Browsing Institutt for marin teknikk by Title
Now showing items 1811-1830 of 3472
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Investigation of the effect of sloshing in a floating closed fish farm
(Master thesis, 2018)In this thesis, the effect of sloshing on the dynamic response of a floating closed containment system(FCCS) has been investigated. Results from the SINTEF OCEANS experiment SJØFLO have been examined and compared to numerical ... -
Investigation of the Effects of Mass Flow Meters on the Singaporean Bunker Industry
(Master thesis, 2019)Denne oppgaven undersøker om massestrømmålere har en effekt på bunkersindustrien i Singapore. Drivstoffkvalitetsdata og prisdata blir analysert for å finne endringer som følge av eventuelle effekter av massestrømmålere. ... -
Investigation of the Tower Design for the Offshore Wind Turbine Concept OO-Star Wind Floater
(Master thesis, 2019)Målet med denne masteravhandlingen er å evaluere hvor følsomt tårndesignet til en havvindturbin er med hensyn til rotasjonsfrekvenser fra turbinen. Undersøkelsen er gjort for det flytende havvind konseptet OO-Star Wind ... -
Investigation of the Wake Flow behind a stepped circular Cylinder using Particle Image Velocimetry
(Master thesis, 2012)Subject of the present study was the investigation of the wake behind stepped circular cylinders. Experiments were performed using particle image velocimetry (PIV). Cylinder models with diameter ratios D/d=1, D/d=6/5 and ... -
Investigation of thrust loss due to steering while trawling
(Master thesis, 2017)This thesis investigates the potential for a reduction in required propeller power by optimizing the transverse position of attachment points for trawl warps, simulating a system of movable trawl blocks. Full scale ... -
Investigation of wave-induced nonlinear load effects in open ships considering hull girder vibrations in bending and torsion
(Doktoravhandlinger ved NTNU, 1503-8181; 2012:357, Doctoral thesis, 2012)For ships with open cross sections, such as container vessels, it is of primary importance to accurately estimate torsional moment (TM) and horizontal bending moment (HBM) as well as vertical load effects. In recent decades, ... -
Investigation of Wave-Induced ULS and ALS Characteristic Loads and Responses on a Pile Structure in the Ekofisk Area - Importance of Breaking Waves
(Master thesis, 2016)A set of metocean contour lines corresponding to annual exceedance probabilities of 10^(-2) and 10^(-4) describing the environmental conditions at the Ekofisk area are established based on hindcast data. These are divided ... -
investigation of which sea states yield the dominating contribution to fatigue accumulation in offshore structure
(Master thesis, 2015)In assessment of the fatigue damage, it has been assumed that the moderate sea states (significant wave height ranged between 4-8m) should have major influence on the offshore structures because they have relatively more ... -
Investigation on the Performance of the Universal Buoyancy System
(Master thesis, 2014)Future increase in the market demand for liquefied natural gas (LNG) will pose new challenges to the existing infrastructure for LNG distribution. The Universal Buoyancy System (UBS) seeks to contribute to the solution of ... -
Investigations of Shear Interaction and Stress in Flexible Pipes and Umbilicals
(Doctoral theses at NTNU;2018:368, Doctoral thesis, 2018)The present thesis deals with numerical modeling and experimental testing related to dynamic stress behavior of flexible pipes and umbilicals, with particular focus on shear interaction and friction effects. For the ... -
Is ambient light during the high Arctic polar night sufficient to act as a visual cue for zooplankton?
(Journal article, 2015)The light regime is an ecologically important factor in pelagic habitats, influencing a range of biological processes. However, the availability and importance of light to these processes in high Arctic zooplankton communities ... -
Islaster på en FPSO
(Master thesis, 2019)Denne masteroppgaven forklarer hvordan ekstreme islaster påvirker skroget på en FPSO lokalisert i isbelagte områder. En omfattende studie av isteori ble utført. Kunnskap om isfysikk og ismekanikk er viktig for å bedre kunne ... -
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 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. ... -
An isogeometric finite element-boundary element approach for the vibration analysis of submerged thin-walled structures
(Peer reviewed; Journal article, 2021)In this paper, the isogeometric formulations of the finite element and boundary element methods are applied to the dynamic analysis of thin-walled structures submerged in an infinite, inviscid, and incompressible fluid ... -
Isogeometric Kirchhoff-Love shell formulation for elasto-plasticity
(Journal article; Peer reviewed, 2018)An isogeometric thin shell formulation allowing for large-strain plastic deformation is presented. A stress-based approach is adopted, which means that the constitutive equations are evaluated at different integration ... -
Isogeometric Phase-Field Methods for Modeling Fracture in Shell Structures
(Doctoral theses at NTNU;2021:87, Doctoral thesis, 2021)The simulation of the fracture of engineering structures is a challenging topic that requires accurate and efficient numerical models. This thesis focuses on the modeling of brittle and ductile fracture in thin shell structures ... -
Isogeometric Structural Analysis of Wind Turbine Blades
(Master thesis, 2018)Isogeometric analysis, IGA, seeks to bridge the gap between engineering design and computational analysis by using spline functions as finite element bases in the analysis framework. The general concept can be applied to ...