Blar i Institutt for marin teknikk på forfatter "Nejad, Amir"
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Consequences of Load Mitigation Control Strategies for a Floating Wind Turbine
Lee, Chern Fong (Master thesis, 2019)Wind turbines with floating support structures are blessed with their potential in generating high quality and affordable electricity due to the economics of scale. However, conventional land-based wind turbines blade pitch ... -
Development and Application of Digital Twin in Marine Propulsion System
Tian, Yuan (Master thesis, 2019)Abstract Marine propulsion system provides power for the sailing and operations of a ship, and can be treated as the heart of a ship. It has long been the main focus of marine engineers and researchers. After decades of ... -
Development of a Digital Twin for Condition Monitoring, Focusing on Electrical Propulsion Systems for Marine Application
Bjørum, Lars Oftedal (Master thesis, 2019)Denne oppgaven omhandler bruk av digitale tvillinger for tilstandsovervåking, som har utviklet seg til å bli en integrert del av simulering, testing og drift av ulike produkter. Teknologien viser stort potensial for å ... -
Digital Twin Framework for Real-Time State Prediction, Remaining Useful Life Estimation and Control of Floating Offshore Wind Turbines
Selheim, Fredrik Flesland; Tharaldsen, Hans Petter (Master thesis, 2024)Vindenergi er forventet å være en viktig energikilde på en global skala i fremtiden, og flytende havvind gjør det mulig å utnytte vind i dype farvann. Imidlertid er værtilstandene i disse områdene tøffe, og kostnadene er ... -
Dynamic Analysis in Design and Operation of Large Floating Offshore Wind Turbine Drivetrains
Torsvik, Jone (Doctoral theses at NTNU;2020:403, Doctoral thesis, 2020)This thesis presents a versatile rotor-bearing simulation model, including elements required to model rolling-element bearings as main bearings in large floating offshore wind turbines. Furthermore, the thesis presents new ... -
Dynamic Modelling, Vibration and Fatigue Analysis of Slow Rotating Propulsion Systems
Rimstad, Helene (Master thesis, 2018)In recent years, shipping has experienced a technical transformation motivated by its impact on the environment and the desire to reduce operational costs. Engines with lower power ranges and slow steaming are two examples. ... -
Effects of Induction and Wake Steering Control on Drivetrain Fatigue and Wind Farm Power Production
van Binsbergen, Diederik (Master thesis, 2020)Effektoptimalisering gjennom vakestyring og aksial induksjonskontroll er et kjent tema innen vindkraft som generelt er bevist til å fungere. Kontrollmanøvreres innflytelse på utmatting av statiske komponenter er generelt ... -
Limiting mechanisms for the torque density of wind turbine drivetrains
Kooloos, Wichert (Master thesis, 2019)As wind turbines continue to increase in size, so do the loads acting on the drivetrain. To handle the higher loads the mass of the drivetrain needs to increase. A better understanding of this mass increase can result in ... -
On Developing a Digital Twin for Fault Detection in Drivetrains of Offshore Wind Turbines
Johansen, Sigrid Siksjø (Master thesis, 2018)This master thesis considers fault detection of drivetrains in offshore wind turbines through digital twin approach. A literature review regarding current operations concerning maintenance approaches in today s practices ... -
Prognosis and fault detection of drivetrains in medium-speed 10-MW Floating Wind Turbines
Yagüe, Adrián (Master thesis, 2020)Premature failures in large offshore Wind Turbines are often attributed to bearing failure despite gearboxes being designed and developed using the best bearing design practices. Furthermore, as turbine size and rated power ... -
Vibration-Based Condition Monitoring of Drivetrains in Large Offshore Wind Turbines in a Digital Twin Perspective
Moghadam, Farid Khazaeli (Doctoral theses at NTNU;2021:109, Doctoral thesis, 2021)According to EU 2050 plan, offshore wind farms based on large floating wind turbines are considered as a main source of power supply in the coming future. Among the turbine systems, drivetrain contributes significantly in ... -
Vibration-based Fault Detection and Condition Monitoring of Mechanical Systems in Wind Turbines
Rasmussen, Morten Aleksander (Master thesis, 2018)An increased energy demand of the future, combined with problems related to climate change and emissions of greenhouse gases, has made solutions for reliable and efficient renewable energy producers attractive. Wind turbines ... -
Wind turbine drivetrains condition monitoring through SCADA data on farm level
Muller, Jelle (Master thesis, 2019)The offshore wind industry has grown rapidly over the last decade and drivetrains are increasing in size to reduce the cost of energy. These turbines are operating in a harsh environment. Adopting a preventive maintenance ...