Browsing Institutt for marin teknikk by Title
Now showing items 2338-2357 of 3421
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Offshore wind turbine operations and maintenance: A state-of-the-art review
(Peer reviewed; Journal article, 2021)Operations and maintenance of offshore wind turbines (OWT) play an important role in the development of offshore wind farms. Compared with operations, maintenance is a critical element in the levelized cost of energy, given ... -
Offshoring Strategies in Norwegian Ship Production
(Journal article; Peer reviewed, 2018)For the past several decades, Norwegian shipyards have focused on innovative, customized, and technologically advanced ships, often serving the offshore oil and gas industry. Usually, a significant part of the ship production ... -
Oil spill damage: a collision scenario and financial liability estimations for the Northern Sea Route area
(Peer reviewed; Journal article, 2020)The global demand in energy resources is moving the petroleum industry to the Arctic with its huge resource potential. The lack of infrastructure onshore increases the role of the Arctic marine shipping and the importance ... -
OMAE2017-61362 Consolidation of Empirics for Calculation of VIV Response
(Chapter; Peer reviewed, 2017)The present paper consolidates available experimental results for both sub-critical and critical Reynolds numbers and varying surface roughness and formulates a coefficient excitation model that aims at unbiased response ... -
OMAE2017-61659 Classification of Aquaculture Locations in Norway With Respect to Wind Wave Exposure
(Chapter; Peer reviewed, 2017)In Norway there are a total of 1070 registered sites for salmon farming all along the coast. Trends in the aquaculture industry in the recent decade are that salmon farming sites tend to gradually relocate to more wave and ... -
OMAE2017-61715 Improved in-line VIV Prediction for combined in-line and Cross-Flow VIV Responses
(Chapter; Peer reviewed, 2017)Slender marine structures are subjected to ocean currents, which can cause vortex-induced vibrations (VIV). Accumulated damage due to VIV can shorten the fatigue life of marine structures, so it needs to be considered in ... -
OMAE2017-61845 Risk Management in Aquaculture: Integrating Sustainability Perspectives
(Chapter; Peer reviewed, 2017)The aquaculture industry in Norway produced 1.3 million metric tons of fish in 2014, and further expansion is expected if the main sustainability challenges related to production and operation are mitigated. Major biological, ... -
OMAE2017-62307 - Design Parameters for Increased Operability of Offshore Crane Vessels
(Chapter; Peer reviewed, 2017)Marine subsea operations are performed by highly specialized ships, referred to as Inspection, Maintenance, and Repair (IMR) and Offshore Construction Vessels (OCV). Although the ships and their on-board equipment are ... -
OMAE2017-62390 - Study of an Entrapped Air Pocket due to Sloshing Using Experiments and Numerical Simulations
(Chapter; Peer reviewed, 2017)The capability of the OpenFoam software to model slamming where air is entrapped between the free surface and the structure is investigated. The test case studied is a previously studied phenomenon, where an air pocket is ... -
OMAE2017-62498 Real-Time Hybrid Model Testing of a Top Tensioned Riser: a Numerical Case Study on Interface Time-Delays and Truncation Ratio
(Chapter; Peer reviewed, 2017)This paper investigates the applicability of real-time hybrid model testing (ReaTHM testing) to the study of offshore systems in deep water. The focus is in particular on slender marine structures connecting floating ... -
OMAE2017-62644 The Effect of Stick Stiffness of Friction Models on the Bending Behavior in Non-Bonded Flexible Risers
(Chapter; Peer reviewed, 2017)This paper investigates the effect of stick stiffness on the bending behavior in non-bonded flexible risers. The stick stiffness was normally implemented in the friction model for calculating the friction stress between ... -
On a Decision-support System for Early Warning of the Risk of, and Growth-rate of, Icing on a Ship?s Superstructure
(Master thesis, 2013)Arctic regions represent a challenging environment for marine operations and icing of the superstructure on ships and rigs constitute one of these challenges. Icing on ships and structures can either be generated from ... -
On a layer model for spilling breakers: a preliminary experimental analysis
(Journal article; Peer reviewed, 2018)Accurate and reliable experimental data of a sloshing-induced, rapidly-evolving spilling breaker, are used to understand the specific physics of this phenomenon and to partially evaluate a simplified analytical model by ... -
On a shifting pressure-area relationship for the accidental limit state analysis of abnormal ice actions
(Chapter, 2017)The relationship between pressure and area is often used to describe various ice-structure interaction processes. With knowledge of the nominal contact area and the force, a continuous plot of average pressure versus ... -
On acoustic equilibria
(Journal article, 2019)The present paper generalises mathematical theory of vibroequilibria onto the case of the acoustically-driven interface between ullage gas and liquid in a container -
On application of digital twin in ship operation and performance
(Master thesis, 2022)Shipping er en voksende industri og står for over 90% av verdenshandelen i dag. Stramme tidsskjemaer i havn og lange reiseavstander er typisk innen transportering, og derfor er effektivitet svært viktig for å opprettholde ... -
On characteristics of ice ridges and icebergs for design of ship hulls in polar regions based on environmental design contours
(Journal article; Peer reviewed, 2021) -
On Correlation and Underlying Physics
(Chapter, 2019) -
On Design and Analysis of a Drivetrain Test Rig for Wind Turbine Health Monitoring
(Chapter, 2019)The reliability of offshore wind turbines is a key factor when estimating maintanence costs, downtime due to component failure and overall efficiency during operational life. Offshore wind turbines have limited accessibility ...