Institutt for marin teknikk
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Minimum leading edge protection application length to combat rain-induced erosion of wind turbine blades
(Peer reviewed; Journal article, 2021)Leading edge erosion (LEE) repairs of wind turbine blades (WTBs) involve infield application of leading edge protection (LEP) solutions. The industry is currently aiming to use factory based LEP coatings that can applied ... -
Feasibility of mooring system optimization for floating wind turbines in deep water based on static analysis
(Master thesis, 2021)The goal of this thesis is to investigate the feasibility of optimizing the mooring line characteristics of a semi-taut (chain – polyester – chain) mooring system in combination with drag embedded anchors for a 12 MW wind ... -
Strategies on Methane Slip Mitigation of Spark-Ignition Natural Gas Engine during Transient Motion
(Peer reviewed; Journal article, 2021)The liquefied natural gas (LNG)-fueled ships were provisioned to meet the strict emission legislation in the marine application since 2000. However, the scientific approach of burning the low-emission natural gas in lean ... -
Fuel consumption and emission reduction of marine lean-burn gas engine employing a hybrid propulsion concept
(Peer reviewed; Journal article, 2021)As the emission legislation becomes further constraining, all manufacturers started to fulfill the future regulations about the prime movers in the market. Lean-burn gas engines operating under marine applications are also ... -
Evaluating port development strategies for a modal shift: a Norwegian case study
(Peer reviewed; Journal article, 2020)We study the design of a multi-modal distribution network for the transportation of incoming containers from a container terminal to nearby customer regions. The motivation for the study has been the relocation of the ... -
Dynamic Positioning using Deep Reinforcement Learning
(Journal article; Peer reviewed, 2021)This paper demonstrates the implementation and performance testing of a Deep Reinforcement Learning based control scheme used for Dynamic Positioning of a marine surface vessel. The control scheme encapsulated motion control ... -
Supplementing remote sensing of ice: Deep learning-based image segmentation system for automatic detection and localization of sea ice formations from close-range optical images
(Peer reviewed; Journal article, 2021)This paper presents a three-stage approach for the automated analysis of close-range optical images containing ice objects. The proposed system is based on an ensemble of deep learning models and conditional random field ... -
Seamless integration of design and Kirchhoff–Love shell analysis using analysis-suitable unstructured T-splines
(Peer reviewed; Journal article, 2020)Analysis-suitable T-splines (ASTS) including both extraordinary points and T-junctions are used to solve Kirchhoff–Love shell problems. Extraordinary points are required to represent surfaces with arbitrary topological ... -
Hierarchically refined isogeometric analysis of trimmed shells
(Peer reviewed; Journal article, 2020)This work focuses on the study of several computational challenges arising when trimmed surfaces are directly employed for the isogeometric analysis of Kirchhoff–Love shells. To cope with these issues and to resolve ... -
Theoretical and experimental study of wind turbine drivetrain fault diagnosis by using torsional vibrations and modal estimation
(Peer reviewed; Journal article, 2021)This paper provides an analytical proof and the theoretical development of the idea of using the torsional vibration measurements for a system-level condition monitoring of the drivetrain system. The method relies on modal ... -
Wall Modeled Large Eddy Simulation of Viscous Flow on the BeVERLI Hill Geometry
(Master thesis, 2021)I denne masteroppgaven har vegg-modellert LES blitt brukt til å simulere den viskøse strømningen over BeVERLI hill geometrien. BeVERLI hill er en veggmontert «bump» som blir brukt i valideringsstudier av turbulente separerte ... -
Risk in context to autonomous vessels in transit
(Master thesis, 2021)Det overordnede temaet for denne oppgaven er risikoen som blir introdusert når autonome systemer tas i bruk. Oppgaven gir en grundig forklaring til bakgrunnen innen feltet og utviklingen gjennom årene. Oppgaven illustrerer ... -
Environmental Effect of Extending the Lifetime of an FPSO by the Use of Life Cycle Assessment
(Master thesis, 2021)Det finnes lite informasjon og data om miljøpåvirkningen fra et flytende produksjonsskip (FPSO) i et livsløpsperspektiv. Denne mangelen på informasjon gjør det vanskelig å forstå hvordan bruken av en FPSO påvirker miljøet. ... -
A Comparison Of How Different DesignedCages Affect The Salmon Welfare
(Master thesis, 2021)Denne master oppgaven ser på kommersielle fleksible merder og sammenligner disse med Briljant merden laget av Roxel Aqua. Det overordnede målet for oppgaven er å se på hvordan velferden til laks blir påvirket ved bruk av ... -
Examination of Complex High Reynolds Number Wall-Bounded Adverse Pressure Gradient Flow Using Advanced Measuring Techniques
(Master thesis, 2021)Denne masteroppgaven er den del av et pågående NATO STO (Science and Technology Organisation) samarbeidsprosjekt mellom Virginia Tech, NTNU/SINTEF Ocean og University of Toronto. Målet med dette prosjektet er å lage CFD ... -
Applicability of Machine Learning Algorithms for the Capesize Shipping Segment
(Master thesis, 2021)Denne avhandlingen undersøker anvendeligheten til utvalgte maskinlæringsalgoritmer for å kunne forutsi kortsiktige bevegelser i fraktrater ved Capesize-ruten mellom Tubarao og Qingdao (C3). Med et utgangspunkt i markedsstørrelse, ... -
Spectral wave modelling for determining wave exposure in Norwegian aquaculture
(Master thesis, 2021)Det ble utført en sensitivitetsstudie på bølgemodellen SWAN, slik den blir brukt for lokalitetsanalyser i norsk akvakultur. To lokasjoner ble valgt for studien. På begge lokasjonene var lokalitetsanalyser allerede gjennomført ... -
Hybrid Observers for Autonomous Surface Vessels Experiencing Varying Operational Conditions
(Master thesis, 2021)Denne masteroppgaven tar for seg bruk av hybrid kontrollteori for å forbedre observer-ytelse i transienter på grunn av varierende operasjonelle forhold for marine overflatefartøy. Oppgaven begynner med litteraturstudie ... -
Insight Into Fish Welfare At Potential Farming Sites A Simulation-Based Approach
(Master thesis, 2021)Formålet med denne oppgaven har vært å studere hvordan en kan bruke tilgjengelig forskning om oppdrett av Atlantisk laks for å få økt innsikt i fiskevelferden på potensielle oppdrettslokaliteter. Ansvarlig teknologisk ... -
Terrain-Based Navigation for Unmanned Underwater Vehicles Using Visual Simultaneous Localization and Mapping
(Master thesis, 2021)Denne avhandlingen ser nærmere på robustheten til visuell simultan lokalisering og kartlegging (V-SLAM) for navigasjon av ubemannede undervannsfarkoster, samt bildebehandlingsmetoder som er velegnede for V-SLAM under vann. ...
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