Blar i Publikasjoner fra CRIStin - NTNU på tidsskrift "Ocean Engineering"
Viser treff 21-40 av 178
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Automatic Dock-to-Dock Control System for Surface Vessels using Bumpless Transfer
(Peer reviewed; Journal article, 2023)This paper proposes and demonstrates an automatic steering system designed for passenger ferries with dock-to-dock capabilities. The method consists of a modular control architecture and bumpless transfer transition ... -
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 ... -
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. ... -
Collaborative collision avoidance for Maritime Autonomous Surface Ships: A review
(Peer reviewed; Journal article, 2022)Collision avoidance algorithms for autonomous ships are frequently proposed, but very few studies consider the interaction and information exchange between ships, and if they do, this is usually limited to only between ... -
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 ... -
Comparison of two second-order sliding mode control algorithms for an articulated intervention-AUV: Theory and experimental results
(Peer reviewed; Journal article, 2021)An articulated intervention autonomous underwater vehicle (AIAUV) is a slender, multi-articulated underwater robot. Accurate trajectory tracking is essential for AIAUV operations. Furthermore, due to hydrodynamic and ... -
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 ... -
Current profile analysis and extreme value prediction in the LH11-1 oil field of the South China Sea based on prototype monitoring
(Journal article; Peer reviewed, 2018)Current is a key ocean-environmental factor and exhibits strong non-stationary random characteristics. The complexities of current modeling present significant challenges for deep sea oil exploitation. The multiyear return ... -
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 ...