Blar i Institutt for marin teknikk på tittel
Viser treff 41-60 av 3410
-
A displacement-free formulation for the Timoshenko beam problem and a corresponding isogeometric collocation approach
(Journal article; Peer reviewed, 2017)We present a reformulation of the classical Timoshenko beam problem, resulting in a single differential equation with the rotation as the only primal variable. We show that this formulation is equivalent to the standard ... -
A distributed anti-collision decision support formulation in multi-ship encounter situations under COLREGs
(Journal article; Peer reviewed, 2015)A multi-ship anti-collision decision support formulation is studied in a distributed and real time way. Under the general requirements from COLREGs rules and regulations, the performance of course alteration and changing ... -
A domain-decomposition strategy for a compressible multi-phase flow interacting with a structure
(Journal article, 2014)The problem of a high-pressure gas cavity and its interaction with surrounding liquid and a close-by structure is examined numerically. Even though this is of interest in many practical applications, here, the focus is on ... -
A Feasibility Study of a Renewable Energy Supply for an Offshore Oil and Gas Installation
(Master thesis, 2022)En hydrodynamisk studie av en flytende vindturbin plassert i Nordsjøen på 130 meters dyp er utført. OO Star Wind Floater som består av en halvt nedsenkbar konstruksjon som støtter referansevindturbinen DTU 10 MW. Den ... -
A Feasibility Study of a Renewable-Energy Supply for an Offshore Oil and Gas Installation
(Master thesis, 2022)En hydrodynamisk studie av en flytende vindturbin plassert i Nordsjøen på 130 meters dyp er utført. OO Star Wind Floater som består av en halvt nedsenkbar konstruksjon som støtter referansevindturbinen DTU 10 MW. Den ... -
A Fluid-Structure Interaction study of flexible net sheet in uniform flow A comparative study between experiments and CFD
(Master thesis, 2021)Offshore aquaculture is a growing field with enormous potential. However, due to harsh condition in these site leads to higher loads. To effectively predict the hydrodynamic behaviour of flexible net in these conditions ... -
A Formal Safety Assessment for Cruise Vessels Along the Norwegian Coast
(Master thesis, 2021)Cruisebransjen vokser over hele verden, og har blitt en stor industri i Norge. Den er spådd å fortsette å ha en solid vekst de neste tiårene, hvor trenden er større skip som frakter flere passasjerer. Cruisetrafikk langs ... -
A framework for cost-benefit analysis on use of condition based maintenance in an IO perspective
(Master thesis, 2011)The maintenance costs of an offshore production platform make up about 30 % of the daily costs, and this is not including the cost of shutdown caused by functional failure. Reducing the maintenance costs will have a great ... -
A framework for isogeometric-analysis-based optimization of wind turbine blade structures
(Journal article; Peer reviewed, 2018)Early‐stage wind turbine blade design usually relies heavily on low‐fidelity structural models; high‐fidelity, finite‐element‐based structural analyses are reserved for later design stages because of their complex workflows ... -
A fully coupled method for numerical modeling and dynamic analysis of floating vertical axis wind turbines
(Journal article; Peer reviewed, 2017)Offshore wind energy is one of the most promising renewable energy resources and an increasing interest arises to develop floating vertical axis wind turbines (VAWTs), which have the potential to reduce the cost of energy. ... -
A global assessment of a floating bridges ability to withstand a ship collision
(Master thesis, 2016)It is planned to exchange the ferry connections along the western coast of Norway with fixed road connections. To be able to do this, new concepts for fjord crossings have to be used. One of these alternatives is a floating ... -
A global slamming force model for offshore wind jacket structures
(Journal article; Peer reviewed, 2018)Under certain harsh environmental conditions, jacket structures supporting offshore wind turbines might be exposed to plunging breaking waves, causing slamming forces that affect the structural integrity and fatigue life. ... -
A Global-local Damage Assessment Methodology for Impact Damage on Offshore Wind Turbine Blades during Lifting Operations
(Chapter, 2018)Lifting the latest generation offshore wind turbines using floating crane vessels is extremely challenging. This comes with an elevated risk of blades impacting the tower or surrounding structures due to excessive crane ... -
A GQPSO Based Optimal Path Planner for Autonomous Underwater Vehicle with Waypoint Guidance System
(Master thesis, 2022)Autonomous underwater vehicle (AUV) has become a popular and important way to do the exploration and exploitation of ocean areas where it's not possible for human to visit such as areas in higher depth. Most of the time, ... -
A gradient-based multiaxial criterion for fatigue crack initiation prediction in components with surface roughness
(Journal article, 2018)The current study presents methods to predict the governing crack initiation site and fatigue crack initiation life of components with surface roughness. The surface topography is measured with white light interferometry ... -
A harmonic polynomial cell (HPC) method for 3D Laplace equation with application in marine hydrodynamics
(Journal article; Peer reviewed, 2014)We propose a new efficient and accurate numerical method based on harmonic polynomials to solve boundary value problems governed by 3D Laplace equation. The computational domain is discretized by overlapping cells. Within ... -
A harmonic polynomial method based on Cartesian grids with local refinement for complex wave-body interactions
(Chapter, 2018)A novel numerical method is proposed for complex potential free-surface flows of incompressible liquids with and without bodies. The present method combines high-order harmonic polynomials with Cartesian grids with local ... -
A higher-order boundary element method and applications to marine hydrodynamics
(Doktoravhandlinger ved NTNU, 1503-8181; 2008:170, Doctoral thesis, 2008) -
A hybrid empirical-numerical method for hydroelastic analysis of a floater-and-net system
(Journal article, 2016)Because of scale effects and inappropriate hydrodynamic models, the nonlinear hydroelastic response of net cages used for fish farming cannot be analyzed precisely with traditional model testing or combinations of FEMs ... -
A Hydro-Aerodynamic Analysis of a Floating Offshore Wind Turbine to Assist in Floater Selection
(Master thesis, 2022)Various types of floaters have been proposed to support floating offshore wind turbines. The bulk of market activity is in semi-submersibles, where each concept is associated with inherent advantages and disadvantages with ...