• A large scale simulation of floe-ice fractures and validation against full-scale scenario 

      Lu, Wenjun; Heyn, Hans-Martin; Lubbad, Raed; Løset, Sveinung (Journal article; Peer reviewed, 2018)
      While interacting with a sloping structure, an ice floe may fracture in different patterns. For example, it can be local bending failure or global splitting failure depending on the contact properties, geometry and confinement ...
    • An implicit time-stepping scheme and an improved contact model for ice-structure interaction simulations 

      van den Berg, Marnix; Lubbad, Raed; Løset, Sveinung (Journal article; Peer reviewed, 2018)
      This paper presents a novel time-stepping scheme for the modelling of discrete ice-structure interaction. The scheme extends the non-smooth discrete element modelling (NDEM) technique to enable compliant continuous and ...
    • An overview of the Oden Arctic Technology Research Cruise 2015 (OATRC2015) and numerical simulations performed with SAMS driven by data collected during the cruise 

      Lubbad, Raed; Løset, Sveinung; Lu, Wenjun; Tsarau, Andrei; van den Berg, Marnix (Journal article; Peer reviewed, 2018)
      In the autumn of 2015, the Norwegian University of Science and Technology (NTNU) and the Swedish Polar Research Secretariat (SPRS) performed a research cruise named the “Oden Arctic Technology Research Cruise 2015” ...
    • Assessment of Impact of Dredging on Sediment Transport at Borg Port 

      Bengtson, Maren Elise (Master thesis, 2019)
      Målet for denne masteroppgaven har vært å modellere hvordan sedimenter spres under mudringsoperasjoner. En numerisk modell for et utvalgt prosjekt, Borg Havns planlagte mudringsprosjekt, er blitt utarbeidet ved å bruke ...
    • Exploring time-delay-based numerical differentiation using principal component analysis 

      Li, Hongtao; Gedikli, Ersegun Deniz; Lubbad, Raed (Peer reviewed; Journal article, 2020)
      Natural systems, including the dynamics of engineered structures, are often considered complex; hence, engineers employ different statistical methods to understand these systems better. Analyzing these systems usually ...
    • Laboratory study of ice floes collisions under wave action 

      Li, Hongtao; Lubbad, Raed (Journal article; Peer reviewed, 2018)
      This paper examines the experimental data on ice floes collisions from the HYDRALAB+ Transnational Access project: Loads on Structure and Waves in Ice (LS-WICE). The paper quantifies the contribution from ice-floes collisions ...
    • Laboratory study of wave-induced flexural motion of ice floes 

      Li, Hongtao; Gedikli, Ersegun Deniz; Lubbad, Raed (Peer reviewed; Journal article, 2021)
      Wave-ice interactions involve complex physical processes. Well-designed laboratory investigations are indispensable for studying these processes. In the present study, laboratory experimental data on saline ice obtained ...
    • Measurements and Modelling of Arctic Coastal Environments 

      Monteban, Dennis (Doctoral theses at NTNU;2020:213, Doctoral thesis, 2020)
      The most pronounced effects of climate change are observed in the polar regions, especially in the Arctic, which is currently warming more rapidly than the rest of the world. The Arctic is losing sea ice, and the oceans ...
    • Parallel channels' fracturing mechanism during ice management operations. Part I: Theory 

      Lu, Wenjun; Lubbad, Raed; Shestov, Aleksey; Løset, Sveinung (Journal article; Peer reviewed, 2018)
      It is frequently observed that long cracks in sea-ice tend to form between parallel channels during ice management operations. The long cracks that develop play an important role in reducing the size of the managed ice ...
    • Parallel channels' fracturing mechanism during ice management operations. Part II: Experiment 

      Lu, Wenjun; Lubbad, Raed; Løset, Sveinung (Journal article; Peer reviewed, 2018)
      During ice management operations, cutting parallel channels with narrow spacing in the ice using icebreakers can effectively reduce the size of ice floes reaching the protected vessel/structure. A narrow channel spacing ...
    • Quantifying Icebreaker Performance in Ice Management Operations by High-Fidelity Numerical Simulations 

      Bjørnø, Jon; van den Berg, Marnix; Lu, Wenjun; Skjetne, Roger; Lubbad, Raed; Løset, Sveinung (Chapter, 2020)
      In the study presented in this paper, the problem of quantifying the performance of icebreaker operations within ice management (IM) has been targeted, using the capabilities of high-fidelity simulations by a discrete ...
    • Review of wave-ice interaction studies 

      Li, Hongtao; Lubbad, Raed; Monteban, Dennis (Chapter, 2018)
      In the past several decades, sea-ice cover in the Arctic Ocean advances later than usual in the autumns and retreats earlier in the springs due to climate change. Concomitantly, total area of ice cover reduces and average ...
    • Sentinel-1 sar observations of peak wavelength and dominant wave direction in the marginal ice zone of the barents sea 

      Monteban, Dennis; Lubbad, Raed; Johnsen, Harald (Journal article; Peer reviewed, 2019)
      Synthetic aperture radar (SAR) has proven to be a very important source of data in the Polar regions because it covers large areas continuously, independent of the weather and time of day. In this study, we make use of ...
    • Simulator for Arctic Marine Structures (SAMS) 

      Lubbad, Raed; Løset, Sveinung; Lu, Wenjun; Tsarau, Andrei; van den Berg, Marnix (Chapter; Peer reviewed, 2018)
      As offshore activities in the Arctic constitute a relatively new field with only a handful of relevant operations to draw experience from, and since full-scale trials are extremely expensive, there is an expressed need for ...
    • Splitting as a Load Releasing Mechanism for a Floater in Ice 

      Lindseth, Sverre Haug (Master thesis, 2013)
      This master thesis divided into three parts: 1) A literature review on available literature concerning ice, fracture mechanics and theories for splitting of ice floes; 2) The development of a robust criterion for determination ...
    • Stålkai som ro/ro-rampe 

      Vevatne, Jens Kristian S (Master thesis, 2014)
      Denne oppgaven handler om prosjektering av en kai i forbindelse med en havneutvidelse. Kaien skal fungere som en ro/ro-kai hvor det legges til rette for at lasten kan rulles på lasteskipet og rulles av på destinasjonen. ...
    • Systematic investigation of data analysis methods in wave-ice interaction problem 

      Li, Hongtao; Gedikli, Ersegun Deniz; Lubbad, Raed (Chapter, 2020)
      Wave climate and extent of ice cover in the Arctic ocean have changed significantly in recent decades. Concomitantly, interest in studying wave-ice interaction has rapidly increased in the last two decades. Laboratory-scale ...
    • Toward a holistic load model for structures in broken ice 

      Kim, Ekaterina; Lu, Wenjun; Lubbad, Raed; Løset, Sveinung; Amdahl, Jørgen (Journal article; Peer reviewed, 2015)
      Over the past decade we have seen an increase in marine operations in Arctic waters. Despite research and work on several offshore standards and ship rules, the ice loads on fixed and floating structures are not fully ...