Institutt for marin teknikk: Recent submissions
Now showing items 141-160 of 3472
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Prediction of increased fuel consumption due to fouling of hull and propeller
(Master thesis, 2023)The escalating demand for shipping in recent decades, accompanied by the industry’s growing environmental footprint, has compelled numerous organizations and companies to explore effective decarbonization strategies. To ... -
Assessing some statistical and physical modelling uncertainties of extreme responses for monopile-based offshore wind turbines, using metocean contours
(Peer reviewed; Journal article, 2024)This study examines the influence of probabilistic models for wave parameters in the joint environmental model and hydrodynamic/soil models on extreme mudline bending moments for monopile-based wind turbines at representative ... -
Integration methods for floating offshore wind farms
(Master thesis, 2023)Antallet flytende havvindparker under utvikling har økt drastisk de siste årene etter hvert som teknologien har blitt levedyktig for pre-kommersielle og kommersielle prosjekter. Prosjekter av denne størrelsen krever en ... -
Shear lag effects on global bending moments in a long-span pontoon bridge under self-weight, traffic and environmental loads
(Peer reviewed; Journal article, 2023)The present paper deals with a systematic study of the shear lag effect on the bending moment distribution in girders of representative pontoon-type floating bridges (PTFBs). Comparative and parametric studies for ... -
Konsekvensklassifisering og FMECA av fôrflåte
(Bachelor thesis, 2023)Formålet med oppgaven var å identifisere sviktmoder på ett av Mowi sine anlegg, for videre å finne relevante tilstandsparametere. På bakgrunn av dette var det ønskelig at gruppen skulle komme med forslag til kriterier for ... -
Floating wind turbine optimization via surrogate modelling
(Master thesis, 2023)In recent years, the interest in deep-water wind energy projects has drastically increased, driven by the considerable wind resource in deep-water locations. In such locations, floating wind turbines are more economically ... -
Comparison of the dynamic wake meandering model against large eddy simulation for horizontal and vertical steering of wind turbine wakes
(Peer reviewed; Journal article, 2023)Accurately predicting the evolution of wake is crucial for power output and structural load estimation in wind farms. This study aims to validate the dynamic wake meandering (DWM) model, an efficient mid-fidelity wake ... -
Comparing the Utility of Coupled Aero-Hydrodynamic Analysis Using a CFD Solver versus a Potential Flow Solver for Floating Offshore Wind Turbines
(Peer reviewed; Journal article, 2023)There has been a great effort towards development of renewable energy systems to combat global warming with significant interest towards research and development of floating offshore wind turbines (FOWTs). With commercial ... -
Hydrostatic Stability and Hydrodynamics of a Floating Wind Turbine Platform Integrated with Oscillating Water Columns: A Design Study
(Peer reviewed; Journal article, 2024)One of the challenges in the installation of Floating Wind Turbines (FWTs) is the occurrence of undesired resonant motions under environmental conditions, which adversely impact their lifespan, maintenance cost, components ... -
Model-Based Design of Marine Hybrid Power Systems - With a case study of DC Grid Architecture and Control
(Doctoral theses at NTNU;2023:346, Doctoral thesis, 2023)Marine electrification and hybridization with DC power systems topology are still under development with advanced power electronics, energy storage systems (ESS), and their associated controllers to cope with stricter ... -
Monitoring the Growth of Coastal Algae Blooms in Harsh Weather Conditions Using a Wave-Propelled ASV: Challenges and Lessons Learned
(Peer reviewed; Journal article, 2023)This article presents the experience gathered on a 19-day-long field campaign with the wave-propelled, solar-powered, autonomous surface vehicle AutoNaut. The operation was conducted in Frohavet, a semienclosed sea along ... -
A multi-period fleet retrofit and renewal problem for strategic green corridor planning and emission control in maritime shipping
(Master thesis, 2023)I denne masteroppgaven har vi utviklet en flerperiodisk modell for oppgradering og fornyelse av den maritime flåten. Målet med modellen er å gi verdifull innsikt i strategisk planlegging av grønne korridorer og generelle ... -
A multi-period fleet retrofit and renewal problem for strategic green corridor planning and emission control in maritme shipping
(Master thesis, 2023)I denne masteroppgaven har vi utviklet en flerperiodisk modell for oppgradering og fornyelse av den maritime flåten. Målet med modellen er å gi verdifull innsikt i strategisk planlegging av grønne korridorer og generelle ... -
Abnormal wave slamming impact of stiffened cylinders
(Chapter, 2023)The structural response of a stiffened cylinder due to slamming impact is studied using the ALE method in LS-Dyna. The numerical modelling approach is in the first place verified against experimental results from unstiffened ... -
Time-domain floater stress analysis for a floating wind turbine
(Peer reviewed; Journal article, 2023)There are increasing focuses on developing cost-effective floating wind turbines, for which efficient stress analysis methods are needed for floater structural design. Most of the today's studies focus on global analysis ... -
Streamlined semi-automatic data processing framework for ship performance analysis
(Peer reviewed; Journal article, 2023)The hydrodynamic performance of a sea-going ship can be analyzed using data from different sources, like onboard recorded in-service data, AIS data, and noon reports. Each of these sources is known to have its inherent ... -
A Decentralized Droop-Based Power Management System for Ship Power Systems Using Hybrid Dynamical Systems Framework
(Chapter, 2023)In maritime transport, inspired by the automobile sector, autonomy is gaining traction in parallel with decarbonization. One of the numerous challenges in realizing fully autonomous operation in shipping is to design a ... -
Buckling and Post-Buckling Behaviour of Extruded Aluminium Panels Subject to the Combined Effects of Welding and Pitting Corrosion
(Chapter, 2023)The present study investigates the effects of pitting corrosion and welding, both independently and combined, on the buckling and post-buckling behaviour of extruded aluminium panels. For this purpose, a finite element ... -
How Loads Interact? A Numerical Investigation of Aluminum Stiffened Panels Under Bi-Axial and Lateral Loads
(Chapter, 2023)Due to low weight, aluminum alloys are commonly used to build ferries, working boats and high-speed ships. The hull of such vessels can be designed as catamaran and trimaran for favorable hydrodynamical behavior and ... -
Risk-based supervisory control for autonomous ship navigation
(Peer reviewed; Journal article, 2023)This paper proposes a novel method to transform the results of qualitative risk analysis into a numeric optimal control problem for autonomous ship navigation. Today, making autonomous high-level decisions replacing a crew ...