Blar i Institutt for marin teknikk på tittel
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A Comparison Study on the Hydroelasticity of Two Types of Floating Bridges in Inhomogeneous Wave Conditions
(Chapter, 2018)Due to the interaction between elastic structural deformations and fluid motions, the responses of floating bridges should be analyzed by hydroelasticity methods. We firstly employed a linear time-domain approach, based ... -
A comprehensive numerical investigation of the impact behaviour of an offshore wind turbine blade due to impact loads during installation
(Journal article, 2019)For installing offshore wind turbines into deep waters, use of floating crane vessels is essential. One of the major challenges is their sensitivity to wave-induced vessel and crane tip motions, which can cause the impact ... -
A Comprehensive Survey of Prognostics and Health Management based on Deep Learning for Autonomous Ships
(Journal article; Peer reviewed, 2019)The maritime industry widely expects to have autonomous and semiautonomous ships (autoships) in the near future. In order to operate and maintain complex and integrated systems in a safe, efficient, and cost-beneficial ... -
A Crane Overload Protection Controller for Blade Lifting Operation Based on Model Predictive Control
(Journal article; Peer reviewed, 2019)Lifting is a frequently used offshore operation. In this paper, a nonlinear model predictive control (NMPC) scheme is proposed to overcome the sudden peak tension and snap loads in the lifting wires caused by lifting speed ... -
A Decision Support Methodology for Strategic Planning Under Uncertainty in Maritime Transportation
(Master thesis, 2012)Measured in volume approximately 80 % of world trade is carried at sea and with just as many different actors the shipping industry acts close to a perfect market. The highly volatile nature of the industry with unexpected ... -
A Decision Support Model for Merchant Vessels Operating on the Arctic Sea
(Master thesis, 2012)With the ice cap diminishing rapidly on the Arctic Sea, the opportunity of using the Northern Sea Route (NSR) increases correspondingly. However, the climate and presence of ice on the NSR sets additional requirements, ... -
A depth semi-averaged model for coastal dynamics
(Journal article, 2017)The present work extends the semi-integrated method proposed by Antuono and Brocchini [“Beyond Boussinesq-type equations: Semi-integrated models for coastal dynamics,” Phys. Fluids 25(1), 016603 (2013)], which comprises a ... -
A design methodology for resilience in fleets for service operations
(Chapter, 2016)In this paper, we present a new conceptual design methodology for increasing the resilience in complex operations involving a fleet of ships. The objective of the methodology is to support design decisions to reduce ... -
A discrete-modules-based frequency domain hydroelasticity method for floating structures in inhomogeneous sea conditions
(Journal article; Peer reviewed, 2017)Based on the three-dimensional (3D) potential theory and finite element method (FEM), this paper proposes a new numerical method for hydroelastic predictions of floating structures in inhomogeneous seabed and wave field ... -
A discussion of risk influencing factors for maritime accidents based on investigation reports
(Chapter, 2017)This paper reports findings from a review of investigation reports from maritime accidents. Based on a systematic analysis of 95 reports, we discuss a selection of typical causes and circumstances for serious maritime ... -
A Discussion of Technical Challenges and Operational Limits for Towing Operations
(Master thesis, 2017)This thesis is written on the subject of marine towing operations. The purpose of the thesis is to identify and discuss technical challenges related to towing operations with respect to safety and operability. In addition, ... -
A displacement-free formulation for the Timoshenko beam problem and a corresponding isogeometric collocation approach
(Journal article; Peer reviewed, 2017)We present a reformulation of the classical Timoshenko beam problem, resulting in a single differential equation with the rotation as the only primal variable. We show that this formulation is equivalent to the standard ... -
A distributed anti-collision decision support formulation in multi-ship encounter situations under COLREGs
(Journal article; Peer reviewed, 2015)A multi-ship anti-collision decision support formulation is studied in a distributed and real time way. Under the general requirements from COLREGs rules and regulations, the performance of course alteration and changing ... -
A domain-decomposition strategy for a compressible multi-phase flow interacting with a structure
(Journal article, 2014)The problem of a high-pressure gas cavity and its interaction with surrounding liquid and a close-by structure is examined numerically. Even though this is of interest in many practical applications, here, the focus is on ... -
A Feasibility Study of a Renewable Energy Supply for an Offshore Oil and Gas Installation
(Master thesis, 2022)En hydrodynamisk studie av en flytende vindturbin plassert i Nordsjøen på 130 meters dyp er utført. OO Star Wind Floater som består av en halvt nedsenkbar konstruksjon som støtter referansevindturbinen DTU 10 MW. Den ... -
A Feasibility Study of a Renewable-Energy Supply for an Offshore Oil and Gas Installation
(Master thesis, 2022)En hydrodynamisk studie av en flytende vindturbin plassert i Nordsjøen på 130 meters dyp er utført. OO Star Wind Floater som består av en halvt nedsenkbar konstruksjon som støtter referansevindturbinen DTU 10 MW. Den ... -
A Fluid-Structure Interaction study of flexible net sheet in uniform flow A comparative study between experiments and CFD
(Master thesis, 2021)Offshore aquaculture is a growing field with enormous potential. However, due to harsh condition in these site leads to higher loads. To effectively predict the hydrodynamic behaviour of flexible net in these conditions ... -
A Formal Safety Assessment for Cruise Vessels Along the Norwegian Coast
(Master thesis, 2021)Cruisebransjen vokser over hele verden, og har blitt en stor industri i Norge. Den er spådd å fortsette å ha en solid vekst de neste tiårene, hvor trenden er større skip som frakter flere passasjerer. Cruisetrafikk langs ... -
A framework for cost-benefit analysis on use of condition based maintenance in an IO perspective
(Master thesis, 2011)The maintenance costs of an offshore production platform make up about 30 % of the daily costs, and this is not including the cost of shutdown caused by functional failure. Reducing the maintenance costs will have a great ... -
A framework for isogeometric-analysis-based optimization of wind turbine blade structures
(Journal article; Peer reviewed, 2018)Early‐stage wind turbine blade design usually relies heavily on low‐fidelity structural models; high‐fidelity, finite‐element‐based structural analyses are reserved for later design stages because of their complex workflows ...