Blar i Institutt for marin teknikk på utgivelsesdato
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Sammenligning av ulike metoder innen ekstremverdistatistikk
(Master thesis, 2010)Hensikten med denne oppgaven har vært å se på ulike metoder som i dag benyttes for å predikere ekstremverdier i marin sammenheng. Fem ulike metoder er sammenlignet. Metodene er valgt på grunnlag av hvor mye de benyttes og ... -
Numerical simulations of massively separated turbulent flows
(Doktoravhandlinger ved NTNU, 1503-8181; 2011:5, Doctoral thesis, 2010)It is well known that most fluid flows observed in nature or encountered in engineering applications are turbulent and involve separation. Fluid flows in turbines, diffusers and channels with sudden expansions are among ... -
An ROV toolbox for optical and acoustical seabed investigations
(Doktoravhandlinger ved NTNU, 1503-8181; 2010:74, Doctoral thesis, 2010)This thesis describes a set of optical and acoustical methods for documenting a research site using underwater vehicles. The need for observations in cold-water coral research has formed the design problem in this work. A ... -
Analysis and Design of Offshore Jacket Wind Turbine
(Master thesis, 2010)Offshore wind is an attractive source of renewable energy. In order to harvest this abundant energy source wind turbine farms are needed. In order to extend the application of offshore fixed wind turbine (OFWT) in deep ... -
Experimental tests and numerical calculations of replenishment at sea
(Master thesis, 2010)Experimental tests and numerical calculations of replenishment at sea operations for two Fridtjof Nansenclass frigates have been performed. A Fridtjof Nansen-class frigate has been model with the use of empirical formulas ... -
Modelling and phase controlof wave-energy converters
(Doktoravhandlinger ved NTNU, 1503-8181; 2010:23, Doctoral thesis, 2010)Current prognoses are that, unless counteracted by very strong political measures, the world will meet both energy shortage and climate crisis within a horizon of a few decades, both of which are strongly related to our ... -
Maneuvering of two Interacting Ships in Calm Water
(Chapter, 2010)The maneuvering of two interacting ships in calm water at Froude numbers less than ~0.2 and in water of infinite horizontal extent is studied based on an extended version of the maneuvering model for two ships by Skejic ... -
Numerical Potential-Flow Studies on Weakly-Nonlinear Wave-Body Interactions with/without Small Forward Speeds
(Doctoral Theses at NTNU, 1503-8181; 2010:215, Doctoral thesis, 2010)A two-dimensional Quadratic Boundary Element Method (QBEM) and a three-dimensional cubic Higher-order Boundary Element Method (HOBEM) are developed to study respectively the twodimensional and three-dimensional weakly-nonlinear ... -
Integrated Operations in light of the Deepwater Horizon accident
(Master thesis, 2011)In this Master Thesis a description of the Deepwater Horizon Accident has been developed and used. Integrated Operations today and its potential for the future has been described. The new working processes that follow ... -
Estimation of annual probability of mooring line failure as a function of safety factors
(Master thesis, 2011)In Chapter 2, the procedure for designing a mooring line under Norwegian jurisdiction is discussed. The procedure is given by the Norwegian Maritime Directorate through the ANCHORING REGULATION 09 and ISO 19901-7 (2005). ... -
Scour around wind turbine foundations, marine pipelines and short cylinders due to long-crested and short-crested nonlinear random waves plus currents
(Master thesis, 2011)This report presents a stochastic method for predicting scour depth around vertical circular slender piles, including various cross sections and group arrangements, marine pipelines and the burial and scour hole geometry ... -
Calculation of fatigue damage for tensioned risers from vortex induced vibrations
(Master thesis, 2011)Vortex induced vibration (VIV) of long flexible riser subjecting to ocean currents is ubiquitous in offshore industry. Although significant efforts have done to understand this complicated fluid structure interaction ... -
Forces on a net panel
(Master thesis, 2011)Four different methods for calculating forces on and deformation of a net suspended in current have been compared. The four methods are: 1) The method presented by Løland in his PhD thesis. Uses drag and lift coefficients ... -
Concept Design of a Commercial Submarine
(Master thesis, 2011)Oil and gas production in the Arctic poses several new challenges that require new solutions. One such is the use of manned submarines for light intervention tasks. The submarine is completely independent of the surface ... -
Wave-induced nonlinear effects on a pontoon-type Very Large Floating Structures (VLFS)
(Doktoravhandlinger ved NTNU, 1503-8181; 2011:61, Doctoral thesis, 2011)The wave-induced nonlinear effects on the pontoon-type Very Large Floating Structure (VLFS) is investigated in this thesis. Typical dimensions of the pontoon-type VLFS such as a floating airport are 5000m in length, 2000m ... -
Productivity-improving measures on steel-structures in ships and their relative effect on the CO2-emissions over a lifespan
(Master thesis, 2011)Although maritime transport are surely the most environmentally friendly way to transport , number of tones cargo shipped versus total CO2 emissions, is it great opportunities and possibilities for further improvement. A ... -
Analytical and numerical analysis of iceberg collisions with ship structures
(Doktoravhandlinger ved NTNU, 1503-8181; 2011:235, Doctoral thesis, 2011)The scope of the present Ph.D. thesis was to investigate the mechanics of collisions between icebergs and ship structures. Large reservoirs of oil and gas and new sailing routes in the Arctic area are two large motivations ... -
Structural Reliability Analysis of Intact and Damaged Ships in A Collision Risk Analysis Perspective
(Doktoravhandlinger ved NTNU, 1503-8181; 2011:17, Doctoral thesis, 2011)Risk-based design is growing in importance due to the need of obtaining measures of the safety to aid making decisions regarding the optimal balance between safety and economy. Design against Accidental Limit State (ALS) ... -
Mixing processes in dense overflows with emphasis on the Faroe Bank Channel overflow
(Doktoravhandlinger ved NTNU, 1503-8181; 2011:35, Doctoral thesis, 2011)The amount and distribution of mixing and entrainment that the overflows across the Greenland-Scotland Ridge encounter influence the ventilation of the deep North Atlantic. Constituting about 30% of the total overflow ... -
Dynamic Response Analysis of an Offshore Wind Turbine
(Master thesis, 2011)The offshore wind power is an attractive renewable energy resource. To improve the wind power generation capacity, there is a strong desire for offshore wind turbine to go to deep waters. For offshore fixed wind turbine, ...