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Dissertations / Theses on the topic 'Metoda FDM'

Author: Grafiati
Published: 28 June 2021
Last updated: 27 April 2022

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1

Strnad, Jiří. "Návrh malé multifunkční modelářské CNC frézky." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2021. http://www.nusl.cz/ntk/nusl-444277.

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This diploma thesis deals with the construction proposal of a small multifunctional modeller CNC milling machine that enables milling of aluminium alloys and 3D printing using the FDM method. Based on the research, analyzes and defined entry requirements the construction proposal is created and verified by calculations. The thesis contains a description of all the construction parts including the printhead, the tool tray and the safety cover. The other part of the thesis describes the machine geometry adjustment and specifies the choice of control system. The thesis includes a 3D model and the
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2

Quan, Liang. "Using FDM and FEM to simulate the decarburization in AISI 1074 during heat processing and its impact." Diss., Georgia Institute of Technology, 2011. http://hdl.handle.net/1853/44769.

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The metallurgical processes and the products developed from these processes have been the cornerstone on which our civilizations have developed and flourished. Many of the new materials that have been developed over centuries were often the result of serendipitous occurrences. Because of the importance of new materials to the improvement of society, it is necessary to accelerate the way in which new alloys and processes are designed, developed and implemented. Over the last two decades the computational side of materials science has thrived as a result of bigger and faster computers. Howe
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Dostál, Tomáš. "Návrh ražby a primárního ostění tunelu na stavbě vysokorychlostního železničního spojení." Master's thesis, Vysoké učení technické v Brně. Fakulta stavební, 2020. http://www.nusl.cz/ntk/nusl-409747.

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As part of modernization of the Brno-Přerov railway line, is in the section between village Blažovice and town Vyškov desined tunnel composed of two monorail tubes about 640 meters length. Tubes are situated in neogenic clay with an overburden height of 11 meters. This master thesis deals with design suitable tunnel exavation, primary lining with static calculation and geotechnical monitoring.
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Kosour, Vojtěch. "Technologie rychlého prototypování za použití metody FDM a současně technologie vytavitelného modelu." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2008. http://www.nusl.cz/ntk/nusl-228152.

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An overview of the development of the Investment Casting market and Rapid Prototyping equipment is given in the introductory part of this diploma thesis. Basic methods of rapid prototyping and the FDM method are futher described in detail. The FDM method is consequently used in the practical part of this work for the preparation of the silicon mould. The largest part deals with the issue of the simulation of pouring process of wax into the silicon mould. A characteristics of the casting wax is made; the parametres, which are inserted into the simulation software ProCAST and the possibilities o
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Smrčka, Václav. "Technologie rychlého prototypování za použití metody FDM a současně technologie vytavitelného modelu." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2008. http://www.nusl.cz/ntk/nusl-228153.

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Determining accuracy of wax patterns is an important in wide implementing rapid prototyping methods in investment casting. This experiment is comparing wax pattern accuracy produced in classical metal die and silicone mould. It has been found out, that wax patterns produced by the silicone mould are ounly about one or two accuracy steps worse then wax patterns produced by classical metal die.
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6

Kleditzsch, Stefan, and Birgit Awiszus. "Modeling of Cylindrical Flow Forming Processes with Numerical and Elementary Methods." Universitätsbibliothek Chemnitz, 2012. http://nbn-resolving.de/urn:nbn:de:bsz:ch1-qucosa-97124.

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With flow forming – an incremental forming process – the final geometry of a component is achieved by a multitude of minor sequential forming steps. Due to this incremental characteristic associated with the variable application of the tools and kinematic shape forming, it is mainly suitable for small and medium quantities. For the extensive use of the process it is necessary to have appropriate simulation tools. While the Finite-Element-Analysis (FEA) is an acknowledged simulation tool for the modeling and optimization of forming technology, the use of FEA for the incremental forming processe
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7

Beuchler, Sven. "Wavelet preconditioners for the p-version of the fem." Universitätsbibliothek Chemnitz, 2006. http://nbn-resolving.de/urn:nbn:de:swb:ch1-200600607.

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In this paper, we consider domain decomposition preconditioners for a system of linear algebraic equations arising from the <i>p</i>-version of the fem. We propose several multi-level preconditioners for the Dirichlet problems in the sub-domains in two and three dimensions. It is proved that the condition number of the preconditioned system is bounded by a constant independent of the polynomial degree. The proof uses interpretations of the <i>p</i>-version element stiffness matrix and mass matrix on [-1,1] as <i>h</i>-version stiffness matrix and weighted mass matrix. The analysis requires wav
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Eibner, Tino, and Jens Markus Melenk. "A local error analysis of the boundary concentrated FEM." Universitätsbibliothek Chemnitz, 2006. http://nbn-resolving.de/urn:nbn:de:swb:ch1-200601440.

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The boundary concentrated finite element method is a variant of the hp-version of the FEM that is particularly suited for the numerical treatment of elliptic boundary value problems with smooth coefficients and boundary conditions with low regularity or non-smooth geometries. In this paper we consider the case of the discretization of a Dirichlet problem with exact solution $u \in H^{1+\delta}(\Omega)$ and investigate the local error in various norms. We show that for a $\beta > 0$ these norms behave as $O(N^{−\delta−\beta})$, where $N$ denotes the dimension of the underlying finit
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9

Karlsson, Christian. "A comparison of two multilevel Schur preconditioners for adaptive FEM." Thesis, Uppsala universitet, Avdelningen för beräkningsvetenskap, 2014. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-219939.

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There are several algorithms for solving the linear system of equations that arise from the finite element method with linear or near-linear computational complexity. One way is to find an approximation of the stiffness matrix that is such that it can be used in a preconditioned conjugate residual method, that is, a preconditioner to the stiffness matrix. We have studied two preconditioners for the conjugate residual method, both based on writing the stiffness matrix in block form, factorising it and then approximating the Schur complement block to get a preconditioner. We have studied the sta
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10

Churý, Tomáš. "Stanovení modálních charakteristik celokompozitového křídla s využitím MKP metod." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2015. http://www.nusl.cz/ntk/nusl-232093.

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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.
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11

Holsten, Sven. "FEM-unterstützte Parameterstudie des Innengewinde-Fertigungsverfahrens Gewindefurchen." Kassel : Kassel Univ. Press, 2005. http://deposit.d-nb.de/cgi-bin/dokserv?idn=981992331.

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Marklund, Erika. "Kreativa metoders funktion i grupphandledning : En intervjustudie med fem handledare." Thesis, Högskolan i Gävle, Pedagogik, 2020. http://urn.kb.se/resolve?urn=urn:nbn:se:hig:diva-31406.

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Denna undersökning syftar till att belysa hur några erfarna handledare resonerar kring kreativa metoders funktion vid grupphandledning. Tidigare forskning visar att kreativa metoder effektiviserar handledningen, hjälper de handledda att få tillgång till sina inre resurser, stärker gruppsammanhållning, möjliggör perspektivbyte, samt stärker reflektion genom att man tränar handling. Dessutom sker en metodutveckling. I bakgrunden presenteras systemteori och grupputvecklingsteori samt en presentation av grupphandledningens funktioner inom svensk skola. Studien består av fem semistrukturerade inter
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Alsuleimanagha, Zaid, and Jing Liang. "Dynamic analysis of the Baozhusi dam using FEM." Thesis, KTH, Mark- och vattenteknik (flyttat 20130630), 2012. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-171817.

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High magnitude earthquakes have devastating effects that leads to severe human and material losses; when affecting concrete gravity dams, seisms devastate the surrounding habitat through sudden release of reservoir. Dam safety is therefore a significant issue to be accounted in order to prevent the failure of dams located in seismic regions. The Baozhusi dam, the case study of this thesis, was exposed to 8.0 Ms (at the Mercalli scale) Wenchuan earthquake 2008 with intensity of (0.148 g) at the dam site. The earthquake intensity exceeded the design level of the dam (0.1 g); yet, the Baozhusi da
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14

Peter, Ondřej. "Výpočtová simulace rovnání trubek." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2017. http://www.nusl.cz/ntk/nusl-318738.

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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.
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Eibner, Tino, and Jens Markus Melenk. "Multilevel preconditioning for the boundary concentrated hp-FEM." Universitätsbibliothek Chemnitz, 2006. http://nbn-resolving.de/urn:nbn:de:swb:ch1-200601662.

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The boundary concentrated finite element method is a variant of the hp-version of the finite element method that is particularly suited for the numerical treatment of elliptic boundary value problems with smooth coefficients and low regularity boundary conditions. For this method we present two multilevel preconditioners that lead to preconditioned stiffness matrices with condition numbers that are bounded uniformly in the problem size N. The cost of applying the preconditioners is O(N). Numerical examples illustrate the efficiency of the algorithms.
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16

Lindqvist, Petter. "Validering av solida temperaturer i FDS genom jämförelse mot FE-beräkningar." Thesis, Luleå tekniska universitet, Institutionen för samhällsbyggnad och naturresurser, 2020. http://urn.kb.se/resolve?urn=urn:nbn:se:ltu:diva-79973.

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FDS (Fire Dynamics Simulator) använder en version av Navier-Stokes ekvationerna för att göra noggranna beräkningar av värme- och gastransport genom brandbelastade utrymmen. Utvecklarna av programmet arbetar kontinuerligt med att validera det allteftersom nya funktioner tillförs för att öka noggrannheten och bredda tillämpningsområdena. Väldigt lite av detta arbete fokuserar dock på FDS:s konduktionsmodell, den endimensionella Crank-Nicolson metoden. Det här examensarbetet ämnar därför undersöka noggrannheten i FDS:s konduktionsmodell genom jämförelse mot beräkningar med FEM (Finita elementmeto
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Eibner, Tino, and Jens Markus Melenk. "p-FEM quadrature error analysis on tetrahedra." Universitätsbibliothek Chemnitz, 2007. http://nbn-resolving.de/urn:nbn:de:bsz:ch1-200702059.

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In this paper we consider the p-FEM for elliptic boundary value problems on tetrahedral meshes where the entries of the stiffness matrix are evaluated by numerical quadrature. Such a quadrature can be done by mapping the tetrahedron to a hexahedron via the Duffy transformation. We show that for tensor product Gauss-Lobatto-Jacobi quadrature formulas with q+1=p+1 points in each direction and shape functions that are adapted to the quadrature formula, one again has discrete stability for the fully discrete p-FEM. The present error analysis complements the work [Eibner/Melenk 2005] for the p-FEM
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18

Donner, Hendrik. "FEM-basierte Modellierung stark anisotroper Hybridcord-Elastomer-Verbunde." Doctoral thesis, Universitätsbibliothek Chemnitz, 2017. http://nbn-resolving.de/urn:nbn:de:bsz:ch1-qucosa-229188.

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Zur Analyse der Beanspruchungen in textilverstärkten Elastomerbauteilen wie Luftfedern, Reifen, Riemen und Schläuchen sind Berechnungsmodelle mit einer feinen Balance zwischen Genauigkeit und Effizienz erforderlich. Die großen Deformationen, stark anisotropen Struktureigenschaften und kleinen Abmessungen der Festigkeitsträger gegenüber denen des Bauteils bedürfen einerseits einer detaillierten Modellierung, andererseits sind die kritischen Bereiche in diesen Bauteilen räumlich stark begrenzt, sodass eine Reduktion des Berechnungsaufwands erstrebenswert ist. Diese Modellreduktion führt zu Simul
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19

Sayar, Sepideh. "Heat Transfer During Melting and Solidification in Heterogeneous Materials." Thesis, Virginia Tech, 2000. http://hdl.handle.net/10919/36147.

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A one-dimensional model of a heterogeneous material consisting of a matrix with embedded separated particles is considered, and the melting or solidification of the particles is investigated. The matrix is in imperfect contact with the particles, and the lumped capacity approximation applies to each individual particle. Heat is generated inside the particles or is transferred from the matrix to the particles coupled through a contact conductance. The matrix is not allowed to change phase and energy is either generated inside the matrix or transferred from the boundaries, which is initially con
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Ridane, Nader. "FEM-gestützte Prozessregelung des Freibiegens /." Aachen : Shaker, 2008. http://d-nb.info/989460258/04.

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Eibner, Tino. "Randkonzentrierte und adaptive hp-FEM." Doctoral thesis, Universitätsbibliothek Chemnitz, 2006. http://nbn-resolving.de/urn:nbn:de:swb:ch1-200601050.

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Die vorliegende Arbeit befasst sich mit verschiedenen Aspekten der hp-FEM. Insbesondere werden hierbei folgende Punkte genauer untersucht: 1. Das effiziente Aufstellen der Steifigkeitsmatrix auf Referenzelementen, die keine Tensorproduktstruktur besitzen. 2. Eine lokale Konvergenzbetrachtung für die randkonzentrierte hp-FEM. 3. Ein Multilevel-Löser für die randkonzentrierte hp-FEM. 4. Eine Strategie für hp-Adaptivität.
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Mikšík, Libor. "Rám klece výtahu." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2013. http://www.nusl.cz/ntk/nusl-230564.

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This master’s thesis deals with the strength analysisby frame lift cage with lift capacity of 675 kg used the Finite Element Method (FEM). Furtheris performed the calculation of the guideanchoring instituted for this steel structure and the strength analysis of the used guides according to norm ČSN EN 81-1. The thesis also includes the drawing of the frame lift cage.
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Almeida, Wagner José de. "Otimização estrutural de protótipos fabricados pela tecnologia FDM utilizando o método dos elementos finitos." Universidade de São Paulo, 2007. http://www.teses.usp.br/teses/disponiveis/18/18146/tde-05022010-163333/.

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Este trabalho tem como objetivo principal a otimização dos protótipos fabricados pelo processo FDM (Fused Deposition Modeling) em procedimento baseado na análise do comportamento estrutural dos protótipos variando as estratégias de preenchimento das camadas. Para atingir tal objetivo, corpos de prova com diferentes orientações de preenchimento foram ensaiados experimentalmente e os resultados foram verificados em análise estrutural por elementos finitos. Foram verificados o caráter ortotrópico do material do protótipo e a validade do uso da Teoria Clássica dos Laminados na simulação de seu com
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Kennedy, Deniz. "Level Set Methods for Two-Phase Flows with FEM." Thesis, Uppsala universitet, Institutionen för informationsteknologi, 2014. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-238163.

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Two-phase flows is a branch of multiphase flows. The aim of the project is to implement two different level set methods and analyse and compare the numerical results. The level set method is used in order to represent the behaviour of the interface between two incompressible fluids in a flow. Reinitialization is a method to straighten a distorted shape of the level set function that might be caused by the numerical solution of the convection equation and/or by the complicated fluid velocity fields. The main purpose of reinitialization is to preserve the level set function, and thus the shape o
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NOVOA, DANNY MESIAS CHAVEZ. "PHYSICAL -CHEMICAL EVALUATION OF HIGH DENSITY POLYETHYLENE PROCESSED BY THE 3D PRINTING METHOD OF FUSED DEPOSITION MODELING FDM." PONTIFÍCIA UNIVERSIDADE CATÓLICA DO RIO DE JANEIRO, 2014. http://www.maxwell.vrac.puc-rio.br/Busca_etds.php?strSecao=resultado&nrSeq=24466@1.

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PONTIFÍCIA UNIVERSIDADE CATÓLICA DO RIO DE JANEIRO<br>COORDENAÇÃO DE APERFEIÇOAMENTO DO PESSOAL DE ENSINO SUPERIOR<br>PROGRAMA DE SUPORTE À PÓS-GRADUAÇÃO DE INSTS. DE ENSINO<br>O objetivo deste trabalho foi estudar a influencia das condições da impressão 3D nas propriedades finais do polietileno de alta densidade usando a modelagem por fusão e deposição, FDM. Foram impressos protótipos com formato de corpos de prova para teste de tração tipo V segundo norma ASTM D638, a três temperaturas de processamento: 220, 240 e 260 Graus Celsius. Para a impressão das amostras foram mantidos constantes os
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Renardy, Marissa. "Analysis of the BiCG Method." Thesis, Virginia Tech, 2013. http://hdl.handle.net/10919/50922.

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The Biconjugate Gradient (BiCG) method is an iterative Krylov subspace method that utilizes a 3-term recurrence.  BiCG is the basis of several very popular methods, such as BiCGStab.  The short recurrence makes BiCG preferable to other Krylov methods because of decreased memory usage and CPU time.  However, BiCG does not satisfy any optimality conditions and it has been shown that for up to n/2-1 iterations, a special choice of the left starting vector can cause BiCG to follow {em any} 3-term recurrence.  Despite this apparent sensitivity, BiCG often converges well in practice.  This paper see
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Osman, Josef. "Dimensionering av plattbärlag enligt gällande föreskrifter : med hjälp av FEM-Design." Thesis, Luleå tekniska universitet, Byggkonstruktion och brand, 2020. http://urn.kb.se/resolve?urn=urn:nbn:se:ltu:diva-81419.

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This thesis aims to reduce the reinforcement areas in lattice girder elements after large amounts have been observed in several projects. Existing handbooks and materials for designing lattice girder elements have been analyzed. A revised calculation model for design that is adapted to Eurocode and the Swedish national annex EKS 11 has then been developed. The calculation model should be seen as a proposal to how lattice girder elements can be designed. A reference project has laid the basis for testing the calculation model. Simultaneously two finite element models have been established in FE
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Žůrek, Dalibor. "Metody pro analýzu vlastností přenosových vedení." Master's thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2012. http://www.nusl.cz/ntk/nusl-219854.

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This work focuses on a search of available literature on the theory of transmission lines and verify the possibility of simulation processes on these lines using a suitable simulation program. Initially, for the introduction to the parameters and the phenomenon that characterize the line and are important for understanding the issue. These parameters are then measured and compared with traces from the simulation in program PSpice. In another part of the work, the reader is familiar with the basics of reflectometry and fault detection capabilities on transmission lines with the basic reflectome
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Moraes, Tiago Bueno de. "O método da diagonalização filtrada (FDM) e suas aplicações para a Ressonância Magnética." Universidade de São Paulo, 2011. http://www.teses.usp.br/teses/disponiveis/76/76131/tde-16092011-084245/.

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Este trabalho consiste em realizar um estudo detalhado das vantagens e desvantagens da utilização do FDM (Filter Diagonalization Method) para a análise de dados obtidos pela sequência de Precessão Livre no Estado Estacionário (Steady State Free Precession - SSFP) para aquisição rápida de espectros de Ressonância Magnética Nuclear (RMN). No caso de RMN de baixa resolução, o procedimento de aquisição rápida, SSFP, é uma poderosa ferramenta para melhorar a relação sinal/ruído, apresentando muitas aplicações práticas. Apesar desse sucesso em baixa resolução, a SSFP não é rotineiramente utilizada p
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Banihashemi, Seyed Parsa. "Parallel explicit FEM algorithms using GPU's." Diss., Georgia Institute of Technology, 2015. http://hdl.handle.net/1853/54391.

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The Explicit Finite Element Method is a powerful tool in nonlinear dynamic finite element analysis. Recent major developments in computational devices, in particular, General Purpose Graphical Processing Units (GPGPU's) now make it possible to increase the performance of the explicit FEM. This dissertation investigates existing explicit finite element method algorithms which are then redesigned for GPU's and implemented. The performance of these algorithms is assessed and a new asynchronous variational integrator spatial decomposition (AVISD) algorithm is developed which is flexible and enco
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Säll, Anna-Maria. "Jämställdhetsintegrering och hälsa i fem svenska landsbygdskommuner. : En studie med mixad metod." Thesis, Mittuniversitetet, Avdelningen för hälsovetenskap, 2019. http://urn.kb.se/resolve?urn=urn:nbn:se:miun:diva-36543.

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O, Chol Gyu. "Shape optimization for Two-Dimensional transonic airfoil by using the coupling of FEM and BEM." [S.l. : s.n.], 2006. http://nbn-resolving.de/urn:nbn:de:bsz:93-opus-26978.

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Simeitis, Sven D. "Vergleich von Simulationen mittels Pro/MECHANICA und ANSYS." Universitätsbibliothek Chemnitz, 2011. http://nbn-resolving.de/urn:nbn:de:bsz:ch1-qucosa-68443.

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Gegenstand dieser Arbeit ist es, Simulationsergebnisse von Pro/MECHANICA und ANSYS zu vergleichen, um somit einen Hinweis auf die Qualität der Berechnungsergebnisse von integrierten FEM-Systemen zu bekommen. Als Beispiele dienen verschiedene Bauteile aus dem Gebiet der Strukturmechanik (linear-elastischer Bereich), welche mit Pro/MECHANICA und ANSYS modelliert und berechnet werden. Abschließend erfolgt eine Gegenüberstellung der Daten aus FEM und analytischer Rechnung, sowie eine Bewertung der Ergebnisse.
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Satof, Mostafa, and Hasanain Hasse Hasson Al-asadi. "Modellering av rörliga laster : Jämförelse av resultat från influenslinje- och influensytametod från FEM-program." Thesis, KTH, Byggteknik och design, 2019. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-255608.

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At present, the usage of FEM-programs becomes wider for loads effect calculation of bridges. Even though the calculation in all FEM-programs works following the same procedure, it differs when it comes to moving loads where we can identify two different approaches, ILM and ISM (influence line and influence surface method). ISM is used in FEM-programs that are most adapted for bridges where moving loads have great influence, while ILM is used in FEM-programs where moving loads are less important as house constructions. The aim is to evaluate the use of ILM programs (eg FEM-Design) when managing
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Kocak, Umut, Karljohan Palmerius, and Matthew Cooper. "Dynamic Deformation Using Adaptable, Linked Asynchronous FEM Regions." Linköpings universitet, Visuell informationsteknologi och applikationer, 2009. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-18053.

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In order to simulate both physically and visually realistic soft tissuedeformations, the Finite Element Method (FEM) is the mostpopular choice in the literature. However it is non-trivial to modelcomplex behaviour of soft tissue with sufficient refresh rates, especiallyfor haptic force feedback which requires an update rate ofthe order of 1 kHz. In this study the use of asynchronous regions isproposed to speed up the solution of FEM equations in real-time. Inthis way it is possible to solve the local neighborhood of the contactwith high refresh rates, while evaluating the more distant regions
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Vaněčková, Adéla. "Implicitní a explicitní metoda v nelineární dynamice." Master's thesis, Vysoké učení technické v Brně. Fakulta stavební, 2017. http://www.nusl.cz/ntk/nusl-265572.

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The final thesis „Explicit and Implicit methods in nonlinear dynamics“ deals with the issue of geometrical and physical nonlinear analysis of structures exposed to seismic loading by the methods of direct integration of equations of motion. Solution by the explicit and the implicit method is compared for three material models. While the differences between the results of the explicit method and the implicit Newmark method are small as expected, the differences are substantial between the results of different material models. However, these differences are explained and they are in full concord
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Iatridis, Konstantin. "Temperaturoptionen für die Elemente BITO und TORU des FEM-Programms COSA." [S.l.] : Universität Stuttgart , Zentrale Universitätseinrichtung (RUS, UB etc.), 1996. http://www.bsz-bw.de/cgi-bin/xvms.cgi?SWB6783421.

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38

Grasso, Eva. "Modelling visco-elastic seismic wave propagation : a fast-multipole boundary element method and its coupling with finite elements." Phd thesis, Université Paris-Est, 2012. http://tel.archives-ouvertes.fr/tel-00730752.

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The numerical simulation of elastic wave propagation in unbounded media is a topical issue. This need arises in a variety of real life engineering problems, from the modelling of railway- or machinery-induced vibrations to the analysis of seismic wave propagation and soil-structure interaction problems. Due to the complexity of the involved geometries and materials behavior, modelling such situations requires sophisticated numerical methods. The Boundary Element method (BEM) is a very effective approach for dynamical problems in spatially-extended regions (idealized as unbounded), especially s
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39

Johansson, Christer. "Numerical Methods for Ports in Closed Waveguides." Licentiate thesis, KTH, Numerical Analysis and Computer Science, NADA, 2003. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-1652.

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<p>Waveguides are used to transmit electromagnetic signals.Their geometry is typically long and slender their particularshape can be used in the design of computational methods. Onlyspecial modes are transmitted and eigenvalue and eigenvectoranalysis becomes important.</p><p>We develop a .nite-element code for solving theelectromagnetic .eld problem in closed waveguides .lled withvarious materials. By discretizing the cross-section of thewaveguide into a number of triangles, an eigenvalue problem isderived. A general program based on Arnoldi’s method andARPACK has been written using node and e
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40

Cater, Miriam Regina. "Permeability and Porosity Reduction of Fused Deposition Modeling Parts via Internal Epoxy Injection Methods." The Ohio State University, 2014. http://rave.ohiolink.edu/etdc/view?acc_num=osu1396441215.

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41

Lau, Sum-hung. "Adaptive FEM preprocessing for electro magnetic field analysis of electric machines /." Hong Kong : University of Hong Kong, 1995. http://sunzi.lib.hku.hk/hkuto/record.jsp?B17505823.

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42

Nedělka, Pavel. "Deformační a napjatostní analýza nárazníkové částí automobilu při rázovém zatěžování." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2011. http://www.nusl.cz/ntk/nusl-229650.

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The master thesis deals with a stress-strain analysis of the front crash structure of a race car by using the finite element method. The structure is loaded by an impact loading. This type of analysis belongs to the transient analysis so the explicit formulation of the finite element method is used. The LS-DYNA software was used for calculations. The goal of this thesis is to express the influence of the crash structure to the change of the car's kinetic energy as well as the amount of absorbed energy in case of frontal impact.
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43

Michalčák, Jan. "Výpočtová únosnost pilotových základů." Master's thesis, Vysoké učení technické v Brně. Fakulta stavební, 2018. http://www.nusl.cz/ntk/nusl-372055.

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The thesis deals with calculation of foundation of pilot bases. In the first part, the author focuses on the numerical application of the Final Element Method for calculating the internal forces on the pilot and the software implementation of the proposal by the Masopust pilot (2nd Limit State). The second, practical part uses previous knowledge and created program to calculate the foundation of the bridge pillar on the bypass around Opava.
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44

Lezar, Evan. "hp-Adaptation for the FEM Analysis of Waveguides." Thesis, Link to the online version, 2008. http://hdl.handle.net/10019/1335.

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45

Karlsson, Henrik, and Joakim Gustavsson. "Stabilitetsanalys av ledstaplartruck med avseende på tippning : En FEM-baserad metod för heltrucksmodeller." Thesis, Linköpings universitet, Mekanik och hållfasthetslära, 2018. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-148603.

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The purpose has been to analyze a modelling process based on the finite element method (FEM), for a powered stacker truck of the model SPE 140 TX HILO. It was analyzed how such a model should be designed in order to perform stability analyses. This was done by analyzing which of the trucks components that were relevant from a stability perspective. These components were analyzed in order to figure out which modelling approach that was best suited to model the components in a FEM-software. The result of these analyses is a modelling methodology describing which approach that should be used duri
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46

Larsson, Louise. "Motorväg till det omedvetna? : Fem psykoterapeuters upplevelser av att lära sig arbeta med Intensive Short-Term Dynamic Psychotherapy." Thesis, Ersta Sköndal högskola, S:t Lukas utbildningsinstitut, 2012. http://urn.kb.se/resolve?urn=urn:nbn:se:esh:diva-2439.

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Inledning: Psykoterapeutiskt arbete med bearbetning av omedvetna känslomässiga konflikter innebär ofta terapiprocesser som varar över lång tid och kan bedrivas med skiftande tekniker. Psykodynamiskt inriktade terapeuters arbetssätt speglar deras teoretiska övertygelse och personliga läggning. Många arbetar intuitivt och med ett eklektiskt förhållningssätt. Att arbeta efter en sekventiell, tydligt formgiven metod är ovanligt inom den dynamiska/analytiska traditionen. Syftet med studien är att undersöka fem psykoterapeuters upplevelse av att lära sig arbeta efter en specifik metod med fokus på a
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47

Reul, Stefan. "Numerische Singularitäten bei FEM-Analysen." Universitätsbibliothek Chemnitz, 2012. http://nbn-resolving.de/urn:nbn:de:bsz:ch1-qucosa-87212.

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48

Eibner, Tino, and Jens Markus Melenk. "An adaptive strategy for hp-FEM based on testing for analyticity." Universitätsbibliothek Chemnitz, 2006. http://nbn-resolving.de/urn:nbn:de:swb:ch1-200601484.

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We present an $hp$-adaptive strategy that is based on estimating the decay of the expansion coefficients when a function is expanded in $L^2$-orthogonal polynomails on a triangle or a tetrahedron. This method is justified by showing that the decay of the coefficients is exponential if and only if the function is analytic. Numerical examples illustrate the performance of this approach, and we compare it with two other $hp$-adaptive strategies.
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49

Bewick, Bryan T. "A combined FEM and MPM simulation of impact-resistant design /." free to MU campus, to others for purchase, 2004. http://wwwlib.umi.com/cr/mo/fullcit?p1422910.

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50

Benner, Peter. "Modellordnungsreduktion für strukturmechanische FEM-Modelle von Werkzeugmaschinen." Universitätsbibliothek Chemnitz, 2009. http://nbn-resolving.de/urn:nbn:de:bsz:ch1-200901725.

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Arbeitsbericht zum Projekt Integrierte Simulation des Systems "Werkzeugmaschine - Antriebe - Zerspanprozess" auf der Grundlage ordnungsreduzierter FEM-Strukturmodelle. Inhalt: Modellreduktion für lineare Systeme, Balanciertes Abschneiden, Singuläre Systeme 2. Ordnung, Offene Fragen und weiteres Vorgehen.
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