Browsing Institutt for marin teknikk by Title
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Wave response of closed flexible bags
(Journal article; Peer reviewed, 2017)Recent environmental considerations, as salmon lice, escape of farmed fish and release of nutrients, have prompted the aquaculture industry to consider the use of closed fish production systems (CFPS). The use of such ... -
Wave runup and wave rundown estimation based on long-term variation of wind statistics
(Journal article; Peer reviewed, 2018)The paper presents a simple analytical method that can be used to estimate wave runup (RU) and wave rundown (RD) on shorelines and coastal structures for sea states based on long-term wind statistics. Eight different ... -
Wave Runup and Wave Rundown on Shorelines and Coastal Structures Based on Long-Term Variation of Wind and Wave Conditions
(Master thesis, 2017)In the resent years the fear of violent storms occuring more often, and with increasing violence, has drawn new attention to research on wave runup and wave rundown. Severe storm conditions could cause great damage on ... -
Wave- and wind-induced responses of the semisubmersible wind energy and flap-type wave energy converter based on experiments
(Journal article; Peer reviewed, 2017)This paper deals with a study of wave and wind induced responses of the combined energy concept SFC in operational and survival conditions based on experimental data. The measured responses that are studied include motions ... -
Wave-in-Deck Forces and Response of Semi-Submersibles
(Master thesis, 2017)In critical sea states, semi-submersibles may experience large negative air gaps in which incoming waves cause large slamming loads that may lead to severe structural deformations. Wave loads due to slamming are difficult ... -
Wave-Induced Accelerations of a Fish-Farm Elastic Floater: Experimental and Numerical Studies
(Chapter; Peer reviewed, 2014)Numerical simulations and experiments of an elastic circular collar of a floating fish farm are reported. The floater model without netting structure is moored with nearly horizontal moorings and tested in regular deep-water ... -
Wave-induced bottom shear stress estimation in shallow water exemplified by using deep water wind statistics
(Journal article; Peer reviewed, 2017)The paper provides a simple and analytical method which can be used to give estimates of the wave-induced bottom shear stress for very rough beds and mud beds in shallow water based on wind statistics in deep water. This ... -
Wave-induced current for long-crested and short-crested random waves
(Journal article; Peer reviewed, 2014)This paper provides a simple analytical tool which can be used to calculate the wave-induced current beneath long-crested (2D) and short-crested (3D) random waves. The approach is based on assuming the waves to be a ... -
Wave-induced nonlinear effects on a pontoon-type Very Large Floating Structures (VLFS)
(Doktoravhandlinger ved NTNU, 1503-8181; 2011:61, Doctoral thesis, 2011)The wave-induced nonlinear effects on the pontoon-type Very Large Floating Structure (VLFS) is investigated in this thesis. Typical dimensions of the pontoon-type VLFS such as a floating airport are 5000m in length, 2000m ... -
Waves and associated currents-experiences from 5 years metocean measurements in the northern North Sea
(Journal article; Peer reviewed, 2019) -
Waves' numerical dispersion and damping due to discrete dispersion relation
(Chapter; Peer reviewed, 2014)In linear Rankine panel method, the discrete linear dispersion relation is solved on a discrete free-surface to capture the free-surface waves generated due to wave-body interactions. Discretization introduces numerical ... -
A weak-scatterer potential flow theory-based model for the hydroelastic analysis of offshore wind turbine substructures
(Peer reviewed; Journal article, 2021)This paper examines the hydroelastic response of a monopile structure, supporting an offshore wind turbine. A new numerical simulation tool is presented, coupling a nonlinear potential flow solver to a structural model ... -
Weather optimal dynamic positioning of underactuated AUVs using output feedback control
(Journal article, 2006)In this paper we present an output feedback control system for dynamic positioning of underactuated AUVs. The control objective is to maintain a desired distance to the target while orienting the vehicle towards the target ... -
Weather Routing of Supply Vessels in the North Sea - Solving the Supply Vessel Weather Routing Problem
(Master thesis, 2015)This thesis is concerned with defining and solving the supply vessel weather routing problem. The particular problem in focus will be Statoil's supply circuit in the middle North Sea, including the Johan Sverdrup oil field. ... -
Weight Margins and Flexibility in Offshore Rigs
(Master thesis, 2013)The subject of this paper is the use of weight margins in the design and fabrication of large offshore oilrigs. Margins are a way of increasing the freedom of choice of the designers and a method of increasing the overall ... -
Wellhead platform subjected to accidental loads
(Master thesis, 2016)Cost reduction in the oil and gas industry forces new and innovative solutions. Unmanned wellhead platforms are alternative solutions for developing small fields which would normally be developed with subsea wellheads. For ... -
Wind and soil model influences on the uncertainty in fatigue of monopile supported wind turbines
(Peer reviewed; Journal article, 2022)Several alternative engineering models are available for the use in analysis of offshore wind turbines. However, it is not always clear which of the models will yield the most accurate or sufficiently conservative results. ... -
Wind load on feed barge
(Master thesis, 2022)Fish is a kind of sustainable food for healthy diet, and it plays an important role in fulfilling human's future needs for healthy food. Norway is the world's largest fish exporter, and nearly half of the Norwegian fish ... -
Wind power plant grid-forming control and influences on the power train and power system oscillation
(Chapter, 2022)In future power systems, wind power plants are supposed to contribute in the voltage and frequency stability of the grid. For this purpose, the control strategy of the wind power-frequency converter system needs to change ... -
Wind Powered Marine Vehicle - A Concept Study
(Master thesis, 2015)In conventional sailboat design, the heeling momentum introduced by the rigid connection of foils in air and water is a limitation on the maximum ve- locity. By removing the hull all together, wetted surface induced drag ...