Browsing Institutt for marin teknikk by Subject "VDP::Technology: 500::Marine technology: 580"
Now showing items 1-20 of 116
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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 ... -
A Theoretical and Experimental Study of Wave-induced Hydroelastic Response of a Circular Floating Collar
(Doctoral theses at NTNU;2017:75, Doctoral thesis, 2017)Wave-induced hydroelastic response of a circular plastic collar used as a floater of a net cage in aquaculture is studied by means of theory, model tests and numerical simulations. A low-frequency linear slender-body ... -
A Two-dimensional Numerical and Experimental Study of a Floater with Net and Sinker Tube in Waves and Current
(Doctoral theses at NTNU;2017:111, Doctoral thesis, 2017)In this thesis, nonlinear wave and current forces on a coupled system of a moored floater with net panel and sinker tube is studied. Due to the complexity of the hydrodynamic analysis of a complete three-dimensional fish ... -
A Unified Framework for Fault Detection and Diagnosis Using Particle Filter
(Journal article; Peer reviewed, 2014)In this paper, a particle filter (PF) based fault detection and diagnosis framework is proposed. A system with possible faults is modeled as a group of hidden Markov models representing the system in fault-free mode and ... -
Acoustic-Based Probabilistic Localization and Mapping for Unmanned Underwater Vehicles in Aquaculture Operations
(Doctoral theses at NTNU;2020:208, Doctoral thesis, 2020)The aquaculture industry needs automation to meet the world's increasing demand for fish protein. However, it is considered to be one of the most dangerous occupations in Norway due to the required amount of manual labor ... -
Adaptive Sampling for Marine Robotics
(Doctoral theses at NTNU;2019:196, Doctoral thesis, 2019)Maintaining a healthy ocean is of the utmost importance. Having only a limited set of resources available to study this vast domain requires research and science to focus on more efficient data collection. Determining when ... -
Advanced Control Algorithms to Support Automated Offshore Wind Turbine Installation
(Doctoral theses at NTNU;2019:231, Doctoral thesis, 2019)The thesis presents the research on automated offshore wind turbine (OWT)installation. The aim of the project is to find innovative and cost-effective methods for installing and maintaining OWTs. Utilization of wind ... -
Aerodynamic Modelling of Floating Wind Turbines
(Doctoral thesis at NTNU;2015:150, Doctoral thesis, 2015)Engineering methods that are commonly used to estimate aerodynamic loads on the rotors of floating wind turbines were originally developed for the analysis of land based, or bottom fixed, wind turbines. In an offshore ... -
Aided Inertial Navigation of Underwater Vehicles
(Doctoral theses at NTNU;2018:96, Doctoral thesis, 2018)This thesis is motivated by cost reduction in subsea inspection, maintenance, and repair operations, which requires autonomy and automatic functionality in order to save time and money. Autonomy and automatic functions ... -
Assessment of Marine Operations for Offshore Wind Turbine Installation with Emphasis on Response-Based Operational Limits
(Doctoral theses at NTNU;2016:336, Doctoral thesis, 2016)This thesis addresses methodologies for assessment of response-based operational limits in terms of allowable vessel responses or sea state parameters, and numerical analyses of current and novel o_shore wind turbine ... -
Autonomous Technology for IMR Operations in the Norwegian Aquaculture
(Doctoral theses at NTNU;2020:9, Doctoral thesis, 2020) -
Autonomous underwater vehicles in Arctic marine operations: Arctic marine research and ice monitoring
(Doctoral theses at NTNU;2018:255, Doctoral thesis, 2018)This thesis considers autonomous underwater vehicles (AUVs) in Arctic marine operations. It focuses on their use as a sensor platform in ice monitoring operations and the use of AUVs for Arctic marine research. Arctic AUV ... -
Cavity flows and wake behind an elliptic cylinder translating above the wall
(Doctoral theses at NTNU, 2020:312, Doctoral thesis, 2020)Vortex formation is one of the fundamental modes in fluid mechanics and it can develop in almost every realization of fluid motion. Studying its fundamental dynamics and interactions is of great interest for engineering ... -
Conceptual design of low-emission ships
(Doctoral theses at NTNU;2023:186, Doctoral thesis, 2023)Human-induced climate change is one of the significant challenges of our time. In order to help limiting global warming, the International Maritime Organization has set out stepwise greenhouse gas emission reduction ambitions ... -
Data mining methods for the analysis of power systems of vessels
(Doctoral theses at NTNU;2018:412, Doctoral thesis, 2018)Measurements from on-board monitoring systems of vessels are now increasingly available for data analysis, and their relevance is growing as the ship industry enters the digitilization phase. The analysis of data from ... -
Decision-making for Dynamic Positioning Operations in the Offshore Industry – A Human Factors based Approach
(Doctoral theses at NTNU;2020:311, Doctoral thesis, 2020) -
Design and analysis for a steel braceless semi-submersible hull for supporting a 5-MW horizontal axis wind turbine
(Doctoral theses at NTNU, 2018:194, Doctoral thesis, 2018)This thesis deals with design and analysis of steel semisubmersible hulls for supporting MW-level horizontal axis wind turbines. The thesis address the following four topics: 1) conceptual design methods, 2) conceptual ... -
Design and analysis of combined floating wave and wind power facilities : with emphasis on extreme load effects of the mooring system
(Doctoral thesis at NTNU;, Doctoral thesis, 2014)A rapid increase in energy demand and the global warming problem has increased the focus on renewable energy resources. Among renewable sources, ocean wave and offshore wind are the topic of this thesis because both ... -
Design of Hybrid Fuel Cell/Battery Systems for Maritime Vessels
(Doctoral theses at NTNU;2022:281, Doctoral thesis, 2022)The work described in this thesis encompasses multiple aspects related to the development of hybrid marine power systems utilizing proton exchange membrane fuel cells and batteries. The focus is placed on the definition ... -
Development of Bivariate Extreme Value Distributions for Applications in Marine Technology
(Doctoral thesis at NTNU;2015:169, Doctoral thesis, 2015)The extreme value theory for applications in such a responsible branch of industry as offshore and maritime engineering requires a robust, straightforward and reliable method for estimating the statistics of extremes. A ...