Institutt for marin teknikk: Recent submissions
Now showing items 81-100 of 3421
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A Comparative Study of the Energy Efficiency of Hydrofoil Vessels and Slender Catamarans
(Chapter, 2023)The transition to zero-emission energy systems introduces new challenges in fast ferry design, particularly in relation to the increased weight and cost associated with stored and consumed energy. Hydrofoils may address ... -
Yaw misalignment in powertrain degradation modeling for wind farm control in curtailed conditions
(Peer reviewed; Journal article, 2024)A framework characterizing the degradation of wind turbines for use in multiple-input damage-aware farm control is suggested. The focus is on the fatigue damage of the powertrain (drivetrain + generator) system, but the ... -
An Efficient Method for Unsteady Hydrofoil Simulations, based on Non-Linear Dynamic Lifting Line theory
(Journal article; Peer reviewed, 2023)This paper presents a Non-linear Dynamic Lifting Line (NDLL)-based method for analysing hydrofoil vessels in waves. The method is validated, and its utility is demonstrated in a case study. The NDLL accounts for dynamic ... -
An Efficient Method for Design and Powering Prediction of Fast Slender Catamarans
(Journal article; Peer reviewed, 2023)This paper presents a parameterized and mathematically defined hull shape that can be tuned to represent modern passenger fast ferries. Additionally, a resistance calculation model for high-speed slender round-bilge ... -
A new power prediction method using ship in-service data: a case study on a general cargo ship
(Journal article; Peer reviewed, 2023)To increase energy efficiency and reduce greenhouse gas (GHG) emissions in the shipping industry, an accurate prediction of the ship performance at sea is crucial. This paper proposes a new power prediction method based ... -
Sufficient conditions for uniform asymptotic stability and input-to-state stability using high-order control barrier functions
(Peer reviewed; Journal article, 2023)Control barrier functions (CBFs) ensure safety of controlled dynamical systems by enforcing forward invariance of safe subsets of the state space. First-order CBFs are applicable for systems where the control input appears ... -
How Free Swimming Fosters the Locomotion of a Purely Oscillating Fish-like Body
(Journal article, 2023)The recoil motions in free swimming, given by lateral and angular rigid motions due to the interaction with the surrounding water, are of great importance for a correct evaluation of both the forward locomotion speed and ... -
A Novel Data-Driven Prediction Framework for Ship Navigation Accidents in the Arctic Region
(Peer reviewed; Journal article, 2023)Arctic navigation faces numerous challenges, including uncertain ice conditions, rapid weather changes, limited communication capabilities, and lack of search and rescue infrastructure, all of which increase the risks ... -
Analysis of loads encountered during a single lift operation of offshore wind turbines.
(Master thesis, 2023)The success of offshore wind farm installations is often related to the costs and time taken to be completed. Current installation strategies require several critical offshore lifts for the completion of a single wind ... -
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 ...