Browsing NTNU Open by Title
Now showing items 50293-50312 of 100783
-
Isogeny Based Cryptography
(Master thesis, 2019)Vi undersøker hvor brukbart tre forskjellige kryposystem er in en post-kvantum verden. Rostovtsev-Stolbunov offentlig nøkkel protokollen, som bruker isogenyer mellom elliptiske kurver, viser seg å være usikre mot ... -
Isogeometric Analysis and Degenerated Mappings
(Master thesis, 2011)In this thesis we have given an introduction to isogeometric finite element analysis on linear elasticity problems in 2D using non uniform rational B-splines (NURBS) as basis functions. We have studied the theory of B-splines ... -
Isogeometric Analysis Based Shape Optimization.
(Master thesis, 2015)We solve shape optimization problems involving partial differential equations. The latter are discretized and solved using isogeometric analysis. B-splines and non uniform rational B-splines are introduced, along with both ... -
Isogeometric analysis of acoustic scattering
(Master thesis, 2015)Acoustic scattering has been thoroughly analyzed with the use of finite element analysis (FEA). The problem at hand is a coupled fluid-structure interaction problem on an unbounded domain, where an object of elastic material ... -
Isogeometric Analysis of Acoustic Scattering using Infinite Elements
(Journal article; Peer reviewed, 2018)Isogeometric analysis (IGA) has proven to be an improvement on the classical finite element method (FEM) in several fields, including structural mechanics and fluid dynamics. In this paper, the performance of IGA coupled ... -
Isogeometric analysis of acoustic scattering with perfectly matched layers (IGAPML)
(Peer reviewed; Journal article, 2022)The perfectly matched layer (PML) formulation is a prominent way of handling radiation problems in unbounded domain and has gained interest due to its simple implementation in finite element codes. However, its simplicity ... -
Isogeometric Analysis of Coupled Problems in Porous Media
(Doctoral theses at NTNU;2016:140, Doctoral thesis, 2016)Computational modeling of coupled problems in porous media is essential in various disciplines of science and engineering. The porous media of interest here are soils subjected to different physical processes. In particular, ... -
Isogeometric analysis of finite deformation nearly incompressible solids
(Peer reviewed; Journal article, 2011)This paper addresses the use of isogeometric analysis to solve finite deformationsolid mechanics problems, in which volumetric locking may be encountered. The current workis based on the foundation developed in the project ... -
Isogeometric Analysis of Thermo-Hydro-Mechanically Coupled Processes in Soil
(Master thesis, 2016)This thesis conducts numerical studies on THM (Thermo-Hydro-Mechanically) coupled problems, using isogeometric elements and two models created at NTNU. One model is for fully saturated porous media, and the second is ... -
Isogeometric analysis of thermoelastic problem
(Master thesis, 2015)In this thesis there is given an introduction to isogeometric finite element method for uncoupled thermo elastic problems using non uniform rational B-splines (NURBS) as basis functions. The numerical analysis of the ... -
Isogeometric analysis of THM coupled processes in ground freezing
(Journal article; Peer reviewed, 2017)An isogeometric analysis (IGA) based numerical model is presented for simulation of thermo-hydro-mechanically (THM) coupled processes in ground freezing. The momentum, mass and energy conservation equations are derived ... -
Isogeometric Analysis Using Locally Refined B-splines
(Doctoral thesis at NTNU;2014:376, Doctoral thesis, 2014) -
Isogeometric analysis using LR B-splines
(Journal article; Peer reviewed, 2014)The recently proposed locally refined B-splines, denoted LR B-splines, by Dokken et al. (2013) [6] may have the potential to be a framework for isogeometric analysis to enable future interoperable computer aided design and ... -
Isogeometric analysis with trimmed geometries applied to ship hulls
(Master thesis, 2018)This Paper aims to investigate Trimmed NURBS surfaces for Isogeometric Analysis(IGA). NURBS are Non-Rational B-spline functions which are widely used for geometric modelling in most Computer aided Design programs. This is ... -
Isogeometric Analysis: Higher-Order Differential Equations
(Master thesis, 2013)This thesis introduces Isogeometric Analysis as a potentional bridge between the Finite Element Analysis (FEA) and Computer Aided Design (CAD) communities. An introduction to B-splines and B-spline-based Isogeometric ... -
Isogeometric boundary element method for acoustic scattering by a submarine
(Journal article; Peer reviewed, 2019)Isogeometric analysis with the boundary element method (IGABEM) has recently gained interest. In this paper, the approximability of IGABEM on 3D acoustic scattering problems will be investigated and a new improved BeTSSi ... -
Isogeometric Collocation - Numerical solution of differential equations
(Master thesis, 2016)This thesis present the theory and implementation of Lagrange polynomial interpolation. We study and implement Splines intended on geometric design and interpolation methods. We explore and implement one dimensional numerical ... -
Isogeometric collocation for implicit dynamics of three-dimensional beams undergoing finite motions
(Journal article; Peer reviewed, 2019)We propose a novel approach to the implicit dynamics of shear-deformable geometrically exact beams, based on the isogeometric collocation method combined with the Newmark time integration scheme extended to the rotation ... -
Isogeometric collocation for the Reissner–Mindlin shell problem
(Journal article; Peer reviewed, 2017)We present an isogeometric collocation formulation for the Reissner-Mindlin shell problem. After recalling the necessary basics on differential geometry and the shell governing equations, we show that the standard approach ... -
Isogeometric contact analysis: Implementation of a penalty based algorithm
(Master thesis, 2019)Strukturanalyse av gjensander som kommer i kontakt med hverandre er komplisert. Kontaktproblemer er ofte relatert til store deformasjoner og ettersom kontaktoverflaten ikke er kjent på forhånd, er de uunngåelig ikke-lineære. ...