Blar i Institutt for marin teknikk på utgivelsesdato
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Optimal configuration of supply logistics for remote oil and gas fields
(Master thesis, 2013)The objective of this thesis has been to compare alternatives to improve the supply service for remote locations offshore. First the alternative of running a conventional supply service has been assessed, where the platform ... -
Automatic image segmentation for boundary detection of apparently connected sea-ice floes
(Chapter, 2013)Ice concentration, ice types, and floe size distribution are three important factors in the analysis of ice-structure interaction in a broken ice field. The use of cameras as sensors for offshore operations in ice-covered ... -
Analysis and Design of Columns in Offshore Structures subjected to Supply Vessel Beam Collisions
(Master thesis, 2013)The recommended force-deformation curves for supply vessels collision presented in NORSOK N-004 are based on simplified methods and tests developed more than 30 years ago. The purpose of this work is to contribute to the ... -
Airborne Wind Turbines for Ship Propulsion
(Master thesis, 2013)As the focus on the environment and how to produce ?clean? and renewable energy takes a lot of focus these days, the research on this field is constantly increasing. Especially in the shipping industry there are frequently ... -
Impact Loads on Circular Cylinders
(Master thesis, 2013)In the past, testing of water impact problems such as breaking waves impacting on risers, lowering of subsea structures through the splash zone and free fall lifeboat performance has been carried out either by model tests ... -
Probabilistic material modeling of iceberg for analysis of accidental impacts with ships and offshore structures
(Master thesis, 2013)There has been an increasing interest of maritime and offshore operations in the arctic regions for some decades now. In arctic regions there are icebergs which can?t be neglected. The first part of this thesis is an ... -
Guidance and control of iceberg towing operation in open water, with experimental testing
(Master thesis, 2013)Icebergs pose serious threats to existing and planned offshore structures, vessels, and operations in Arctic waters such as the East Coast of Canada, East and West Greenland, the Barents Sea, and the Kara Sea. A collision ... -
Numerical Simulations for Installation of Offshore Wind Turbine Monopiles Using Floating Vessels
(Chapter; Peer reviewed, 2013)Monopiles are the most commonly used support structures for offshore wind turbines with up to 40m water depth due to the simplicity of the structure. The installation of turbine support structures can be carried out by a ... -
Statistisk Analyse av Dimensjonerende Laster for et Fartøy: Slamming Laster
(Master thesis, 2013)SammendragPå grunn av klimaendringer, opptrer stormer og sykloner sjeldnere enn før. Imidlertid viser forskning at intensiteten på stormene øker. Dette føre til mer ekstreme bølgehøyder, som den maritime næringen må forholde ... -
Anchor Hooking of Pipelines
(Master thesis, 2013)1.Pipeline material effectThe displacement and force of mid-element pipeline in local horizontal and verticalplane in the elastoplastic pipeline model are larger than that in the elastic model.In the opposite way the bending ... -
Handling aspects of complexity in conceptual ship design
(Doktoravhandlinger ved NTNU, 1503-8181; 2013:319, Doctoral thesis, 2013)This research examines the handling complexity aspects of conceptual design. Contemporary consensus suggests vessel design must consider new market requirements such as greater emphasis on environmental performance, a ... -
Ageing management and life extension of technical systems : concepts and methods applied to oil and gas facilities
(Doktoravhandlinger ved NTNU, 1503-8181; 2013:178, Doctoral thesis, 2013)The oil and gas (O&G) industry is becoming increasingly interested in prolonging the operation of some facilities beyond their original design lifetime. The main challenge when extending the life of an ageing facility is ... -
Transitional wake flow behind an inclined flat plate : computation and analysis
(Doktoravhandlinger ved NTNU, 1503-8181; 2013:179, Doctoral thesis, 2013)The flow past an inclined flat plate is characterized by fixed separation points at both edge and an asymmetric wake pattern. The present doctoral thesis investigates the threedimensional characteristics in the wake of an ... -
A Numerical Parameter Study on Current Forces on Circular Aquaculture Net Cages
(Chapter, 2013)The focus in this paper is on current forces on circular aquaculture nets, and how they vary with different parameters. The main parameters are current velocity and profile, solidity ratio of the net, sinker weights and ... -
Effect of ship speed on ship’s ice resistance with ship’s vertical motions included
(Chapter, 2013)In this paper, the relations between ice resistance, shipspeed and ship motions are investigated with a numericalmodel simulating the icebreaking process with ship'smotions in 6 degrees of freedom (DOF). The coupledmotions ... -
Effect of ship speed on ship’s ice resistance with ship’s vertical motions included
(Chapter, 2013)In this paper, the relations between ice resistance, shipspeed and ship motions are investigated with a numericalmodel simulating the icebreaking process with ship'smotions in 6 degrees of freedom (DOF). The coupledmotions ... -
Experimental and Numerical Analysis of Combined In-line and Cross-flow Vortex Induced Vibration
(Doctoral Theses at NTNU, 1503-8181; 2013:23, Doctoral thesis, 2013)This thesis presents results from experimental and numerical investigations of the hydrodynamic forces on a rigid cylinder moving with prescribed orbits in uniform flow. The hydrodynamic forces are measured in both in-line ... -
Dynamic Response of Floating Wind Turbines
(Master thesis, 2013)In this thesis the extreme values of tension in the mooring lines on Hywind Demo is investigated. Hywind Demo is a floating wind turbine developed by Statoil ASA. The aim of the study is to evaluate the application of the ... -
Structural Design Considerations for an Ice Resistant Semi Submersible Drilling Rig
(Master thesis, 2014)Arctic areas contain large oil and gas fields demanding robust drilling and field development solutions. Semi submersible drilling and completion rigs are highly used for the current operations. Operating while surrounded ... -
Modeling, Simulation and Control of Hydraulic Winch System
(Master thesis, 2014)In this thesis a hydraulic low pressure winch system has been modeled using bond graph theory. The hydraulic winch system is assumed to be installed on an offshore vessel affected by environmental forces and disturbances ...