Browsing Institutt for marin teknikk by Title
Now showing items 2938-2957 of 3421
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Stability assessment of anchor handling vessels during operations
(Journal article; Peer reviewed, 2018)To ensure safety in anchor handling operations, maintaining anchor handling vessel stability is recognized as a critical and complex task. The vessel’s stability depends primarily on the vessel’s design and operational ... -
Stability Monitoring during Ice Accretion
(Master thesis, 2015)Abstract The aim of this study is to link the impact of ice accretion on ship motion with its impact on static stability. If such links are demonstrated, ship motion may be applied in more basic and affordable stability ... -
State-of-the-art design methods for wind turbine towers
(Master thesis, 2015)The costs of wind energy have to be reduced in order to be competitive with conventional methods to generate electricity. The tower costs contribute significantly to the costs of a wind turbine. This thesis aims to suggest ... -
State-of-the-Art on Artificial Intelligence for Risk-based Decision-making in Autonomous Marine Vehicles
(Chapter, 2020)Risk assessment (i.e., risk analysis and risk evaluation) is routinely performed in marine operations by vessel crews to inform and support the decision-making process for the ship’s operations. With the inevitable ubiquity ... -
State-of-the-Art Review of Vortex-Induced Motions of Floating Offshore Wind Turbine Structures
(Peer reviewed; Journal article, 2022)The motivation for this study is the fast development of floating offshore wind energy and the immature methodology and engineering practice related to predictions of vortex-induced motions (VIM). Benefiting from the oil ... -
Static analysis of interaction between two adjacent top tensioned risers with consideration of wake effects
(Peer reviewed; Journal article, 2019)Collision between adjacent risers has become an important issue as the oil and gas industry moves to deeper waters. In order to estimate the clearance between two marine risers, a static analysis which is mainly concerned ... -
Station-Keeping using Deep Learning
(Master thesis, 2019)Denne oppgaven undersøker muligheten for å skape en kontroller for et fjernstyrt undervannsfartøy (ROV) med en dyp forsterkningsinlæringsmetode, nærmere bestemt ved hjelp av en Proximal Policy Optimisation (PPO) ... -
Statisk og Dynamisk Responsanalyse av Salmar Offshore Havbruksanlegg
(Master thesis, 2019)Den norske havbruksnæringen har nådd et punkt der videre vekst av næringen ikke lenger ansees som bærekraftig. Samtidig er næringen forventet å produsere større kvanta for å mate den stadig voksende verdensbefolkningen. ... -
Statistical and Modelling Uncertainties in the Design of Offshore Wind Turbines
(Doctoral theses at NTNU;2018:409, Doctoral thesis, 2018)This thesis aims to contribute to lowering the cost of offshore wind energy by minimizing design conservatism. By increased confidence in the structural design, the total cost of energy can be reduced through less material ... -
Statistical fault diagnosis of wind turbine drivetrain applied to a 5MW floating wind turbine
(Journal article; Peer reviewed, 2016)Deployment of larger scale wind turbine systems, particularly offshore wind turbine, requires more organized operation and maintenance strategies to make it as competitive as the classical electric power stations. It is ... -
Statistical modeling of Ship’s hydrodynamic performance indicator
(Peer reviewed; Journal article, 2021)The traditional method used to estimate the hydrodynamic performance of a ship uses either the model test results or one of the many empirical methods to estimate and observe the trend in fouling friction coefficient () ... -
Statistical modelling of extreme ocean current velocity profiles
(Journal article; Peer reviewed, 2019)Knowledge about extreme ocean currents and their vertical structure is important when designing offshore structures. We propose a method for statistical modelling of extreme vertical current velocity profiles, accounting ... -
Statistical properties of successive ocean wave parameters
(Doctoral thesis, 2003)For random waves the free surface elevation can be described by a number of individual wave parameters. The main objective of this work has been to study the statistical properties of individual parameters in successive ... -
STATISTICS OF BENDING MOMENT IN THE SPLASH ZONE OF A TENSIONED RISER
(Master thesis, 2014)The main idea of SLTS method is to find a design storm that the extreme responses of a structure in its design lifetime can be obtained from this seastate, instead of performing full long-term time-domain dynamic analysis. ... -
Statistics of surf parameter and wave power for individual waves
(Master thesis, 2014)In this thesis, the theoretical bivariate distribution of surf parameter and wave height is derived from a theoretical joint distribution of wave height and wave period based on narrow band approximation. Statistical ... -
Statistics of thickness and strength of first-year ice along the Northern Sea Route
(Peer reviewed; Journal article, 2020)In this paper, statistics of ice thickness and ice strength of first-year sea ice along the Northern Sea Route (NSR) is studied to provide useful information for the design and operation of Arctic ships. Specifically, ice ... -
Statistics of thickness and strength of first-year ice along the Northern Sea Route
(Peer reviewed; Journal article, 2020)In this paper, statistics of ice thickness and ice strength of first-year sea ice along the Northern Sea Route (NSR) is studied to provide useful information for the design and operation of Arctic ships. Specifically, ice ... -
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 ... -
Steady State Motion Analysis of an Offshore Wind Turbine Transition Piece During Installation Based on Outcrossing of the Motion Limit State
(Chapter; Peer reviewed, 2015)Installation of OffshoreWind Turbine structural components need to be executed in sea states for which their dynamic responses are expected to remain within a safe domain or perform a limited number of outcrossings from ... -
Steady-State Resonant Sloshing in an Upright Cylindrical Container Performing a Circular Orbital Motion
(Journal article; Peer reviewed, 2018)The nonlinear Narimanov-Moiseev multimodal equations are used to study the swirling-type resonant sloshing in a circular base container occurring due to an orbital (rotary) tank motion in the horizontal plane with the ...