Blar i Institutt for marin teknikk på utgivelsesdato
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Experimental and numerical studies related to the coupled behavior ofice mass and steel structures during accidental collisions
(Doktoravhandlinger ved NTNU, 1503-8181; 2014:135, Doctoral thesis, 2014)More and more people are attracted to go North. To design a fixed or a floating structure for Arctic conditions, to set operational limits or to specify certain safety requirements, one must rely on limited knowledge, data ... -
Experimental and finite element analysis of fatigue strength for 300 mm2 copper power conductor
(Journal article; Peer reviewed, 2014)The fatigue strength of a 300 mm2 stranded copper conductor was investigated experimentally and by finite element (FE) analysis. An analytical model was also developed and validated. Wires taken from the outer layer of the ... -
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 ... -
Experimental Validation and Design Review of Wave Loads on Large-Diameter Monopiles
(Master thesis, 2015)The objective of the thesis work was to explore challenges related to ULS wave loading on offshore wind turbines, with special emphasis on large-diameter inertia-dominated monopile foundations. Experimental studies testing ... -
Investigation of Hydrodynamic Performance of a Twin-Screw Trawler Using CFD
(Master thesis, 2015)Previously experimental methods or empirical knowledge laid the foundation for ship design. Performing a model test in a towing tank is time consuming and expensive. In addition to this, studying detailed effects in a ... -
Ultimate- and Fatigue Limit State Analysis of a Rigid Offshore Aquaculture Structure
(Master thesis, 2015)Marine fish farming is in rapid development, dimensions are expected to increase, and locations are being moved to areas exposed to more energetic waves and stronger currents. New and extreme loading scenarios need to be ... -
Real-Time Marine Vessel and Power Plant Simulation
(Chapter; Peer reviewed, 2015)In this paper, we present a system simulator of a marine vessel and power plant which contains the mechanical system with diesel engines, propellers, steering gear, and thrusters; the electrical system with generators, ... -
Enhancing the basis for Crew Resource Management (CRM) training for well operations crews: Risk Influencing Factors in Offshore Drilling
(Chapter, 2015)The offshore drilling industry is experiencing a stronger focus on human and organizational factors that are influencing risk of major accidents. Industry associations, authorities and drilling operators are starting on ... -
Design and Analysis of Mooring System for Semi-submersible Floating Wind Turbines in Shallow Water
(Master thesis, 2015)There has been a remarkable development in offshore wind energy. From the view of cost efficiency, floating wind turbine becomes more competitive than bottom fixed wind turbine when the water depth comes above 50 m. ... -
Experimental and numerical study of an aquaculture net cage with floater in waves and current
(Journal article, 2015)The mooring loads on an aquaculture net cage in current and waves are investigated by dedicated model tests and numerical simulations. The main purpose is to investigate which physical effects are dominant for mooring ... -
Maritime activity in the high north - The range of unwanted incidents and risk patterns
(Journal article; Peer reviewed, 2015)Growing commercial activities in the High North increase the possibility of unwanted incidents. The vulnerability related to human safety, environment, and installations or vessels, and a challenging context, call for ... -
Design av en ROV for forbrukermarkedet
(Master thesis, 2015)Flygende droner har de siste årene blitt introdusert til forbrukermarkedet med stor suksess. Dette innpasset gav en ide om en tilvarende løsning for bruk under vann, en lavkostnads ROV (Remotely Operated Vehicle). Dette ... -
Stochastic Dynamic Analysis of Offshore Bottom-Fixed Structures
(Master thesis, 2015)Paper 1 The first part of this master thesis presented in paper one, is evaluating several methods to estimate dynamic amplification of drag dominated structures. This is done primarily by 3 hour time-domain analysis in ... -
Toward a holistic load model for structures in broken ice
(Journal article; Peer reviewed, 2015)Over the past decade we have seen an increase in marine operations in Arctic waters. Despite research and work on several offshore standards and ship rules, the ice loads on fixed and floating structures are not fully ... -
Estimation of Extreme Response - in a Jack-up Platform by Application of Stochastic Methods
(Master thesis, 2015)Abstract This thesis investigates different stochastic methods for estimating the extreme response on a jack-up platform in the North Sea. The extreme response of jack-ups is often heavily affected by dynamics and thus ... -
Dynamic Response of Flexible Risers due to Unsteady Slug Flow
(Doctoral thesis at NTNU;2015:182, Doctoral thesis, 2015)In this work the influence of unsteady slug flow on the dynamic response of flexible risers is analysed using a computational tool consisting of one program for prediction of slug flow development, and another program ... -
Dynamic Stress due to End Effects in of Non-bonded Flexible Pipes
(Master thesis, 2015)In oil and gas industry, flexile riser is a crucial component for the production system which connected the seabed and the floating units. At the upper end of the flexible riser, bend stiffener is added to reduce the over ... -
Development of a Simulation Platform for ROV systems
(Master thesis, 2015)ROVs are frequently used in subsea operations, both in the oil and gas industry, by scientists and in aquacultures. The ROV missions are normally controlled by a human operator, and the results are highly depending on ... -
Joint Distribution of Environmental Condition at Five European Offshore Sites for Design of Combined Wind and Wave Energy Devices
(Journal article; Peer reviewed, 2015)The design of wind turbines requires information about joint data for wind and wave conditions. Moreover, combining offshore wind and wave energy facilities is a potential way to reduce the cost of offshore wind farms. To ... -
Preventing Tower Resonance Induced by Thrust Variations on a Large 10MW Wind Turbine
(Master thesis, 2015)A simulation model based on a 10MW wind turbine is developed to test the performance of a speed exclusion zone algorithm with the purpose of preventing tower resonance. The model includes rotor aerodynamics, drive-train ...