Blar i Institutt for marin teknikk på tittel
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Peak-shaving Control of Loads on Diesel-Generators in Hybrid Electric Ships
(Master thesis, 2016)Electric propulsion is quite common on dynamic positioned (DP) vessels, due to benefits with regards to operational availability, safety, cost effectiveness and flexibility. Thrusters, auxiliary equipment and other electric ... -
Penalty coupling of non-matching isogeometric Kirchhoff-Love shell patches with application to composite wind turbine blades
(Journal article; Peer reviewed, 2018)Isogeometric analysis (IGA) has been a particularly impactful development in the realm of Kirchhoff–Love thin-shell analysis because the high-order basis functions employed naturally satisfy the requirement of C 1 continuity. ... -
Performance Analysis of Ball Mill Liner Based on DEM-FEM Coupling
(Peer reviewed; Journal article, 2020)In the paper, based on the finite element-discrete element method coupling and the coupled bionics theory, four lifting bar models with coupled bionic surface structures, such as smooth, transverse stripe, longitudinal ... -
Performance analysis of dynamic positioning observer algorithms: Application to the cybership models in MC-Lab
(Master thesis, 2023)Det Marin Kybernetikk Laboratorium (MC-Lab) har en voksende flåte av kyberskip som brukes til masteroppgaver og doktorgradsforskning. Denne masteroppgaven sammenligner Dynamisk Posisjonering Observer (DPO) algoritmer som ... -
Performance analysis of Flettner rotor installations
(Master thesis, 2022)I 2018 annonserte den internasjonale sjøfartsorganisasjonen sitt mål om å redusere utslippene av drivhusgasser med 50\% fra 2008 til 2050. Siden dette har det vært et økende fokus på å implementere utslippsreduserende ... -
Performance assessment of the energy system onboard an LNG FPSO
(Master thesis, 2011)LNG power and heat systems, the balance of demand is dependent of the feed gas and on the location of the production vessel. Further, the power and heat balance is dependent on the gas processing efficiencies and the air ... -
Performance Indicators for Subsea Lifting Operations - Report of 1st Marine Operations Forum
(Research report, 2017) -
Performance Monitoring in Teekay Petrojarl: Criteria, Metrics, Utilisation of Data and Improvement Processes
(Master thesis, 2014)The petroleum industry is capital intensive and oil companies are dependent on stable and reliable production. Costs in early project phases must be balanced by revenue in production phases. Improving performance to ensure ... -
Performance monitoring of compressors with electrical drive
(Master thesis, 2010)Compressors are widely used in the oil and gas industry, and have been so for many years. Previously, gas turbines where the standard driver for big offshore compressors, but as an ever increasing amount of attention is ... -
Performance monitoring on a gas admission valve in a dual fuel engine - Implementation of condition based maintenance by applying machine learning and statistical models
(Master thesis, 2018)An analysis of the performance data from a dual fuel engine is performed, in order to build several prognostic models to predict when a failure occurs on the gas admission valve. The model who performs and provides the ... -
Performance of large diameter steel tubes from a floating offshore wind turbine under lateral impact loads
(Chapter, 2023)Floating offshore wind turbines (FOWTs) are expected to be increasingly installed in the world to harvest wind power in deep waters. Offshore wind turbines are often located near the coasts close to the traffic lanes and ... -
Performance Quantification of Icebreaker Operations in Ice Management by Numerical Simulations
(Peer reviewed; Journal article, 2021)The paper addresses the problem of quantifying and assessing the effectiveness of icebreaker operations in ice management (IM) using a high-fidelity simulator. The numerical model includes an accurate geometric representation ... -
Phase-field description of brittle fracture in plates and shells
(Journal article; Peer reviewed, 2016)We present an approach for phase-field modeling of fracture in thin structures like plates and shells, where the kinematics is defined by midsurface variables. Accordingly, the phase field is defined as a two-dimensional ... -
Phase-field simulation of ductile fracture in shell structures
(Peer reviewed; Journal article, 2021)In this paper, a computational framework for simulating ductile fracture in multipatch shell structures is presented. A ductile fracture phase-field model at finite strains is combined with an isogeometric Kirchhoff-Love ... -
A phase-time-path-difference approach for online wave direction and wave number estimation from measured ship motions in zero and forward speed using a single inertial measurement unit
(Journal article; Peer reviewed, 2023)This study investigates the potential capability of a relatively new and unexplored signal-based approach for shipboard wave estimation. The approach uses the phase-time-path-differences (PTPDs) from an array of shipboard ... -
Physical and mathematical modeling of awave energy converter equipped with a negative spring mechanism for phase control
(Journal article; Peer reviewed, 2018)A wave-energy converter has been studied through the combination of laboratory experiments and numerical simulations. The converter model is a semi-submerged axi-symmetric buoy with a circular cross section with a diameter ... -
Physical controls on phytoplankton size structure, photophysiology and suspended particles in a Norwegian biological hotspot
(Peer reviewed; Journal article, 2019)The impact of the physical environment and phytoplankton size on particle types (zooplankton, biogenic matter or phytodetritus) in the water column is poorly understood. Here, we investigate how hydrography (e.g. water ... -
Physical investigation of slamming loads on a 2D body
(Master thesis, 2015)In this thesis a physical investigation of the slamming loads on a two-dimensional body is performed. It includes an experimental analysis of a drop test performed at MARINTEK's laboratories on a wedge shaped section in ... -
A Physical-Based Damping Model of Gap and Moonpool Resonance in WAMIT
(Chapter, 2022) -
A physics-, SCADA-based remaining useful life calculation approach for wind turbine drivetrains
(Peer reviewed; Journal article, 2022)This paper describes the development of a physics-, SCADA-based model able to predict the expected lifetime for wind turbine drivetrains. A real-time coupled torsional gearbox-generator model is developed using the bond ...