Institutt for marin teknikk
Recent Submissions
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Pressure-dependent plasticity models with convex yield loci for explicit ice crushing simulations
(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) ... -
Comparing Combinations of Linear and Nonlinear Feedback Terms for Ship Motion Control
(Peer reviewed; Journal article, 2020)In this article, combinations of linear and nonlinear feedback terms are investigated for 3 degrees-of-freedom pose and velocity control of ships. Nonlinear control algorithms that are found in the literature often have ... -
Numerical modelling and dynamic response analysis of curved floating bridges with a small rise-span ratio
(Peer reviewed; Journal article, 2020)As a potential option for transportation applications in coastal areas, curved floating bridges with a same small specified rise to span ratio of 0.134, supported by multiple pontoons, are investigated in this paper. Two ... -
Making sense of speed effects on ice crushing pressure-area relationships in IACS ice-strengthening rules for ships
(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 ... -
Optimal configuration problem identification of electrical power cable in tidal turbine farm via traveling salesman problem modeling approach
(Peer reviewed; Journal article, 2019)Electrical power cables in tidal turbine farms contribute a significant share to capital expenditure (CAPEX). As a result, the routing of electrical power cables connecting turbines to cable collector hubs must be designed ... -
Research on operating parameters of T-groove cylindrical gas film seal based on computational fluid dynamics
(Peer reviewed; Journal article, 2019)Cylindrical gas film sealing technology is a new type of dry gas sealing technology. Compared with the face gas film sealing technology, the cylindrical gas film seal presents a strong floating property, which can reduce ... -
Prediction of ships’ speed-power relationship at speed intervals below the design speed
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Numerical study on buckling of aluminum extruded panels considering welding effects
(Peer reviewed; Journal article, 2022)Aluminum extruded panels are increasingly used in marine structures as lightweight solutions. Less welding is needed for such extrusions than traditional built-up panels of welding stiffener to plate sheets. However, the ... -
Instituttet
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Artificial intelligence for ship speed management during navigation in the Arctic
(Peer reviewed; Journal article, 2021)Difficult ice conditions are one of the major threats to ships, shipboard crew, and cargoes carried in Arctic waters. Ship-speed choice is influenced by many factors including the navigational conditions (ice, weather, ... -
Bondline thickness effects on damage tolerance of adhesive joints subjected to localized impact damages: Application to leading edge of wind turbine blades
(Peer reviewed; Journal article, 2021)The leading edges of wind turbine blades are adhesively bonded composite sections that are susceptible to impact loads during offshore installation. The impact loads can cause localized damages at the leading edges that ... -
An Optimal Energy Management System for Marine Hybrid Power Systems
(Chapter, 2021)This paper proposes an optimal control strategy for the energy management system (EMS) of marine hybrid power systems with the objective of reducing operational expenses (OPEX) and environmental emissions. Here, the OPEX ... -
Numerical Simulations of Offshore Towing of Floating Wind Turbines
(Master thesis, 2021)Denne masteroppgaven omhandler marine taue-operasjoner, med hovedvekt på taue-operasjonen til en Hywind Tampen flytende vindturbin. Hovedmålet med oppgaven er å sammenligne resultatene av det totale strekket i linen ved ... -
Adaptive Backstepping Control of Ship Speed Tracking and Hybrid Mode Selection.
(Peer reviewed; Journal article, 2021)This paper investigates the application of adaptive backstepping control to a hybrid power system for ship propulsion, using a main diesel engine in conjunction with a battery for auxiliary power supply. Fuel injection ... -
Modeling of Articulated Underwater Robots for Simulation and Control
(Chapter, 2018)This paper presents a methodology for modeling articulated underwater robots possessing a kinematic tree structure and arbitrary thruster placement. Efficient algorithms for the forward dynamics and the thruster configuration ... -
Numerical modelling of hydrodynamic responses of Ocean Farm 1 in waves and current and validation against model test measurements
(Peer reviewed; Journal article, 2021)With the continuous growing of the aquaculture industry and increasingly limited fish farming sites at close to shore areas both in Norway and worldwide, there is a need to develop fish farms suitable for aquaculture ... -
Mechanical analysis of drilling riser based on pipe-in-pipe model
(Journal article, 2021)Due to the presence of a drill string inside drilling risers, the mechanical analysis becomes somewhat challenging which has attracted attention from design engineers and drilling operators. The purpose of this study is ... -
Integrated optimisation design of a dynamic umbilical based on an approximate model
(Peer reviewed; Journal article, 2021)An optimised design of a dynamic umbilical requires an extreme cross-sectional stress to be maintained within an allowable limit and a fatigue life to be guaranteed to be sufficient. It should be noted that a dynamic ... -
Wave conditions encountered by ships—A report from a larger shipping company based on ERA5
(Peer reviewed; Journal article, 2021)This study reports about the wave conditions encountered by the fleet of Maersk Line. Herein, wave conditions refer to integral wave parameters in terms of significant wave height, zero-upcrossing period, and wave direction ... -
Thermal analysis of marine structural steel EH36 subject to non-spreading cryogenic spills. Part II: finite element analysis
(Peer reviewed; Journal article, 2021)In Part I of this paper, six liquid nitrogen (LN2) pool boiling tests were carried out to locally cool down six different EH36 steel plates to cryogenic temperatures. Leindenfrost and Critical Heat Flux (CHF) points of LN2 ...
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