Blar i Institutt for marin teknikk på tittel
Viser treff 2499-2518 av 3413
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A physics-, SCADA-based remaining useful life calculation approach for wind turbine drivetrains
(Peer reviewed; Journal article, 2022)This paper describes the development of a physics-, SCADA-based model able to predict the expected lifetime for wind turbine drivetrains. A real-time coupled torsional gearbox-generator model is developed using the bond ... -
Pigment Composition of Macroalgae from a Norwegian Kelp Forest
(Master thesis, 2014)Variation in pigment composition between seasons in 10 different species of macroalgae was examined using high precision liquid chromatography (HPLC). In addition, a study on the variation of pigment quantity and quality ... -
Pile tip deformation caused by obstacles
(Master thesis, 2018)To identify the pile tip deformation, a finite element model is established. Six volume elements over the thickness are required at the contact zone to model the pile-boulder interaction accurately. Axial- and lateral soil ... -
Pilot study of ice-structure interaction in a pendulum accelerator
(Journal article; Peer reviewed, 2015)More knowledge on the coupled response of ice and structure in collision in which both bodies undergo permanent damage is needed. These types of experiments are challenging to perform in a laboratory at relatively high ... -
Pipeline Accidental Load Analysis
(Master thesis, 2011)Ship interaction in terms of anchor hooking on a subsea pipeline has been investigated in this thesis. An attempt has been made to predict the most probable anchor interaction loads on the Kvitebjørn gas pipeline in the ... -
Pipeline damage assessment after trawling impact
(Master thesis, 2018)Bulking av subsea-rørledning på grunn av kollisjon med trålere kan ha en betydelig effekt på den gjenverende utmattings-levetiden til røret. Kriterie som benyttes til å avgjøre om et rør et sikkert etter bulking har innebyg ... -
Pipeline Free Span Fatigue Based on DNV RP & Time Domain VIV Modelling Procedures
(Master thesis, 2023)Fritt spennende undervannsrør er utsatt for ulike miljøbelastninger, hvorav virvelinduserte vibrasjoner (VIV) er en av de viktigste bidragsyterne til utmattingssvikt. VIV er et selvutløsende fenomen forårsaket av samspillet ... -
Pipeline Integrity Assessment of Dent with Gouge after Trawling Impact
(Master thesis, 2017)Damage to pipelines from interaction with trawler-gear affects the long-term integrity of the pipeline, and interference from trawling-equipment on subsea pipelines is a relatively common occurrence. This thesis looks on ... -
Pipeline Walking of High Pressure/Temperature Flowlines
(Master thesis, 2013)The offshore pipeline industry are facing more complex design challenges as the oiland gas industry moves into deeper water in search for hydrocarbons. One of thesechallenges are related to high pressure/high temperature ... -
Pitting corrosion identification approach based on inverse finite element method for marine structure applications
(Peer reviewed; Journal article, 2023)This paper presents a state-of-the art inverse finite element method (iFEM) for full-field, real-time structural health monitoring (SHM) of corroding structures. The study focuses on detecting the location and identifying ... -
Planlegging av Arktiske operasjoner: Fiskeflåtens og Polarkodens påvirkning av Arktiske operasjoner
(Master thesis, 2013)Med krympingen av den Arktiske isen, utvides mulighetene for aktivitet i området. Fiskefartøy har vært i Arktis lenge, og ved at området er isfritt lengre, åpnes det for en lengre driftsperiode i nordområdene. Denne fordelen ... -
Planning and disruption challenges in the logistical offshore supply chain based on a simulation model
(Master thesis, 2013)The offshore industry is a dynamic industry with constant demand changes. This creates many challenges, one of them being logistical supply planning. The need changes fast and this makes it important to receive the deliveries ... -
PM emissions and NOx-reduction due to water in fuel emulsions in marine diesel engines
(Master thesis, 2010)The goal of this M.Sc. thesis has been to study the NOx-reduction measure: water in fuel emulsion. There has been done a literature study to look into the function, system components and effect upon NOx reduction, specific ... -
Post Behaviour of Anchors Hooked by Pipelines
(Master thesis, 2021)De siste tiårene har utviklingen av undersjøiske installasjoner økt i sammenheng med reduksjon i kostnaden for etablering av dem. I samme tidsrom, og for fremtiden, vil det være en økning av seilaser i Nordsjøen grunnet ... -
Post‐installation adaptation of offshore wind turbine controls
(Journal article; Peer reviewed, 2020)The cost of offshore wind energy can be reduced by incorporating control strategies to reduce the support structures' load effects into the structural design process. While effective in reducing the cost of support structures, ... -
Potential energy savings of air lubrication technology on merchant ships
(Peer reviewed; Journal article, 2023)As the reduction of greenhouse gas emissions has become an important issue, measures and devices to reduce energy consumption are in increasing demand. In this study, the potential energy saving due to the application of ... -
A Potential Flow Method Combining Immersed Boundaries and Overlapping Grids: Formulation, Validation and Verification
(Peer reviewed; Journal article, 2021)A fully nonlinear two-dimensional numerical method based on potential-flow theory for water waves and their interaction with surface-piercing rigid bodies is presented. The harmonic polynomial cell (HPC) method is used to ... -
Potential for codends with shortened lastridge ropes to replace mandated selection devices in demersal trawl fisheries
(Peer reviewed; Journal article, 2021)In many trawl fisheries, codend size selectivity is supplemented by adding selection devices to the gear. In the Barents Sea gadoid fishery, combining diamond mesh codends with sorting grids is compulsory. However, the use ... -
Potential power setups, fuels and hull designs capable of satisfying future EEDI requirements
(Journal article; Peer reviewed, 2018)Maritime emission regulations set limits for SOx and NOx emissions for health and environmental reasons, and for CO2, through the Energy Efficiency Design Index (EEDI), with the general aim of mitigating global warming. ... -
Potential-Flow Predictions of a Semi-Displacement Vessel Including Applications to Calm-Water Broaching
(Doktoravhandlinger ved NTNU, 1503-8181; 2013:155, Doctoral thesis, 2013)As a marine vehicle’s operational speed increases, hydrodynamic pressure plays an increasingly significant role in carrying the vessel’s weight. The shift of importance from hydrostatic to hydrodynamic pressure may cause ...