Browsing SINTEF Open by Author "Kristiansen, Trygve"

Now showing items 1-14 of 14

    • A 2D Experimental and Numerical Study of Moonpools With Recess 

      Ravinthrakumar, Senthuran; Kristiansen, Trygve; Ommani, Babak (ASME 2018 37th International Conference on Ocean, Offshore and Arctic Engineering;OMAE2018-78326, Chapter, 2018-06-25)
      Moonpool resonance is investigated in a two-dimensional setting in terms of regular, forced heave motions of a model with moonpool with different rectangular-shaped recess configurations. A recess is a reduced draft zone ...

    • Bilge keel induced roll damping of an FPSO with sponsons 

      Ommani, Babak; Fonseca, Nuno; Kristiansen, Trygve; Bakksjø, Hanne (ASME 2016 35th International Conference on Ocean, Offshore and Arctic Engineering - Volume 1: Offshore Technology;Offshore Geotechnics;OMAE2016-54420, Chapter, 2016-06)
      The bilge keel induced roll damping of an FPSO with sponsons is investigated numerically and experimentally. The influence of the bilge keel size, on the roll damping is studied. Free decay tests of a three-dimensional ...

    • Coupled vessel and moonpool responses in regular and irregular waves 

      Ravinthrakumar, Senthuran; Kristiansen, Trygve; Molin, Bernard Jean Marie; Ommani, Babak (Journal article; Peer reviewed, 2020-03)
      Hydrodynamic coupling between the ship and moonpool responses is investigated. Dedicated experiments are carried out in the Ocean Basin at Sintef Ocean. Three different moonpool sizes are studied, where the moonpool length ...

    • Experimental and numerical investigations of monopile ringing in irregular finite-depth water waves 

      Bachynski, Erin Elizabeth; Kristiansen, Trygve; Thys, Maxime (Journal article; Peer reviewed, 2017-08-16)
      In storm conditions, nonlinear wave loads on monopile offshore wind turbines can induce resonantringing-type responses. Efficient, validated methods which capture such events in irregular waves inintermediate or shallow ...

    • Experimental study on the effect of second order wavemaker theory on the response of a flexible large diameter monopile in irregular sea 

      Hoseini Dadmarzi, Fatemeh; Tonnel, Matthias; Thys, Maxime; Bachynski-Polic, Erin Elizabeth; Kristiansen, Trygve (Peer reviewed; Journal article, 2021)
      Motivated by the need for larger offshore wind turbines, large diameter monopile foundations are being developed. To ensure safe design, there is a need for model testing and validation of hydrodynamic load models. Scaled ...

    • Gap Resonance Analyzed by a Domain-Decomposition Method 

      Kristiansen, Trygve; Faltinsen, Odd Magnus (Chapter; Peer reviewed, 2011)

    • Hydrodynamic Coefficients of Generic Subsea Modules in Forced Oscillation Tests – Importance of Structure Parts 

      Abrahamsen-Prsic, Mia; Solaas, Frøydis; Kristiansen, Trygve (Chapter; Peer reviewed, 2022)
      A systematic study of the hydrodynamic coefficients for simplified subsea modules has been performed, to support the estimation of the coefficients needed for planning of subsea installation operations. The coefficients ...

    • Investigating a Simplified Model for Moonpool Piston Mode Response in Irregular Waves 

      Ommani, Babak; Kristiansen, Trygve; Berget, Kjetil (ASME digital collection;OMAE2018-78352, Chapter, 2018-06-25)
      Estimating moonpool piston mode response at resonance is important for operation safety. This is a difficult task, in particular, due to nonlinear nature of the moonpool response connected to the damping imposed by the ...

    • Mooring Loads of a Circular Net Cage with Elastic Floater in Waves and Current 

      Kristiansen, Trygve; Faltinsen, Odd Magnus (Chapter; Peer reviewed, 2012)
      The mooring loads on an aquaculture net cage in current and waves are investigated by dedicated model tests and numerical simulations. The main purpose is to investigate which physical effects are dominant for mooring ...

    • On Common Research Needs for the Next Generation of Floating Support Structures 

      Aksnes, Vegard Øgård; Alsos, Hagbart Skage; Bachynski-Polic, Erin Elizabeth; Berthelsen, Petter Andreas; Delhaye, Virgile Roger; Furevik, Birgitte Rugaard; Jostad, Hans Petter; Kristiansen, Trygve; Ommani, Babak (Chapter; Peer reviewed, 2022)
      The world is facing several industrial and societal challenges, such as providing enough renewable energy and enough safe and healthy food as formulated in the United Nations sustainable development goals. Using floating ...

    • A Physical-Based Damping Model of Gap and Moonpool Resonance in WAMIT 

      Ravinthrakumar, Senthuran; Ommani, Babak; Kristiansen, Trygve; Olimb, Idunn; Lyngvær, Bernt Karsten (Chapter; Peer reviewed, 2022)
      An engineering model to estimate and incorporate quadratic damping of the piston-mode moonpool responses in the proximity of the piston mode period is proposed. The model provides a physical-based equivalent linearized ...

    • Sloshing-induced motions of a spar inside a cylindrical dock with baffles in waves 

      Moreau, Mael Korentin Ivan; Kristiansen, Trygve; Ommani, Babak; Molin, Bernard Jean-Marie (Peer reviewed; Journal article, 2023)
      The motions of a free floating offshore wind turbine’s (OWT) spar-type platform inside a bottom-less moored cylindrical dock are investigated for incident wave frequencies near the first lateral sloshing resonance, focusing ...

    • The influence of fish on the mooring loads of a floating net cage 

      He, Zhao; Faltinsen, Odd Magnus; Fredheim, Arne; Kristiansen, Trygve (Journal article; Peer reviewed, 2018)
      The influence of fish on the mooring loads of a floating net cage is studied numerically and experimentally. Two experimental series were conducted. One case was model tests with artificial fish. Nine rigid fish models ...

    • An upright bottomless vertical cylinder with baffles floating in waves 

      Moreau, Mael Korentin Ivan; Kristiansen, Trygve; Ommani, Babak; Molin, Bernard Jean Marie (Peer reviewed; Journal article, 2022)
      Damping of the surge and pitch motions, as well as the first lateral sloshing mode in a rigid free-floating upright circular dock with bilge boxes and open bottom is investigated. Model tests are carried out on a 0.80 m ...