Blar i Institutt for marin teknikk på tittel
Viser treff 1361-1380 av 3410
-
Fatigue reliability assessment of offshore wind turbines with stochastic availability
(Journal article; Peer reviewed, 2019)In this paper, the impact on lifetime estimation of an offshore wind turbine by introducing a stochastic model for the availability is investigated. Offshore bottom-fixed wind turbines typically have an average downtime ... -
Fatigue reliability of mooring chains, including mean load and corrosion effects
(Peer reviewed; Journal article, 2022)A reliability formulation for mooring chain fatigue is developed, including the effects of mean load and degradation due to corrosion. They are included by starting from a S-N model with parameterized dependence to the ... -
Fatigue reliability of offshore Mooring chains under influence of mean load and corrosion
(Doctoral theses at NTNU;2023:196, Doctoral thesis, 2023)A number of full-scale fatigue tests have been conducted for offshore mooring chain in the last decade for both new and used chains, retrieved after operation in the North Sea. The surface condition of the used chains vary ... -
Fatigue Reliability-Based Inspection and Maintenance Planning of Gearbox Components in Wind Turbine Drivetrains
(Journal article; Peer reviewed, 2014)This paper introduces a reliability-based maintenance plan for wind turbine gearbox components. The gears and bearings are graded based on their fatigue damage and a maintenance map is developed to focus on those components ... -
Fatigue sensitivity to foundation modelling in different operational states for the DTU 10MW monopile-based offshore wind turbine
(Journal article; Peer reviewed, 2019)The importance of foundation modelling for the support-structure fatigue damage estimation of a 10 MW monopile based offshore wind turbine is investigated in different operational states and wind-wave misalignment conditions. ... -
Fatigue sensitivity to foundation modelling in different operational states for the DTU 10MW monopile-based offshore wind turbine
(Journal article; Peer reviewed, 2019)The importance of foundation modelling for the support-structure fatigue damage estimation of a 10 MW monopile based offshore wind turbine is investigated in different operational states and wind-wave misalignment conditions. ... -
Fatigue Study of Copper Conductors
(Master thesis, 2014)This master thesis was carried out during the spring semester of 2014 at Department of Marine Technology in Norwegian University of Science and Technology. It was a continuous work of the master project during autumn ... -
Fault detection and diagnosis of a blade pitch system in a floating wind turbine based on Kalman filters and artificial neural networks
(Peer reviewed; Journal article, 2021)This paper describes the development of a fault detection and diagnosis method to automatically identify different fault conditions of a hydraulic blade pitch system in a spar-type floating wind turbine. For fault detection, ... -
Fault Detection and Diagnosis of Induction Motor for Ship Propulsion by utilizing Electrical Signature and Finite Element Method
(Master thesis, 2021)Induksjonsmotoren studert i denne masteroppgaven er en av to fremdriftsmotorer installert ombord polarforsynings- og forskningsfartøyet SA Agulhaus II og arbeidet er et bidrag til HealthProp-prosjektet (HealthProp 2020). ... -
Fault Detection for Position Mooring Using Statistical Analysis
(Master thesis, 2018)The standard approach for detecting mooring line failures for position moored vessels is by measuring the tension in the mooring lines, either directly or indirectly. The sensors measuring the line tensions are often hard ... -
Fault Detection of Drive Trains in 10 MW Offshore Wind Turbines using Non-Traditional Methods
(Master thesis, 2020)One of the world’s biggest concerns is global warming, a solution to this can be wind energy. Offshore wind energy has advantages over onshore wind energy, however, the levelized cost of energy is higher. The maintenance ... -
Fault Detection of Offshore Wind Turbine Drivetrain, State-of-the-Art, Development Trend and Role of Digital Twin
(Master thesis, 2019)Denne masteroppgaven gjennomgår noen av utfordringene vindmøller møter på og hvordan en modellbasert tilstandsovervåking og bruk av en digital tvilling vil være gunstig for lønnsomheten. Avhandlingen viser utviklingen av ... -
Fault Detection of Offshore Wind Turbine Drivetrain. State-of-the-Art, Development Trend and Role of Digital Twin
(Master thesis, 2019)Denne masteroppgaven gjennomgår noen av utfordringene vindmøller møter på og hvordan en modellbasert tilstandsovervåking og bruk av en digital tvilling vil være gunstig for lønnsomheten. Avhandlingen viser utviklingen av ... -
Fault detection of offshore wind turbine drivetrains in different environmental conditions through optimal selection of vibration measurements
(Peer reviewed; Journal article, 2023)In this study, a vibration-based fault detection method is proposed for offshore wind turbine drivetrain based on the optimal selection of the acceleration measurements. The main aim is to find the sensor positions mounted ... -
Fault Diagnosis of Floating Wind Turbine Drivetrain- Methodologies and Applications
(Doctoral theses at NTNU;2018:286, Doctoral thesis, 2018)Increasing demand for renewable energy is driving innovation and attracting many research resources all over the world. Wind energy is one of the most promising sources of renewable energy. Wind turbine has been in use for ... -
Fault Monitoring and Fault Recovery Control for Position-Moored Vessels
(Journal article; Peer reviewed, 2011)This paper addresses fault-tolerant control for position mooring of a shuttle or floating production storage and offloading vessels. A complete framework for fault diagnosis is presented. A loss of a sub-sea mooring line ... -
Fault Tolerant Control of Thruster-Assisted Position Mooring System
(Master thesis, 2015)This thesis fo cu ses on the fau lt-to lerant control al gor ithm o f the thr u ster-assiste d posi tio n moor ing system ( TAPM). TAPM is an energy-efficient and reliable stationkeeping method for deep water structures. ... -
Fault tolerant position mooring control based on structural reliability
(Doktoravhandlinger ved NTNU, 1503-8181; 2012:156, Doctoral thesis, 2012)Safety of position mooring system is a prime concern in the marine industry and regulations are in force to prevent faults in equipment from causing failure of the whole system. There are many reasons for failures in ... -
Fault-tolerant Observer Design
(Master thesis, 2017)This master thesis dealt with the development of a fault-tolerant model-based observer for a low-cost ROV developed by BluEye Robotitcs, P2-Alpha. The observer was developed for 4 degrees of freedom (DOFs) using the installed ... -
Fault-tolerant Position-Mooring Control for Offshore Vessels
(Journal article; Peer reviewed, 2018)Fault-tolerance is crucial to maintain safety in offshore operations. The objective of this paper is to show how systematic analysis and design of fault-tolerance is conducted for a complex automation system, exemplified ...