Blar i NTNU Open på forfatter "Kim, Ekaterina"
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Fluid-structure-interaction analysis of an ice block-structure collision
Song, Ming; Kim, Ekaterina; Amdahl, Jørgen (Journal article; Peer reviewed, 2015)Due to climate change, production and transportation routes in Arctic regions are becoming more prevalent. When operating in Arctic waters, there is a significant risk of high energy encounters with smaller ice masses such ... -
Freeze-Bond Strength: Analysis of Experiments and FE Modeling of a shear test on freeze-bonds
Kim, Ekaterina (Master thesis, 2009) -
How safe were vessels during research cruises in Arctic in 2007-2019? Linking the Ice Watch Data and the Polar Operational Limits Assessment Risk Index System
Øyen, Karin Assev; Kim, Ekaterina (Chapter, 2021)The present work analyzes cruise data from the Ice Watch database and applies the IMO's Polar Operational Limit Assessment Risk Indexing System (POLARIS) with ice observations. The results of this study showed that on ... -
Hybrid causal logic model for estimating the probability of an icebreaker–ship collision in an ice channel during an escort operation along the Northeast Passage
Xu, Sheng; Kim, Ekaterina (Peer reviewed; Journal article, 2023)Under severe Arctic ice conditions, escort operations are the most efficient methods for facilitating shipping. Nevertheless, escort operations are among the most dangerous operations, as they may result in icebreaker–ship ... -
Iceberg shape characterization for damage assessment of accidental impacts with ships and offshore structures
Myhre, Torstein (Master thesis, 2013)The northern areas are becoming more and more attractive because off the large oil and gas reservoir that is there. In this area there is a harsh environment and the possibility to collide with an iceberg increases as the ... -
Laboratory experiments on shared-energy collisions between freshwater ice blocks and a floating steel structure
Kim, Ekaterina; Storheim, Martin; Amdahl, Jørgen; Løset, Sveinung; von Bock und Polach, Rüdiger Ulrich Franz (Journal article; Peer reviewed, 2017)Ship collisions with floating ice in which the ship sustains damage are in the shared-energy regime – both the ice and the ship dissipate energy through inelastic deformations. The physics of these events are rarely studied. ... -
Making sense of speed effects on ice crushing pressure-area relationships in IACS ice-strengthening rules for ships
Kim, Ekaterina; Amdahl, Jørgen; Wang, Xintong (Journal article; Peer reviewed, 2021)Arctic shipping fleet expansion is anticipated in the future. However, future refinements in the understanding of ice loads on larger ships are needed to achieve a better structural design with reduced steel weight. Published ... -
A non-linear viscoelastic material model with progressive damage based on microstructural evolution and phase transition in polycrystalline ice for design against ice impact
Mokhtari, Mojtaba; Kim, Ekaterina; Amdahl, Jørgen (Peer reviewed; Journal article, 2023)This study presents a nonlinear viscoelastic material model incorporating a progressive damage framework with an iterative algorithm for glacial/freshwater polycrystalline ice subject to compressive impact load induced by ... -
Numerical analysis of pit-to-crack transition under corrosion fatigue using a stochastic pit generation algorithm
Mokhtari, Mojtaba; Kim, Ekaterina; Amdahl, Jørgen (Chapter, 2023)In numerical corrosion fatigue studies, the complex pit morphology is often idealized using an overly simplified geometry with a smooth surface because of the difficulties involved in modelling defects with the irregular ... -
Numerical Investigation of Fluid-Ice-Structure Interaction During Collision by an Arbitrary Lagrangian Eulerian Method
Song, Ming; Kim, Ekaterina; Amdahl, Jørgen; Greco, Marilena; Souli, M'Hamed (Chapter; Peer reviewed, 2016)When ice floes collide against marine structures, pronounced hydrodynamic loads are induced by the water-ice-structure interaction. With today’s highly competitive structural design market, it is nearly impossible to ignore ... -
Ocean space utilization
Schreier, Sebastian; Arena, Felice; Bingham, Harry; Fonseca, Nuno; Hu, Zhiqiang; Karmakar, Debabrata; Kim, Ekaterina; Li, Hui; Liu, Pengfei; Murai, Motohiko; Pahos, Spiro J; Tian, Chao; Wang, George (Chapter, 2022)In the light of rising sea level, scarcity of land-based resources and increasingly populated coastal areas, interest of project developers and countries turns towards the ocean, exploring the possibilities of utilizing ... -
On a shifting pressure-area relationship for the accidental limit state analysis of abnormal ice actions
Kim, Ekaterina; Amdahl, Jørgen; Song, Ming (Chapter, 2017)The relationship between pressure and area is often used to describe various ice-structure interaction processes. With knowledge of the nominal contact area and the force, a continuous plot of average pressure versus ... -
On ice model validation and calibration strategies for damage as-sessment of structures subjected to impact actions
Kim, Ekaterina; Song, Ming; Amdahl, Jørgen (Chapter, 2016)The number of numerical ice models in structural design is growing, and classical Lagrangian finite element formulation is still dominant for numerical simulations. In design of ships and offshore structures, the numerical ... -
Optimisation of a New Energy System in Longyearbyen based on LNG and Solar Energy - Applying Mixed Integer Linear Programming and a Rolling Horizon Heuristic
Hovden, Petter (Master thesis, 2018)Longyearbyen is an isolated, Arctic settlement, where the energy situation is facing changes in near future. Today s energy system in Longyearbyen is a stand-alone system, consisting of a coal power plant as primary power ... -
Pilot study of ice-structure interaction in a pendulum accelerator
Storheim, Martin; Nord, Torodd Skjerve; Kim, Ekaterina; Høyland, Knut Vilhelm; Langseth, Magnus; Amdahl, Jørgen; Løset, Sveinung (Journal article; Peer reviewed, 2015)More knowledge on the coupled response of ice and structure in collision in which both bodies undergo permanent damage is needed. These types of experiments are challenging to perform in a laboratory at relatively high ... -
Predicting ship speeds in the Arctic using deep learning on historical AIS data
Kim, Ekaterina; Smestad, Bjørnar Brende; Asbjørnslett, Bjørn Egil (Chapter, 2020)This study offers a perspective of applying fully connected neural networks (NN) to predict vessels’ speeds on a part of the Northern Sea Route and discusses its challenges. A fully connected neural network model was used ... -
Predicting vessel speed in the Arctic without knowing ice conditions using AIS data and decision trees
Rao, Prithvi S.; Kim, Ekaterina; Smestad, Bjørnar Brende; Asbjørnslett, Bjørn Egil; Bhattacharyya, Anirban (Peer reviewed; Journal article, 2021)The vessel speed is one of the important parameters that govern safety, emergency, and transport planning in the Arctic. While previous studies have traditionally relied on physics-based simulations to predict vessel's ... -
Pressure-dependent plasticity models with convex yield loci for explicit ice crushing simulations
Mokhtari, Mojtaba; Kim, Ekaterina; Amdahl, Jørgen (Peer reviewed; Journal article, 2022)Despite the viscous behaviour of crushed ice, plasticity models have been widely used for numerical modelling of ‘design-ice’ in damage assessment applications for several reasons outlined herein. The Crushable Foam (CF) ... -
A Probabilistic Framework for the Fatigue Damage Assessment of Ships Navigating through Level Ice Fields
Zhao, Weidong; Leira, Bernt Johan; Kim, Ekaterina; Feng, Guoqing; Sinsabvarodom, Chana (Journal article, 2021)For ships navigating in ice-covered waters, fatigue damage due to ice loads is an important issue. The purpose of this paper is to provide ship researchers and engineers with a simulation-based procedure for a probabilistic ... -
Probabilistic material modeling of iceberg for analysis of accidental impacts with ships and offshore structures
Bøhlerengen, Simen (Master thesis, 2013)There has been an increasing interest of maritime and offshore operations in the arctic regions for some decades now. In arctic regions there are icebergs which can?t be neglected. The first part of this thesis is an ...