Blar i SINTEF Open på tidsskrift "Ocean Engineering"
Viser treff 1-20 av 39
-
3D motion dynamics of axisymmetric bodies falling through water
(Journal article; Peer reviewed, 2018-12-01)A new simplified method for analysis of 3D motion dynamics of axisymmetric slender bodies falling from air through water is presented. Slender-body theory for potential flow of incompressible water is combined with 2D + t ... -
Assessment of nylon versus polyester ropes for mooring of floating wind turbines
(Journal article; Peer reviewed, 2023)With the development of floating wind turbines comes the need for mooring systems suitable for shallow water depths. Compliance becomes challenging for mooring systems composed of chain and wire rope. Polyester ropes can ... -
Characteristic current flow through a stocked conical sea-cage with permeable lice shielding skirt
(Peer reviewed; Journal article, 2021)The characteristic current flow field around a 55 m deep full-scale stocked conical Atlantic salmon sea-cage equipped with a 10 m permeable skirt was studied experimentally using acoustic Doppler velocimeters and profilers. ... -
Comparative investigation: Closed versus semi-closed vertical cylinder-shaped fish cage in waves
(Peer reviewed; Journal article, 2022) -
Data analysis on marine engine operating regions in relation to ship navigation
(Journal article; Peer reviewed, 2016-12-01)Data analysis techniques to understand marine engine operating regions as a part of the ship energy efficiency management plan (SEEMP) are proposed in this study. The SEEMP enforces to improve ship energy efficiency under ... -
Decarbonizing bulk shipping combining ship design and alternative power
(Peer reviewed; Journal article, 2022)The Sixth Assessment Report by the Intergovernmental Panel on Climate Change (IPCC) stresses the urgency to rapidly reduce global Greenhouse Gas (GHG) emissions to contain global warming. The main focus in the design of ... -
Detection of mooring line failures using Dynamic Hypothesis Testing
(Journal article; Peer reviewed, 2018-07-01)This article proposes a novel methodology for the detection of mooring line breakage in thruster assisted position mooring (PM) systems, when no measurements of the tensions on the mooring lines are available. For dynamic ... -
Efficacy testing of novel antifouling systems for marine sensors
(Peer reviewed; Journal article, 2021)Marine sensors are widely employed tools for remotely providing a representation of their environment. The primary factor limiting measurement accuracy and deployment longevity is biofouling. For prevention, copper is the ... -
An environmental disturbance observer framework for autonomous surface vessels
(Peer reviewed; Journal article, 2023)This paper proposes a robust disturbance observer framework for maritime autonomous surface vessels considering model and measurement uncertainties. The core contribution lies in a nonlinear disturbance observer, reconstructing ... -
Estimation of Directional Sea Spectra from Ship Motions in Sea Trials
(Journal article; Peer reviewed, 2017)This paper compares the skill of two algorithms that enable real-time estimation of the directional wave spectra exciting a ship from its measured motions. One algorithm consists of a nonlinear optimization of a parametric ... -
Experimental and numerical study of a top tensioned drilling riser subjected to vessel motion
(Journal article; Peer reviewed, 2019-01-01)Model tests of a top tensioned riser (TTR) model were carried out as a part of a joint industry project, with the purpose of better understanding the dynamic behaviour of drilling riser and verifying the calculations of ... -
Experimental investigation of a closed vertical cylinder-shaped fish cage in waves
(Peer reviewed; Journal article, 2021)Wave-induced response of a closed floating fish cage consisting of a vertical circular cylinder with an external toroidal floater is studied theoretically and experimentally. A main purpose was to investigate how the ... -
Fatigue reliability of mooring chains, including mean load and corrosion effects
(Peer reviewed; Journal article, 2022)A reliability formulation for mooring chain fatigue is developed, including the effects of mean load and degradation due to corrosion. They are included by starting from a S-N model with parameterized dependence to the ... -
Fuzzy time series forecasting of nonstationary wind and wave data
(Journal article; Peer reviewed, 2016-07-15)In this paper, the well-known Fuzzy Inference Systems (FIS) in combination with Adaptive Network-based Fuzzy Inference Systems (ANFIS) are coupled for the first time with a nonstationary time series modelling for an improved ... -
Global dynamic response analysis of oil storage tank in finite water depth: Focusing on fender mooring system parameter design
(Journal article; Peer reviewed, 2018-01-15)A modular floating concept for oil storage is proposed. The concept is composed of several modular floating tanks and barges. The floating tanks are self-stable and designed for storage of oil and hydrocarbon material. The ... -
Hydrodynamic testing of wind-assisted cargo ships using a cyber–physical method
(Peer reviewed; Journal article, 2021)A novel empirical method to study wind-assisted cargo ships is presented. The physical ship model, including propulsion units, interacts in real-time with a numerical sail model during free-running tests. Loads from the ... -
Improving safety of interactions between conventional and autonomous ships
(Peer reviewed; Journal article, 2023)Automatic controllers work best when the system they control can be sufficiently well modelled. This is a problem for control of autonomous ships in mixed traffic situations where the autonomous ship interacts with ... -
An integrated approach for monitoring structural deformation of aquaculture net cages
(Peer reviewed; Journal article, 2021)The majority of present marine finfish production is conducted in flexible net cages which can deform when they are subjected to water movements generated by currents. The ability to monitor net deformation is important ... -
Large-scale shear test of brash ice
(Peer reviewed; Journal article, 2022)A large-scale shear apparatus has been originally developed and built to test the mechanical properties of coarsegrained material. It was used to evaluate the shear behaviour of brash ice. The brash ice blocks were collected ... -
Loads and response on flexible conical and cylindrical fish cages: A numerical and experimental study based on full-scale values
(Journal article; Peer reviewed, 2020-11-15)This paper presents drag forces from uniform water current on two flexible net cage designs, commonly used in Norwegian fish farming, obtained through model-scale testing and numerical simulations. The primary focus is on ...