Blar i Institutt for marin teknikk på tittel
Viser treff 2613-2632 av 3410
-
Real-Time Hybrid Model Testing of Floating Wind Turbines
(Doctoral theses at NTNU;2016:369, Doctoral thesis, 2016)Offshore wind power is an active research topic motivated by today’s world energy crisis. While bottom-fixed turbines are relatively mature and commercially viable (though dependent on state-based subsidies to green energy), ... -
Real-time hybrid model testing of floating wind turbines: sensitivity to limited actuation
(Journal article; Peer reviewed, 2015)Real-time hybrid model testing (ReaTHM) is a new approach for conducting small-scale experimental campaign [1], [2] and [3]. In the case of a floating wind turbine in a wave basin, the aerodynamic loads on the wind turbine ... -
Real-Time Hybrid Model Testing of Moored Floating Structures Using Nonlinear Finite Element Simulations
(Chapter, 2017)The paper proposes an application of real-time hybrid model testing (abbreviated ReaTHM testing) for the study of moored offshore structures. The structure under study is a moored axisymmetric floater with various bilge ... -
Real-Time Marine Vessel and Power Plant Simulation
(Chapter; Peer reviewed, 2015)In this paper, we present a system simulator of a marine vessel and power plant which contains the mechanical system with diesel engines, propellers, steering gear, and thrusters; the electrical system with generators, ... -
Real-Time Parameter Estimation of a Nonlinear Vessel Steering Model Using a Support Vector Machine
(Journal article; Peer reviewed, 2019)The least-square support vector machine (LS-SVM) is used to estimate the dynamic parameters of a nonlinear marine vessel steering model in real-time. First, maneuvering tests are carried out based on a scaled free-running ... -
Real-Time Parameter Estimation of Nonlinear Vessel Steering Model Using Support Vector Machine
(Chapter, 2018)The Least-square support vector machine (LS-SVM) is used to estimate the dynamic parameters of a nonlinear marine vessel steering model in real-time. First, manoeuvring tests are carried out based on a scaled free-running ... -
Real-Time Simulation of Ship Waves
(Master thesis, 2022)Denne oppgåva har som mål å utvikle ei rutine for realistisk og effektiv visuell modellering av skipsbølgjer i sanntid. Formålet er å forbetre dei virtuelle miljøa der algoritmar som skal brukast i autonome fartøy enklare, ... -
Recent Advances in Integrated Response Analsysis of Floating Wind Turbines in a Reliability Perspective
(Peer reviewed; Journal article, 2020)Offshore wind provides an important source of renewable energy. While wind turbines fixed to the seabed in shallow water have already been industrialized, floating wind turbines are still at an early stage of development. ... -
Recent Developments and New Results on The Flow Around an Inclined 6:1 Prolate Spheroid
(Chapter, 2017)In the light of new computational resources and improved simulation tools we present new simulations of the flow around an inclined 6:1 prolate spheroid. We present the development of the flow from the symmetric and laminar ... -
Recognition of Cold-Water Corals in Synthetic Aperture Sonar Imagery
(Chapter, 2018)The deep-water coral Lophelia pertusa is a common reef-building scleractinian coral, or stony coral, occurring in mid to deep waters around the world. The reefs they form are regarded as hot spots for biodiversity and ... -
Redefining the service vessel fleet size and mix problem using tradespace methods
(Chapter, 2017)Purpose This paper addresses the problem of designing a fleet of service vessels to cooperate towards performing a set of operations under operation demand uncertainty. Emphasis is put on identification of compromises ... -
Reducing GHG emissions in Shipping - measures and options
(Chapter, 2018)CO2 emissions from maritime transport represent around 3% of total anthropogenic CO2 emissions. These emissions are assumed to increase by 50% to 250% up to 2050 in business-as-usual scenarios with a tripling of world ... -
Reducing GHG emissions in Shipping - measures and options
(Chapter, 2018)CO2 emissions from maritime transport represent around 3% of total anthropogenic CO2 emissions. These emissions are assumed to increase by 50% to 250% up to 2050 in business-as-usual scenarios with a tripling of world ... -
Reducing power transients in diesel-electric dynamically positioned ships using re-positioning
(Journal article, 2014)A thrust allocation method with a functionality to assist power management systems by using the hull of the ship as a store of potential energy in the field of environmental forces has been recently proposed and demonstrated ... -
Reducing the number of individuals to monitor shoaling fish systems - Application of the Shannon entropy to construct a biological warning system model
(Journal article; Peer reviewed, 2018)The present study aims at identifying the lowest number of fish (European seabass) that could be used for monitoring and/or experimental purposes in small-scale fish facilities by quantifying the effect that the number of ... -
Reducing the probability of ship grounding: Which measure to undertake?
(Journal article; Peer reviewed, 2014)The analytic hierarchy process has been used to elicit the knowledge of maritime transport stakeholders, such as seafarers, authorities, insurers and academics, regarding human factors and risk-reducing measures for ship ... -
Reducing uncertainty of Monte Carlo estimated fatigue damage in offshore wind turbines using FORM
(Chapter, 2016)Uncertainties related to fatigue damage estimation of non-linear systems are highly dependent on the tail behaviour and extreme values of the stress range distribution. By using a combination of the First Order Reliability ... -
Reduction of maritime GHG emissions and the potential role of E-fuels
(Peer reviewed; Journal article, 2021)Maritime transport accounts for around 3% of global anthropogenic Greenhouse gas (GHG) emissions (Well-to-Wake) and these emissions must be reduced with at least 50% in absolute values by 2050, to contribute to the ambitions ... -
Reduction of trawl impact loads on pipelines resting exposed on the seabed
(Master thesis, 2019)I dag finnes havbunnsinstallasjoner rundt omkring i Nordsjøen og Barentshavet med rørledninger som strekker seg totalt over 8800 kilometer på norsk sokkel. Rørledninger eksisterer rundt offshore-anlegget og er koblet til ... -
REGENERATION IN CRANE OPERATIONS
(Master thesis, 2017)In this thesis a marine power plant with a battery pack has been modeled using bond graph theory, using the bond graph simulation software 20-sim. The popularity of hybrid power systems are increasing in the marine sector, ...