Blar i Fakultet for ingeniørvitenskap (IV) på tidsskrift "Ocean Engineering"
Viser treff 21-40 av 159
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A benchmarking exercise for environmental contours
(Peer reviewed; Journal article, 2021)Environmental contours are used to simplify the process of design response analysis. A wide variety of contour methods exist; however, there have been a very limited number of comparisons of these methods to date. This ... -
Breaking Wave Interaction with a Vertical Cylinder and the Effect of Breaker Location
(Journal article; Peer reviewed, 2016)The open-source CFD model REEF3D is used to simulate plunging breaking wave forces on a vertical cylinder. The numerical results are compared with data from the experiments carried out at the Large Wave Channel, Hannover, ... -
CFD Investigations of Wave Interaction with a Pair of Large Tandem Cylinders
(Journal article; Peer reviewed, 2015)Wave forces and the flow field around cylinders placed in a periodic wave field are investigated with a numerical model using the Reynolds-averaged Navier–Stokes equations. The numerical model is validated by simulating ... -
Changes in surge and pitch decay periods of floating wind turbines for varying wind speed
(Journal article; Peer reviewed, 2019)Recently published experimental results show variations in surge and pitch decay periods of floating wind turbines (FWTs) subjected to different incident wind velocities. This paper explores the external loads acting on a ... -
Comparative experimental study of the survivability of a combined wind and wave energy converter in two testing facilities
(Journal article; Peer reviewed, 2016)Combining the offshore wind and wave energy on an integrated structure or in a farm configuration is beneficial for cost reduction since they could share the infrastructure and the ocean space. The spar torus combination ... -
Comparative investigation: Closed versus semi-closed vertical cylinder-shaped fish cage in waves
(Journal article; Peer reviewed, 2022)A comparative analysis between a closed cage (CC) and a semi-closed/open-bottom cage (OC) in regular, white-noise and irregular waves is presented. Both cages consist of a vertical circular free surface-piercing cylinder ... -
Compensation of bias loads in dynamic positioning of marine surface vessels
(Journal article; Peer reviewed, 2019)This paper investigates different methods for compensating the mean and slowly varying environmental loads, and unmodeled dynamics (bias loads) in dynamic positioning of marine vessels. Four different methods are compared; ... -
Constrained multi-body dynamics for modular underwater robots — Theory and experiments
(Journal article, 2018)This paper investigates the problem of modelling a system of interconnected underwater robots with highly coupled dynamics. The objective is to develop a mathematical description of the system that captures its most ... -
Critical assessment of non-linear hydrodynamic load models for a fully flexible monopile offshore wind turbine
(Journal article; Peer reviewed, 2018)This paper presents a comparison between experimental data of a model-scale 4 MW monopile offshore wind turbine subjected to extreme irregular sea states in finite water and the numerical models suggested in offshore wind ... -
Data-driven Uncertainty and Sensitivity Analysis for Ship Motion Modeling in Offshore Operations
(Journal article; Peer reviewed, 2019)To build a compact data-driven ship motion model for offshore operations that require high control safety, it is necessary to select the most influential parameters and to analyze the uncertainty of the input parameters. ... -
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 ... -
Deriving spatial wave data from a network of buoys and ships
(Peer reviewed; Journal article, 2023)The real-time provision of high-quality estimates of the ocean wave parameters at appropriate spatial resolutions are essential for the sustainable operations of marine structures. Machine learning affords considerable ... -
Deriving the absolute wave spectrum from an encountered distribution of wave energy spectral densities
(Journal article; Peer reviewed, 2018)The objective of ship motion-based wave spectrum estimation is to provide the distribution of wave energy densities in absolute domain. However, as a ship generally advances relative to the progressing waves, any spectrum ... -
Design and comparative analysis of alternative mooring systems for floating wind turbines in shallow water with emphasis on ultimate limit state design
(Journal article; Peer reviewed, 2021)Floating wind turbines represent a cost-efficient energy solution in deep water where bottom-fixed wind turbine becomes excessively expensive. However, mooring design is quite challenging for all shallow water depths ... -
Detection of mooring line failures using Dynamic Hypothesis Testing
(Journal article; Peer reviewed, 2018)Abstract 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 ... -
Determinants, methods, and solutions of evacuation models for passenger ships: A systematic literature review
(Peer reviewed; Journal article, 2022)Passenger ships facilitate the mobility of people at sea and are a significant revenue stream for societies. Simultaneously, they should meet safety standards. One of the main safety pillars is offering passengers a reliable ... -
Determination of extreme responses of USFG’s equilibrium glide path hovering in ocean current
(Journal article; Peer reviewed, 2022) -
Development and application of a simulator for offshore wind turbine blades installation
(Journal article, 2018)In an offshore environment, offshore wind energy resources are more available and stable, but the investment cost is much higher than that of onshore wind. The installation cost is a crucial factor of the investment. With ... -
Development and validation of speed loss for a blunt-shaped ship in two rough sea voyages in the Southern Hemisphere
(Journal article; Peer reviewed, 2017)Maritime transportation is becoming increasingly complex owing to the fluctuation of oil prices, the introduction of environmental guidelines, and the onset of climate change. Although optimal routing has been researched ... -
Development of risk indicators for losing navigational control of autonomous ships
(Peer reviewed; Journal article, 2022)As autonomous ships become more viable, appropriate risk indicators are increasingly needed. In the existing literature, few works are related to developing such risk indicators. Existing indicators are general and not ...