Blar i Institutt for marin teknikk på tidsskrift "Ocean Engineering"
Viser treff 61-80 av 133
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Ice rose diagrams for probabilistic characterization of the ice drift behavior in the Beaufort Sea
(Journal article; Peer reviewed, 2022) -
Impact of simulation model fidelity and simulation method on ship operational performance evaluation in sea passage scenarios
(Journal article; Peer reviewed, 2019)In this paper, we present and investigate important factors that influence a vessels fuel consumption during operation and what model fidelity that is required to adequately capture these factors in fuel consumption ... -
Investigating tradeoffs between performance, cost and flexibility for reconfigurable offshore ships
(Journal article, 2018)This paper investigates tradeoffs between technical performance, cost and flexibility level for reconfigurable offshore ships. An offshore ship can be configured with various types of equipment; thus, its base structure ... -
Large Eddy Simulations of flow around a smooth circular cylinder in a uniform current in the subcritical flow regime
(Journal article; Peer reviewed, 2014)Three-dimensional flow around a circular cylinder in a steady, uniform current at subcritical Reynolds numbers (Re) is investigated. The flow is simulated using Large Eddy Simulations (LES) with Smagorinsky subgrid scale ... -
Long-term joint distribution of environmental conditions in a Norwegian fjord for design of floating bridges
(Journal article; Peer reviewed, 2019)A floating bridge is an attractive solution for crossing wide and deep fjords. To design a reliable and cost-effective floating bridge, it is very important to accurately evaluate the long-term environmental conditions at ... -
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 ... -
A meta-model for added resistance in waves
(Peer reviewed; Journal article, 2022)In this paper, we perform a comprehensive study of various semi-empirical methods using publicly accessible experimental data on added resistance in waves with different ship types and conditions. Based on the analysis ... -
Method for Real-Time Hybrid Model Testing of ocean structures: Case study on horizontal mooring systems
(Journal article; Peer reviewed, 2019)This paper presents a method for Real-Time Hybrid Model testing (ReaTHM testing) of ocean structures. ReaTHM testing is an extension to traditional hydrodynamic model-scale testing, where the system under study is partitioned ... -
Methodology for assessment of the operational limits and operability of marine operations
(Journal article; Peer reviewed, 2016)This paper deals with a general methodology for assessment of the operational limits and the operability of marine operations during the planning phase with emphasis on offshore wind turbine (OWT) installation activities. ... -
Model-free anti-swing control of complex-shaped payload with offshore floating cranes and a large number of lift wires
(Peer reviewed; Journal article, 2021)Being one of the most commonly used offshore operations, offshore lifting operations become increasingly challenging due to the gradually growing size and weight of payloads. The research on automatic control in lifting ... -
Modified environmental contour method to determine the long-term extreme responses of a semi-submersible wind turbine
(Journal article; Peer reviewed, 2017)In this paper, the modified environmental contour method (MECM) for long-term extreme response prediction are explained and tested for the OC4 DeepCwind 5-MW semi-submersible wind turbine with the environmental conditions ... -
A new method for optimal ship design in real sea states using the ship power profile
(Peer reviewed; Journal article, 2022)Typically, ships are designed for calm water and a constant design speed. However, a ship experiences different speeds and sea conditions over her lifetime. Following the significant correlations between environment and ... -
Nonlinear bending behavior of a multilayer copper conductor in a dynamic power cable
(Peer reviewed; Journal article, 2022)Reciprocating bending behavior is the main factor leading to the fatigue failure of dynamic power cables. However, in the research on the reciprocating bending behavior of dynamic cables, only the mechanical properties of ... -
Nonlinear bending behavior of a multilayer copper conductor in a dynamic power cable
(Journal article; Peer reviewed, 2022)Reciprocating bending behavior is the main factor leading to the fatigue failure of dynamic power cables. However, in the research on the reciprocating bending behavior of dynamic cables, only the mechanical properties of ... -
A novel design approach for estimation of extreme load responses of a 10-MW floating semi-submersible type floating wind turbine
(Journal article; Peer reviewed, 2022)Offshore structures are constructed to withstand extreme wind and wave-induced loads, so studying these extreme loads is vital as it allows offshore structures, e.g., wind turbines, to be designed and operated with minimal ... -
A novel method for estimating missing values in ship principal data
(Peer reviewed; Journal article, 2022)Missing values in the fleet data set acquired in the marine sector reduce the data available for analysis, which can decrease the statistical power of the model and negatively affects the energy-efficient operation and ... -
Numerical analysis of buckling failure in flexible pipe armor wires
(Journal article; Peer reviewed, 2015)Flexible pipes may be exposed to high axial compression and bending during deep-water installation. As the compression force is mainly sustained by the tensile armor layers, this may result in localized lateral or radial ... -
Numerical analysis of local and global responses of an offshore fish farm subjected to ship impacts
(Journal article; Peer reviewed, 2019)Due to limited nearshore areas and great impact to local ecosystems, the aquaculture industry is moving the fish farms into more exposed sea regions where the environmental conditions are much more severe. Like other ... -
Numerical investigations of a prestressed pontoon wall subjected to ship collision loads
(Journal article; Peer reviewed, 2019)The paper presents a numerical investigation of the ship collision response for a floating pontoon. High fidelity finite element models of a container ship bow and a prestressed concrete pontoon wall are established. The ... -
Numerical modeling of nonstationary hydrodynamic forces and induced motions of a coupled offshore floating installation system
(Peer reviewed; Journal article, 2022)Offshore installations always involve multi-body systems in which the hydrodynamic and mechanical interactions are complicated for the properties keep changing under certain operation procedures. Float-over deck (FOD) ...