Blar i Institutt for marin teknikk på tittel

Viser treff 3198-3217 av 3421

    • Towards gradient-based design optimization of fully-flexible tension-leg platform wind turbines 

      Rohrer, Peter Joshua; Bachynski-Polic, Erin Elizabeth; Collette, Matthew (Peer reviewed; Journal article, 2022)
      Novel technologies and design methods are needed to enable cost-competitive development of wind turbines with floating foundations. Tension-leg platforms have an established history in the oil and gas industry, though the ...

    • Towards Remaining Life Assessment by use of Conditional Adversarial Networks 

      Pettersen, Håkon Kvalvåg (Master thesis, 2021)
      Statistikk viser at fler-tallige tap av forankringsliner har skjedd tidlig i den designede levetiden. Forankringsliner av kjetting var ansvarlige for opptil 50 % av alle tap, hvor utmatting var en av hoved°arsakene for ...

    • Towards Remaining Life Assessment Using Machine Learning 

      Heien, Henrik (Master thesis, 2021)
      Brudd i ankerkjettinger grunnet korrosjon og utmatting er et problem offshorenæringen møter. Brudd i flere kjettinger i permanent oppankrede systemer har vist seg å ha en årlig frekvens på omtrent 3 x 10^-3 og de fleste ...

    • Towards Robust Autonomy of Underwater Vehicles in Arctic Operations 

      Bremnes, Jens Einar (Master thesis, 2019)
      Denne masteroppgaven undersøker verktøy og metoder for å utvikle mer robuste autonomiløsninger for autonome undervannsfarkoster (AUV) i arktiske underisoperasjoner. AUVer er effektive plattformer for tverrfaglig vitenskapelig ...

    • Towards Safer, Smarter and Greener Ships Using Hybrid Marine Power Plants 

      Sørensen, Asgeir Johan; Skjetne, Roger; Bø, Torstein Ingebrigtsen; Miyazaki, Michel Rejani; Johansen, Tor Arne; Utne, Ingrid Bouwer; Pedersen, Eilif (Journal article; Peer reviewed, 2017)
      This chapter gives an overview of research activities carried out at NTNU AMOS in relation to hybrid marine power plants enabling safer, smarter and greener ships. Recently electrical power plants with a set of diesel-generator ...

    • Towards Safety Barrier Analysis of Hydrogen Powered Maritime Vessels 

      Balestra, Lorenzo; Yang, Ruochen; Schjølberg, Ingrid; Utne, Ingrid Bouwer; Ulleberg, Øystein (Chapter, 2021)
      This paper focuses on the use of safety barrier analysis, during the design phase of a vessel powered by cryogenic hydrogen, to identify possible weaknesses in the architecture. Barrier analysis can be used to evaluate a ...

    • Towards supervisory risk control of autonomous ships 

      Utne, Ingrid Bouwer; Rokseth, Børge; Sørensen, Asgeir Johan; Vinnem, Jan Erik (Peer reviewed; Journal article, 2020)
      The objective of this paper is to outline a framework for online risk modelling for autonomous ships. There is a clear trend towards increased autonomy and intelligence in ships because it enables new functionality, as ...

    • Tower Design for a 10MW Floating Offshore Wind Turbine with Reduced Stiffness 

      Fiskvik, Stian (Master thesis, 2020)
      Abstract will be available on 2023-07-01

    • Tower design for very large floating wind turbines 

      Fredheim, Rikke Olsen (Master thesis, 2022)
      Flytende havvind kan utnytte vindpotensial på dypere vann og være en verdifull kilde til fornybar og ren energi. For at disse vindturbinene skal bli kostnadseffektive, er det nødvendig å oppskalere. Ved oppskalering kan ...

    • Trajectory Planning for Navigation Aiding of Autonomous Underwater Vehicles 

      Sture, Øystein; Norgren, Petter; Ludvigsen, Martin (Peer reviewed; Journal article, 2020)
      Autonomous underwater vehicles can perform seabed surveys with a higher resolution and quality than from equivalent ship-mounted sensors. Although high-grade inertial navigation systems aided by Doppler velocity logs can ...

    • Trajectory Tracking Motion Control System for Observation Class ROVs 

      Fernandes, Daniel de Almeida; Sørensen, Asgeir Johan; Donha, Decio C. (Journal article, 2013)
      This paper proposes a MCS (Motion Control System) with trajectory tracking capability for observation class ROVs (Remotely Operated Vehicle) used to carry out automated high-resolution image capturing missions, e.g. ...

    • Transfer Learning in Underwater Operations 

      Skaldebø, Martin Breivik; Sans-Muntadas, Albert; Schjølberg, Ingrid (Journal article, 2019)
      This paper investigates a method for reducing the reality gap that occurs when applying simulated data in training for vision-based operations in a subsea environment. The distinction in knowledge in the simulated and real ...

    • Transient Dynamic Response of Ship Hull 

      Liu, Meitong (Master thesis, 2015)
      Slamming often occurs in severe sea states particular for high speed vessels, which can cause damage to ship hulls or even equipment on ships. Analysis of transient dynamic response of ship hulls is useful in establishing ...

    • Transient dynamics of drilling riser during disconnect 

      Bratseth, Svein (Master thesis, 2011)
      Drilling of petroleum wells have traditionally be done by adjusting the mud weight to balance pressure of the well. A new method of controlling well pressure is called controlled mud cap drilling. The method uses high mud ...

    • Transient Performance and Emissions of a Turbocharged Diesel Engine for Marine Power Plants: Numerical Simulation and Experimental Investigation 

      Yum, Kevin Koosup (Doctoral theses at NTNU;2017:237, Doctoral thesis, 2017)
      New marine power and propulsion plants have to meet increasingly stringent environmental regulations and requirements for flexible and efficient operations. Such a multi-objective task requires a systems approach in which ...

    • Transient Performance in Dynamic Positioning of Ships: Investigation of Residual Load Models and Control Methods for Effective Compensation 

      Værnø, Svenn Are Tutturen (Doctoral theses at NTNU;2020:355, Doctoral thesis, 2020)
      This thesis concerns how the dynamic positioning (DP) control system can better handle transient events, where the loads experienced by the vessel change significantly over a short time frame. The material is intended for ...

    • Transitional wake flow behind an inclined flat plate : computation and analysis 

      Yang, Dan (Doktoravhandlinger ved NTNU, 1503-8181; 2013:179, Doctoral thesis, 2013)
      The flow past an inclined flat plate is characterized by fixed separation points at both edge and an asymmetric wake pattern. The present doctoral thesis investigates the threedimensional characteristics in the wake of an ...

    • Transportation for deep sea mining using underwater vehicle: Conceptual design using a systematic approach 

      Solheim, Astrid Vamråk (Master thesis, 2019)
      Hensikten med denne oppgaven er å foreslå designløsning (er) på konseptuelt nivå for undervannstransport av malm fra havbunn til havn for gruvedrift. Essensen av dyphavs gruvedrift er å utvinne mineraler fra en marin ...

    • Transverse tensile armour buckling of flexible pipes 

      Zhou, chongyao (Master thesis, 2014)
      During the installation and operation process, the empty flexible pipe will experience a largeend fitting load which is the compression load at the ends of the pipe. At the same time, the dynamicload from wave and current ...

    • Transverse Viscous Loads in Maneuvering 

      Ramachandran Nair Rajasree, Vishnu (Master thesis, 2022)
      The main objective of the thesis is to improve the estimation of transverse viscous loads in ship maneuvering. The traditional approach for calculating the transverse viscous loads in most of the maneuvering models is based ...