Browsing Institutt for marin teknikk by Title
Now showing items 3218-3237 of 3421
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Trawl interference loads for offshore power cables
(Master thesis, 2020)Målet med denne avhandlingen var å undersøke hvilke trållaster som oppstår som en følge av interaksjon mellom klumpvekter og offshore kraftkabler med fokus på pull-over stadiet. I tillegg skulle sensitivitet av treffvinkel, ... -
Truncated least square support vector machine for parameter estimation of a nonlinear manoeuvring model based on PMM tests
(Journal article; Peer reviewed, 2020)A new version of least square support vector machine (LS-SVM), the truncated LS-SVM, is proposed to estimate the nondimensionalized hydrodynamic coefficients. Truncated LS-SVM is shown to be an efficient and robust method ... -
Tuning of transfer functions for analysis of wave–ship interactions
(Peer reviewed; Journal article, 2021)Transfer functions are often used together with a wave spectrum for analysis of wave–ship interactions, where one application addresses the prediction of wave-induced motions or other types of global responses. This paper ... -
Tuning of vessel parameters including sea state dependent roll damping
(Peer reviewed; Journal article, 2021)Online tuning of vessel models based on onboard measurement data can reduce the uncertainties of vessel motion prediction, and therefore potentially increase the safety and cost efficiency for marine operations. Among the ... -
Turbulence modeling of transverse flow on ship hulls in shallow water
(Doktoravhandlinger ved NTNU, 1503-8181; 2010:174, Doctoral thesis, 2010)The hydrodynamic forces acting on a ship that travels in restricted water vary greatly with water depth and the geometry of the ship hull. This will affect the ship maneuverability in terms of various flow effects like for ... -
Turbulence Modelling of the Flow Around a Prolate Spheorid
(Master thesis, 2018)In numerous engineering disciplines, including naval and offshore engineering, the accurate prediction of turbulent flows is essential for cost-efficient and safe designs. For industrial applications, the turbulence must ... -
Turbulent flow simulations at higher Reynolds numbers
(Doctoral theses at NTNU;2019:52, Doctoral thesis, 2019)This thesis presents recent advancements in direct numerical simulations of bluff body wake flows. The flow around a circular cylinder without and with special fairings have been studied, and the effect of boundary conditions ... -
Turbulent wake behind a concave curved cylinder
(Journal article; Peer reviewed, 2019)We present a detailed study of the turbulent wake behind a quarter-of-ring curved cylinder at Reynolds number Re = 3900 (based on cylinder diamter and incoming ow velocity), by means of Direct Numerical Simulation (DNS). ... -
Turnaround strategy development: a case study
(Master thesis, 2011)Chapter 2 of this thesis handles the topic Maintenance Management and will establish a platform of word and abbreviations that will be used through the rest of the paper. Also maintenance theory of failure characteristics ... -
Two-dimensional experimental and numerical investigations of parallel perforated plates in oscillating and orbital flows
(Peer reviewed; Journal article, 2020)The hydrodynamic loads on two-dimensional perforated plates are investigated experimentally and numerically. Two parallel plate configurations, consisting of an upper perforated plate and a lower perforated plate, are ... -
Two-dimensional experimental and numerical investigations of perforated plates in oscillating flow, orbital flow and incident waves
(Peer reviewed; Journal article, 2020)The hydrodynamic loads on two-dimensional perforated plates are investigated experimentally and numerically. Two single perforated plate configurations, consisting of rows of either circular or square cylinders, are studied. ... -
Two-dimensional ice-structure interaction for offshore wind turbines
(Master thesis, 2020)Abstract will be available on 2023-07-01 -
Two-dimensional Numerical and Experimental Investigation of Hydrodynamic Forces and Wake Interaction between Two or more Square Cylinders in Large-amplitude Oscillatory Flow
(Master thesis, 2022)Denne oppgaven tar for seg og undersøker hydrodynamiske krefter og vakeinteraksjonseffekter mellom sylindre i oscillerende strømning med stor amplitude, sett i en todimensjonal situasjon. Arbeidet er gjort gjennom både ... -
Two-Dimensional Numerical and Experimental Studies of Piston-mode Resonance
(Dr. ingeniøravhandling, 0809-103X; 2009:53, Doctoral thesis, 2009) -
Two-way coupled fluid-structure interaction of gas-liquid slug flow in a flexible riser: Small-scale experiments and simulations
(Journal article; Peer reviewed, 2019)Flexible risers might be subjected to large pressure and density fluctuations when transporting multiphase mixtures as different flow patterns may take place. Those fluctuations might induce large forces on the structure, ... -
Ultimate and residual strength assessments of intact and collision damaged columns of the Bjørnafjorden floating bridge
(Chapter, 2023)The Norwegian Public Road Administration (NPRA) has initiated an ambitious project to replace the current ferry crossing solutions with floating bridges over the wide and deep Norwegian fjords. This will substantially ... -
Ultimate Limit State Analysis of Havfarm
(Master thesis, 2017)Marin fish farming is in rapid development. Dimensions are expected to increase and locations are being moved to areas exposed to more energetic waves and stronger current. With increasing dimensions and more challenging ... -
Ultimate strength analysis of stiffened steel and aluminium panels using semi-analytical methods
(Dr. ingeniøravhandling, 0809-103X; 2002:131, Doctoral thesis, 2002)Buckling and postbuckling of plates and stiffened panels are considered. Computational models for direct calculation of the response are developed using large deflection plate theory and energy principles. Deflections are ... -
Ultimate Strength and Capacity Assessment of Ice Class Vessel Operating in Ice
(Master thesis, 2016)In an ongoing project between DNV GL and a customer, the ultimate strength and damage on a ship exposed to ice loading are to be assessed. The vessel has the DNV GL class notation Ice(1A*), but is now considered for operation ... -
Ultimate Strength and Post-Ultimate Behavior of Hybrid Platform Deck Girders
(Master thesis, 2014)As for the increasing demands of offshore oil and gas, the new platforms are designed in more and more serious conditions. The safety check and modification of the complex structure has become a hot subject. Normally, the ...