Browsing Institutt for marin teknikk by Title
Now showing items 2183-2202 of 3421
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Numerical & Experimental Studies on the Hydrodynamic Loads on Square-Shaped and Diamond-Shaped Cylinders in Close Proximity Exposed to a Forced Oscillatory Fluid Flow
(Master thesis, 2023)Denne oppgaven studerer de hydrodynamiske belastningene og kjølvannsinteraksjonen som oppleves av to eller flere sylindre i umiddelbar nærhet av hverandre utsatt for en tvunget harmonisk oscillerende strøm. Dette er først ... -
Numerical Analysis of a Floating Wind Turbine - Global Load Effects in the Tower Structure
(Master thesis, 2016)The OO Star 10 MW is a semi-submersible floater that aims to support a 10 MW wind turbine. It consists of three outer columns with a shaft in the centre. The floater is designed to be built from concrete, and a steel tower ... -
Numerical analysis of a vessel- shaped offshore fish farm
(Journal article; Peer reviewed, 2018)The aquaculture industry is aiming to move fish farms from nearshore areas to open seas because of many attractive advantages in the open water. However, one major challenge is to design the structure to withstand the ... -
Numerical Analysis of Anchor Handling and Fish Trawling Operations in a Safety Perspective
(Doctoral theses at NTNU;2016:166, Doctoral thesis, 2016)A vessel, with slender structures (like mooring line or wire) hanging from the sides or at the stern, handles or transfer objects from one place to another. This is a typical scenario in marine operations. Anchor ... -
Numerical analysis of buckling failure in flexible pipe armor wires
(Journal article; Peer reviewed, 2015)Flexible pipes may be exposed to high axial compression and bending during deep-water installation. As the compression force is mainly sustained by the tensile armor layers, this may result in localized lateral or radial ... -
Numerical Analysis of Combined VIV and Slug Flow in Time Domain
(Chapter; Peer reviewed, 2016)Vortex induced vibrations (VIV) and slug flow are two important aspects for marine risers conveying a multiphase flow, and should be carefully examined due to the influence on the fatigue life of the structure. This article ... -
Numerical analysis of local and global responses of an offshore fish farm subjected to ship impacts
(Journal article; Peer reviewed, 2019)Due to limited nearshore areas and great impact to local ecosystems, the aquaculture industry is moving the fish farms into more exposed sea regions where the environmental conditions are much more severe. Like other ... -
Numerical Analysis of Mooring Systems for Floating Wind Turbines
(Master thesis, 2022)The world is progressing rapidly towards sustainable forms of energy, and the share of electrical energy produced from wind will grow exponentially in the coming years. Subsequently, floating wind turbines are moving towards ... -
Numerical analysis of pit-to-crack transition under corrosion fatigue using a stochastic pit generation algorithm
(Chapter, 2023)In numerical corrosion fatigue studies, the complex pit morphology is often idealized using an overly simplified geometry with a smooth surface because of the difficulties involved in modelling defects with the irregular ... -
Numerical analysis of pit-to-crack transition under corrosion fatigue using a stochastic pit generation algorithm
(Chapter, 2023)In numerical corrosion fatigue studies, the complex pit morphology is often idealized using an overly simplified geometry with a smooth surface because of the difficulties involved in modelling defects with the irregular ... -
Numerical analysis on the generation, propagation and interaction of solitary waves by a Harmonic Polynomial Cell Method
(Journal article; Peer reviewed, 2019)A numerical wave tank based on the Harmonic Polynomial Cell (HPC) method is created to study the generation, propagation and interaction of solitary waves. The HPC method has been proven to be of high accuracy and efficiency ... -
Numerical and analytical studies of ship deckhouse impact with steel and RC bridge girders
(Peer reviewed; Journal article, 2021)Bridges crossing navigable waterways are under the threat of accidental collisions from passing ships. However, previous research focus was mainly placed on ship collision with bridge substructures while ship-bridge ... -
Numerical and experimental hydrodynamic study of a vertical circular floating dock in waves
(Doctoral theses at NTNU;2024:182, Doctoral thesis, 2024)A hydrodynamic analysis of a free-floating bottom-less upright circular dock in waves conceived for the installation of spar-type floating offshore wind turbines (FOWT) is carried out in this work for incident wave frequencies ... -
Numerical and Experimental Investigation of a Floating Offshore Wind Turbine Foundation with a Moonpool and Inner and Outer Skirts
(Master thesis, 2022)Flytende havvind har muligheten til å bli stor bidragsyter for å nå målet om et karbonnøytralt samfunn. Så langt er havvind avhengig av subsidier for å være konkurransedyktig, og innovative og kostnadseffektive løsninger ... -
Numerical and Experimental Investigation of a Floating Substation
(Master thesis, 2023)Konseptet ”Floating Substation” er utviklet av Sevan SSP og har potensial til å bli brukt i flere ulike bransjer, fra offshore vindkraft, karbonfangst og -lagring til offshore akvakultur. Det spesielle med designet er den ... -
Numerical and experimental investigation of a hinged 5-body wave energy converter
(Doktoravhandlinger ved NTNU, 1503-8181; 2014:66, Doctoral thesis, 2014)This thesis deals with modeling and simulation of a hinged 5 body wave energy converter (WEC), including verification by comparison with experimental results. The WEC consists of a shallow draft cylindrical center floater ... -
Numerical and Experimental Investigation of Added Resistance in Waves
(Doktoravhandlinger ved NTNU, 1503-8181; 2011:329, Doctoral thesis, 2011)Added resistance in waves is important for ship powering performance, since ships are travelling most of the time in waves, not in calm water. With increasing focus on fuel consumption and greenhouse gas emissions, there ... -
Numerical and Experimental Investigation of Parametric Roll
(Master thesis, 2013)The main purpose of this Master thesis is to provide insights about thesensitivity of parametric roll occurrence. Parametric roll resonance may leadto large roll angles experienced by the ship typically in longitudinal ... -
Numerical and experimental investigation of stationkeeping in level ice
(Doktoravhandlinger ved NTNU, 1503-8181; 2012:329, Doctoral thesis, 2012)Stationkeeping method is crucial for successful marine operations in ice-covered waters. Depending on the type of structure, two methods are used in the numerical study, namely mooring system and DP combined mooring ... -
Numerical and Experimental Investigation of whipping in Twin Hull Vessels exposed to serve wet Deck slamming
(Dr. ingeniøravhandling, 0809-103X; 2002:86, Doctoral thesis, 2002)An investigation of global structural loads in large twin hull vessels to severe wet deck slamming has been carried out. The study contains two main parts: • An experimental investigation. • Development of a numerical ...