Browsing Institutt for marin teknikk by Title
Now showing items 61-80 of 3410
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A Hydro-Aerodynamic Analysis of a Floating Offshore Wind Turbine to Assist in Floater Selection
(Master thesis, 2022)Ulike typer fundamenter er foreslått til flytende vindturbiner. Hovedtyngden av markedsaktiviteten er "Semi-submersible" fundamenter, hvor hvert konsept har sine fordeler og ulemper med hensyn til designet. Denne oppgaven ... -
A large scale simulation of floe-ice fractures and validation against full-scale scenario
(Journal article; Peer reviewed, 2018)While interacting with a sloping structure, an ice floe may fracture in different patterns. For example, it can be local bending failure or global splitting failure depending on the contact properties, geometry and confinement ... -
A Method for Detecting Near-Misses from AIS Data
(Master thesis, 2019)Konsekvensene av maritime ulykker kan være enorme med hensyn til tap av liv, økonomiske tap og miljøskader. Derfor har forbedring av sikkerheten til sjøs vært et fokus i mange år, og det har vært utført ulike maritime ... -
A Method for Determining the Mode Shapes from a Finite Element Model for Use in a Finite-Mode Vibration Simulation Model
(Master thesis, 2016)In this thesis, a methodology for retrieving mathematical expressions of the mode shapes of a crankshaft based on numerical data yielded by a finite element model is presented and tested. The mode functions should be used ... -
A method for estimation of equivalent-volume ice thickness based on WMO egg code in absence of ridging parameters
(Journal article; Peer reviewed, 2018)When calculating equivalent-volume ice thickness along a vessel's projected route for the purpose of ice resistance estimation, information on both undeformed ice (level ice) and deformed ice (mainly ridges) is needed. ... -
A method for evaluating the potential for retrofitting Wind Assisted Ship Propulsion from a ship owner perspective
(Master thesis, 2022)Skipsfart står for nesten 3% av de totale menneskeskapte utslippene av karbondioksid, og aktører innenfor den maritime næringen er under press for å finne løsninger for å redusere disse utslippene. Et lovende konsept for ... -
A method for real-time estimation of full-scale global ice loads on floating structures
(Journal article; Peer reviewed, 2018)This paper proposes an algorithm that uses conventional measurements found on-board ships coupled with additional Inertial Measurement Units to estimate the motions and global loads acting on them. The work is motivated ... -
A Modular Design Methodology for OSV Accommodation Areas
(Master thesis, 2012)Offshore shipbuilding industry is known for its highly customized products, which are in most cases tailor-made for specific missions. Being a traditionally conservative industry, it follows conventional design practices. ... -
A multi-body dynamic model based on bond graph for maritime hydraulic crane operations
(Chapter; Peer reviewed, 2015)This paper presents a bond graph model of a maritime crane lifting system comprised of a 3DOFs crane with three revolute joints, a winch, a segment of wire, and a pendulum load. The multi-body model contains the dynamic ... -
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 ... -
A Multibeam-Based SLAM Algorithm for Iceberg Mapping Using AUVs
(Journal article; Peer reviewed, 2018)Using autonomous underwater vehicles (AUVs) for mapping underwater topography of sea-ice and icebergs, or detecting keels of ice ridges, is foreseen as enabling technology in future Arctic marine operations. Wind, current, ... -
A multiple model adaptive architecture for the state estimation in discrete-time uncertain LPV systems
(Journal article, 2017)This paper addresses the problem of multiple model adaptive estimation (MMAE) for discrete-time linear parameter varying (LPV) systems that are affected by parametric uncertainty. The MMAE system relies on a finite number ... -
A natural framework for isogeometric fluid-structure interaction based on BEM-shell coupling
(Journal article; Peer reviewed, 2017) -
A new combination of conditional environmental distributions
(Journal article, 2018)In this paper, a joint distribution of all relevant environmental parameters used in design of offshore structures including directional components is presented, along with a novel procedure for dependency modelling between ... -
A new method for underwater archaeological surveying using sensors and unmanned platforms
(Journal article; Peer reviewed, 2016)As most of the world’s oceans are inaccessible to diving archaeologists, we must rely on advanced underwater technology and marine robotics to explore, map and investigate ship wrecks in these areas. New sensors and unmanned ... -
A New Small-Scale LNG Distribution and Bunkering Facility: - An Approach to Risk Based Design and Verification
(Master thesis, 2013)LNG is the preferred solution to meet environmental requirement and a great market growth is expected within few years. Lack of suitable infrastructure, regulation and bunkering practices poses challenges to the industry, ... -
A novel methodology for robust dynamic positioning of marine vessels: theory and experiments
(Journal article, 2013)The paper describes a novel robust adaptive controller for Dynamic Positioning (DP) of marine vessels. The proposed Robust Multiple Model Adaptive Dynamic Positioning (RMMADP) structure consists of a bank of robust controllers ... -
A Numerical and Experimental Study of a Multi-torus Floating Solar Island Concept
(Master thesis, 2019)En flytedel som skal brukes til plattform for en flytende soløy er testet i modellskala både med og uten solcellepaneldekket. En realistisk skalert membran er brukt for å tilsvare dekket. Begge modellene ble testet både i ... -
A numerical and experimental study of a two-dimensional body with moonpool in waves and current
(Doctoral thesis at NTNU;2015:98, Doctoral thesis, 2015)The present work has relevane for the behaviour of a vessel equipped with a moonpool in ocaean waves. A moonpool is an opening in the middle of the vessel used for various marine operations. Resonant wave oscillations in ...