior 28 February 2014 (has links)
Made available in DSpace on 2017-07-10T17:48:02Z (GMT). No. of bitstreams: 1 Ivaldir_Willian_Junior_Machado.pdf: 731803 bytes, checksum: d1256115f91e0fff92ddd0d2baf6db7b (MD5) Previous issue date: 2014-02-28 / Conselho Nacional de Desenvolvimento Científico e Tecnológico / Two experiments were conducted to evaluate the Vaquero grass destined to haymaking, one in summer and other in winter 2012. . In the summer experiment evaluated the dehydration curve of different plant parts (stem and blade + sheath), gas exchange during the first hours of dehydration, nutritional value and occurrence of fungi. The dehydration curve of grass Vaquero was determined in whole plant, leaf and stem + sheath in seven times. Time 0 corresponded to the sample taken before the court, held at 19:00 hours - daylight saving time (time 0), and on other days always 08.00, 13:00 and 17:00 hours. The times evaluted were at 0, 13, 18, 22, 37, 42 and 44 pm (moment of baling) after cutting. The experimental design for the dehydration curve was randomized blocks with split-plot in time with three regions of collection in the plant to determine the dry matter and seven times of collecting as a sub portion with five replications.. To determine gas exchange during dehydration of grass Vaquero evaluations were made on fully expanded leaves located in the upper middle third of each tillers before the cutting - 0 time (19:00), time 14 (9:00), time 19 (14:00). In a second step, was evaluated the nutritional value of grass Vaquero under two storage systems, using the experimental delineation in blocks randomized with split plot an additional treatment (before cutting). In a third step was performed the determination of fungi present in green plants and hay, where we collected samples of hay in moment of cutting , 30, 60 and 90 days of storage in open shed and enclosed shed. It was found that dehydration of the hay Vaquero occurred in 44 hours, is considered a optimal time for drying hay, with faster rates for leaf, and slower for stem. Gas exchanges were more intense before the cutting and 14 hours after cutting. The crude protein rates were higher at the time of cutting, decreasing with storage. The soluble carbohydrates decreased after 60 days of storage. The in vitro digestibility of dry matter was high and showed no reduction in both seasons and storage systems. There was no significant growth of fungi. In a second experiment, was characterized the dehydration curve of the vaquero grass in winter in different strata of the windrow (12 cm), the chemical composition and in vitro digestibility of dry matter of hay of grass Vaquero (Cynodon dactylon) stored at different times. The dehydration curve was characterized during a period of 0, 7, 21, 28, 42 and 49 hours after cutting, in 3 extracts (upper, middle and lower). The experimental design was adopted in randomized blocks with split plot in the time. Were evaluated the levels of crude protein, NDF, ADF, PIDA, NDIP and in vitro digestibility of dry matter of hay Vaquero before cutting and in storage. The experimental design was randomized blocks with seven sampling times and five reps. There was no difference in the different parts of the windrow of grass in dehydration. In response to the dehydration time, there was a linear increase in dry matter. The crude protein levels were elevated with an average grade of 137.00 g kg -1 and did not differ between sampling times. The levels NDF and ADF, with 14 days of storage were below than the others times. The contents of PIDA and NDIP showed no difference in moments reviews. The in vitro digestibility of dry matter a mean submitted an average content of 595.95 g kg-1, with at two sampling times / Foram realizados dois experimentos avaliando o capim Vaquero, destinado à produção de feno; um no verão e outro no inverno de 2012. No experimento de verão, avaliou-se a curva de desidratação de diferentes partes da planta (colmo e lâmina + bainha), trocas gasosas durante as primeiras horas de desidratação, valor nutricional e a ocorrência de fungos. A curva de desidratação do capim Vaquero foi determinada na planta inteira, folha e colmo + bainha em sete tempos. O tempo 0 correspondeu a amostra, retirada antes do corte, realizado às 19:00 horas horário de verão (tempo 0), e nos demais dias sempre as 08h00, 13:00 e 17:00 horas. Os tempos avaliados foram 0, 13, 18, 22, 37, 42 e 44 horas (momento do enfardamento) após o corte. O delineamento experimental para curva de desidratação foi em blocos ao acaso com parcelas subdivididas no tempo com três regiões de coleta na planta para determinação da matéria seca e sete tempos de coleta como sub parcela, com cinco repetições. Para determinar as trocas gasosas durante a desidratação do capim Vaquero foram feitas avaliações em folhas completamente expandidas, situadas no terço médio superior de cada perfilho antes do corte tempo 0 (18:30), tempo 14 (9:00), tempo 19 (14:00). Numa segunda etapa, avaliou-se o valor nutricional do capim Vaquero sob dois sistemas de armazenamento (galpão aberto e galpão fechado), utilizando o delineamento experimental em blocos casualizados com parcelas subdivididas no tempo com um tratamento adicional (antes do corte). Numa terceira etapa foi realizada a determinação dos fungos presentes nas plantas verdes e no feno, coletando-se amostras de feno no momento do corte, 30, 60 e 90 dias de armazenamento. Verificou-se que a desidratação do feno de capim Vaquero ocorreu em 44 horas, sendo considerado um tempo ideal para secagem de feno, com taxas mais rápidas para folha e mais lentas para colmo. As trocas gasosas foram mais intensas antes do corte e 14 horas após o corte. Os teores de proteína bruta foram superiores no momento do corte, reduzindo-se com o armazenamento. Os carboidratos solúveis apresentaram redução, após 60 dias de armazenamento. A digestibilidade in vitro da matéria seca mostrou-se elevada e não apresentou redução em nenhum dos períodos avaliados e sistemas de armazenamento. Não ocorreu crescimento significativo de fungos. Em um segundo experimento caracterizou-se a curva de desidratação do capim Vaqueiro no inverno em diferentes estratos da leira que apresentava altura de 12 cm, a composição bromatológica e a digestibilidade in vitro da matéria seca do feno de capim Vaquero (Cynodon dactylon) armazenado em diferentes tempos. A curva de desidratação foi caracterizada durante um período de 0, 7, 21, 28, 42 e 49 horas após o corte, em 3 estratos (superior, médio e inferior). Foram avaliados os teores de proteína bruta, FDN, FDA, PIDA, PIDN e digestibilidade in vitro da matéria seca do feno de capim Vaquero antes do corte e no armazenamento. O delineamento experimental utilizado foi em blocos casualizados com sete tempos de amostragem e cinco repetições. Não houve diferença nos diferentes pontos da leira de capim em desidratação. Em resposta ao tempo de desidratação, houve um aumento linear nos teores de matéria seca. Os teores de proteína bruta foram elevados com um teor médio de 137,00 g kg -1 e não apresentaram diferenças entre tempos de amostragem. Os teores de FDN e FDA, com 14 dias de armazenamento foram inferiores 724,00 e 338,20 g kg-1 respectivamente aos demais tempos. Os teores de PIDA e PIDN não apresentaram diferenças nos tempos avaliados. A digestibilidade in vitro da matéria seca apresentou um teor médio de 595,95 g kg-1. O capim vaqueiro pode ser utilizado para produção de feno tanto no verão quanto no inverno
6

Strength Analysis of Deployable Hangar

Rudani, Manan Sureshbhai, Ring, Hampus January 2021 (has links)
It is of interest to investigate extended usability of Saab’s Deployable Aircraft Maintenance facility(DAM) with respect to Eurocode standards. One of the features of the deployable hangar is that it shouldcomply with the structural strength standards for permanent buildings which requires compliance withEurocodes.Eurocodes are European standards which deals with the development of building and structural design.Compliance with Eurocodes works as a proof of requirement for mechanical strength, stability andsafety of structures. The Eurocodes were created by the European Committee for Standardization withthe intent to simplify technical obstacles and enable trade within Europe and elsewhere.The thesis has resulted in the creation of a Finite Element Model (FE-Model) of the deployable hangar,for which different loading combinations have been applied. From the FE-results, trade-off curves havebeen generated that show the effect that the different loading conditions have on the differentcomponents of the hangar. This is done for the current configuration of the hangar and for differentproduct variants. The analysis includes the effects of increased load levels.From the trade-off curves it is possible to see to what extent the hangar can withstand increased load.This is being measured with a Eurocode ratio. It has been found that the Eurocode ratio is directlydependent on increase of loads i.e. increased loads give a linear increase in Eurocode ratio for most ofthe components studied. The product variants consists of different lengths of the hangar. From the studyit has been found that adding or removing sections does not have a substantial effect on the strength ofthe hangar and the Eurocode ratio mostly remains constant. In addition the most critical componentshave been found and design suggestions have been proposed to improve the strength of the hangarwithin compliance with Eurocodes.
7

Ocelová konstrukce hangáru / The steel structure of a hangar

Bartel, Jan January 2012 (has links)
Object of this master´s thesis is the design of a hangar. Ground plan dimensions are 30x60m. Vertical cleareance is 11m, overall height is 15.3m. The structure is designed for the lokality of Ostrava. The structure is held by 60m long pipe tube truss of triangular shape. The main girdle is a tube 356x20mm. The truss girder is embedded on both sides on columns composed from HEB 300. There are trusses attached to this main girder each 6m
8

Hangár / Hangar

Matějková, Pavla January 2019 (has links)
Diploma thesis contains a design of steel load-bearing structure of a hangar placed in Brno-Medlánky. The ground dimensions are 40.0×44.0 m, the height of the building is 10.0 m. Two preliminary variants of the design solution were processed; main difference is the shape of the truss girder. Both variants were assessed for a combination of seventeen load cases. The comparison of the variants led to the selection of the final variant, which was assessed in detail. The girder truss in this variant is an arched truss, the height of the truss is 1.5 m, the individual elements are made of square hollow sections. A detailed static calculation was performed including the calculation of joints, drawing documentation and technical report. The main construction material is S235JR steel.
9

Pojezdové a zvedací zařízení / Travelling and lifting mechanism

Bernard, Vladislav January 2010 (has links)
The thesis deals the design and calculation of handling equipment designed for transport of Bell helicopter between the airport and hangar space. The first part contains an analysis of possible mechanisms applicable to the handling of the helicopter as well as an overview of the overall evaluation of some producers, engaged in the manufacture of this type of device. The second part presents the design, necessary calculations and drawing documentation. Handling equipment is designed for loading kapacity of 2000kg with a minimum 80 mm lift of helicopter to ensure safe transportation to the required distance.
10

Hangár / Hangar

Škatula, Václav January 2017 (has links)
The final thesis is focused on a project of a load bearing structure of a aircraft maintenance hangar that has a rectangular ground plan 60,0x120,0 m and includes suspended mobile hoist of loading capacity 5,0t. The object is situated in the airport area of Ostrava Mošnov. The task provides two versions of design. The first version consists of eleven traverse joining beams witch are distanced twelve meters from each other. The second version consists of thirteen traverse joining beams witch are distanced ten meters from each other. The thesis focuses on the load pressure of the steel construction, the main emphasis being placed on the single structural components and assembling components. The calculation meet the standards of ČSN EN.

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