Blar i Institutt for marin teknikk på tittel

Viser treff 2818-2837 av 3421

    • Sensitivity Analysis of large Rotor Diameter on Offshore Wind Turbines with Suction Foundation 

      Thomassen, Øystein Sunde (Master thesis, 2014)
      This thesis has an objective aimed at understanding the sensitivity of the support structure for an offshore wind turbine with bucket foundation as the turbines get larger. The focus has been on the response and forces on ...

    • Sensitivity Analysis of Limited Actuation for Real-time Hybrid Model Testing of 5MW Bottom-fixed Offshore Wind Turbine 

      Karimirad, Madjid; Bachynski, Erin Elizabeth (Journal article; Peer reviewed, 2017)
      The present paper studies the effect of limited actuation for real-time hybrid model testing (ReaTHM® testing) of a bottom-fixed offshore wind turbine in operational, parked, and fault conditions. ReaTHM® testing is a new ...

    • A Sensitivity Study of Vessel Hydrodynamic Model Parameters 

      Han, Xu; Sævik, Svein; Leira, Bernt Johan (Chapter, 2020)
      In the recent decade, maritime and energy industries have realized the potential of using operational data in combination with a virtual replication of the real physical asset, termed the digital twin. The digital twin ...

    • Sensor-based Hybrid Observer for Dynamic Positioning 

      Brodtkorb, Astrid H.; Teel, Andrew R.; Sørensen, Asgeir Johan (Chapter, 2015)
      Observers are important components of dynamic positioning (DP) systems for marine vessels, estimating unmeasured states, filtering noise, filtering out wave induced motions, and predicting states in the case of signal loss. ...

    • Sensor-Carrying Platforms 

      Sørensen, Asgeir Johan; Ludvigsen, Martin; Norgren, Petter; Ødegård, Øyvind; Cottier, Finlo Robert (Chapter, 2020)
      Information and communication technology, autonomy, and miniaturization in terms of, for example, microelectromechanical systems are enabling technologies with significant impact on the development of sensors, sensor-carrying ...

    • Serviceability limit state assessment of semi-submersible floating wind turbines 

      Wang, Shuaishuai; Moan, Torgeir (Peer reviewed; Journal article, 2023)
      The design of a floating wind turbine (FWT) should satisfy the serviceability limit state (SLS) requirement for an efficient and safe operation throughout the entire work life. The SLS requirements are introduced by the ...

    • Severe Wave-Body Interactions: a Potential-Flow HPC Method and its Strong Domain-Decomposition Coupling with a Level-Set Navier-Stokes Solver 

      Hanssen, Finn-Christian Wickmann; Colicchio, Giuseppina; Greco, Marilena (Chapter, 2019)
      The main objective of our ongoing research is to investigate wave loads on and motions of floating bodies in steep waves. For modelling non-linear water-wave and wave-body interaction problems, researchers can use two main ...

    • Shallow-Water Habitat Mapping using Underwater Hyperspectral Imaging from an Unmanned Surface Vehicle: A Pilot Study 

      Mogstad, Aksel Alstad; Johnsen, Geir; Ludvigsen, Martin (Journal article; Peer reviewed, 2019)
      The impacts of human activity on coastal ecosystems are becoming increasingly evident across the world. Consequently, there is a growing need to map, monitor, and manage these regions in a sustainable manner. In this pilot ...

    • Shear lag effects on global bending moments in a long-span pontoon bridge under self-weight, traffic and environmental loads 

      Luan, Chenyu; Moan, Torgeir; Kvåle, Knut Andreas Kirkestuen; Cheng, Zhengshun (Peer reviewed; Journal article, 2023)
      The present paper deals with a systematic study of the shear lag effect on the bending moment distribution in girders of representative pontoon-type floating bridges (PTFBs). Comparative and parametric studies for ...

    • Sheltering Analysis of Gravity Based Structures in Shallow Water 

      Wallentinsen, Asbjørn Sve (Master thesis, 2018)
      This thesis has addressed the hydrodynamic problem of sheltering effects from gravity based structures by both numerical and experimental methods. GeniE is used for creating panel models of the structures studied. Wadam ...

    • Ship collision against a 10 MW semi-submersible floating offshore wind turbine 

      Yu, Zhaolong; Amdahl, Jørgen (Chapter, 2021)
      The number of installed offshore wind turbines is continuously expanding worldwide in recent years. Floating offshore wind farms are generally located near the coast close to traffic lanes and are exposed to the risk of ...

    • Ship collision analysis of monopile offshore wind turbines 

      Bruun, Vilde Eirin Eidsæther (Master thesis, 2021)
      Med økene etterspørsel for energi og nye bærekraftsmål er offshore vindturbiner en gyllen mulighet til å utnytte det fulle potensialet til vindenergi, og å redusere etterspørselen på en bærekraftig måte. Derimot utgjør den ...

    • Ship collision analysis with a floating offshore fish farm 

      Yu, Zhaolong; Amdahl, Jørgen; Kristiansen, David (Chapter, 2019)
      Due to limited nearshore areas and great impact to local ecosystems, the aquaculture industry is moving the fish farms from nearshore to more exposed sea regions where waves and current are stronger. Like other offshore ...

    • Ship Collision and Earthquake Analysis of Monopile Offshore Wind Turbines 

      Fjellvikås Solvik, Kristoffer (Master thesis, 2020)
      Offshore vindindustri har opplevd en hurtig utvikling de siste årene. På bare to tiår har turbinene vokst fra å være relativt små til å bli enorme strukturer på flere hundre meter som genererer strøm til tusenvis av ...

    • Ship collisions with floating offshore wind turbines 

      Kvernmo, Andreas Bohinen (Master thesis, 2023)
      Offshore vind er en fornybar energikilde som får mye fokus. Blant fordelene med offshore vind-energi er for eksempel bedre vind-forhold og større muligheter til å øke turbinstørrelsen sammenlignet med landbaserte turbiner. ...

    • Ship design for real sea states under uncertainty 

      Esmailian, Ehsan; Steen, Sverre; Koushan, Kourosh (Peer reviewed; Journal article, 2022)
      A ship is designed under inescapable uncertainty. Neglecting important uncertainties might lead to suboptimal designs. Furthermore, to achieve the best possible performance, the ship design should be optimized for the ...

    • Ship Design under Uncertainty 

      Rehn, Carl Fredrik (Doctoral theses at NTNU;2018:215, Doctoral thesis, 2018)
      The purpose of this thesis is to develop knowledge to design better ships. More specifically, it concerns the development and application of effective methods and models for handling future contextual uncertainty in the ...

    • Ship emissions calculation from AIS 

      Rakke, Stian Glomvik (Master thesis, 2016)
      A methodology, named ECAIS, is presented to calculate ship emissions based on their fuel consumption from AIS data. This is done to avoid use of commercial ship databases, which can be expensive for research on sizable ...

    • Ship Grounding: Analysis of Ductile Fracture, Bottom Damage and Hull Girder Response 

      Alsos, Hagbart Skage (Doktoravhandlinger ved NTNU, 1503-8181; 2008:250, Doctoral thesis, 2008)
      The present work is concerned with problems related to grounding of ships. This ranges from prediction of fracture to analysis of hull girder loads during grounding. The thesis is composed as a collection of articles and ...

    • Ship hulls exposed to ice-induced loads and resistance 

      Johansen, Stian Rørvik (Master thesis, 2018)
      Marine activities in the Arctic have always been difficult. In recent year there have been a significant increase in activities in this region. This is a combined result of both global warming and a strong development in ...