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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.
21

Numerický model spoje s využitím lana jako spojovacího prostředku

Kuchař, Martin January 2016 (has links)
This thesis acquaint readers with typology of rope lashings including possibilities of their use. Two the most used types of lashings - square and shear lashing - were experimentally tested. A numerical model of these lashings in many variants was defined and analyzed, based on the tests. Selected results of tests and numerical analyses were evaluated and compared. At the end of the thesis the basic principles of lashings use are formulated.
22

Vliv vysokofrekvenční elektromagnetické energie mikrovlnného pásma na strukturu dřeva a na vybrané fyzikální a mechanické vlastnosti dřeva

Nasswettrová, Andrea January 2011 (has links)
No description available.
23

Porovnání výnosové schopnosti jarních odrůd pšenice / The comparison of spring wheat yield ability

KŘIVAN, Václav January 2017 (has links)
This diploma thesis Comparison of yield capacity of spring wheat varieties deals with small-scale experiments of three varieties (Astrid, Epos, Tercie) in two vegetation periods. Repetition variations were established in 2015 and 2016 on the school grounds of the Agricultural Faculty of the University of South Bohemia in České Budějovice. During two growing seasons the production of yield elements (the number of plants and the number of fertile crops - ears) was monitored for all varieties and after harvest other yield elements were evaluated the number of grains in the ear and weight of a thousand grains. Actual revenue was determined. Grain analysis determined the bulk density as a quality indicator. In the results and discussion the individual yield elements are described and statistically evaluated. The number of plants was better in 2015 regarding soil density characteristics. The number of fertile offsprings was the highest in the case of Astrid variety in the first production year (642). The number of grains in the ear was very variable for all observed varieties, both production years 2015 and 2016 (from 15 grains in the ear to 68 grains in the ear). Total actual yield was higher in 2015 than in 2016 (by 1.1 t.ha-1). Each spring wheat is characterized by its shorter growing season, during which it must optimally produce the highest yield possible and therefore needs adequate responsible care.
24

Stanovení modálních charakteristik celokompozitového křídla s využitím MKP metod / Determination of modal characteristics of composite wings using FEM

Churý, Tomáš Unknown Date (has links)
The diploma thesis deals with the creation of a detail FEM model all-composite wing of glider. Reduction created FEM model of the beam model. The models are calculated natural frequencies, vibration shapes wings and then subsequently compared the results of analyzes of both models.
25

Konstrukční modifikace přívěsu na balíky / Design modifications of the trailer to the balers

Straka, David Unknown Date (has links)
The purpose of this thesis is to calculate strenght of materials used in bale trailer and it's construction modifications. This work presents the design of new frame construction. After that the frame is checked via the finite elements method.
26

Studium asymptotických vlastností zrnitých materiálů pomocí metody oddělených prvků / Study of the asymptotic properties of granular materials using discrete element method

Jerman, Jan January 2016 (has links)
No description available.
27

Projekční metoda aplikovaná na modelování proudění krve v mozkových aneuryzmatech / Projection method applied to modelling blood flow in cerebral aneurysm

Hrnčíř, Jakub January 2016 (has links)
This thesis is motivated by a problem of cerebral aneurysms, which are abnormal bulges on the arteries which supply blood for our brain. These aneurysms can rupture and cause death or permanent neurological deficits. To study the evolution of aneurysms and assess the risk of rupture, mathematical modelling might be used to compute otherwise unobtainable information about blood flow inside the aneurysm. For this reason it is essential to be able to model blood flow in sufficiently high resolution. A goal of this thesis was to implement standard projection method for the solution of unsteady incompressible Navier-Stokes equations using the free finite element software FEniCS to create a working code adjusted to the need of this particular application. The incremental pressure correction scheme was chosen. Various shortcomings of this method are described and a proper choice of boundary conditions and other implementation issues are discussed. A comparison of computed important hemodynamic indicator wall shear stress using new and previously used solution approach are compared. A test of the new code for parallel efficiency and performance on finer meshes for a real medical case was conducted. Powered by TCPDF (www.tcpdf.org)
28

Výpočtová simulace rovnání trubek / Computational simulation of leveling of pipes

Peter, Ondřej January 2017 (has links)
The master thesis deals with the computational simulation of cross-roll leveling of tubes with various degrees of thickness. Based on the Lagrange approach, a several FEM models of curved tube were developed and subsequently solved in ANSYS commercial software. Furthermore, a several models of curved tube were solved by algorithm based on the Euler approach created at UMTMB FME BUT. Based on the comparison of output parameters from both algorithms it was found that the output parameters are comparable to the d/D ratio (inner/outer diameter of the tube) = 0.43.
29

Statická a dynamická analýza mostní konstrukce / Static and dynamic analysis of bridge construction

Čáslavová, Sandra January 2018 (has links)
The aim of this thesis is to conduct static and dynamic computations for selected bridge in the Moravian region, specificaly in the surroundings of Olomouc. All calculations will be made by selected software and verified by manual reckon. The bridge is intended for pedestrian traffic and connects left and right side of the river underneath.
30

Simulace mazání bodových kontaktů metodou konečných prvků / Simulation of point contact lubrication by finite element method

Hrdonka, Štěpán January 2018 (has links)
This diploma thesis is concerned with simulation of elastohydrodynamic lubrication of point contacts using the finite element method. The first part of the thesis focuses on the study of the issue and introduces equations for model creation and numerical methods which can be used for EHD calculation. The most suitable solution approach has been chosen from the overview, namely the Full system approach. The software we chose for applying the method was COMSOL Multyphysics. The following part of the thesis deals with model’s creation and gives its elaborate description. We introduce models for calculation of line and point EHD lubrication for newtonian lubricants and, last but not least, we also present a model for calculation of point contact EHD lubrication for non-newtonian lubricants. The next part of the thesis then verifies all the models. That is achieved by comparing the calculated results to results from different papers. The conclusive part of the thesis then examines the matches of acquired results to different prediction relationships and experiments.

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