Browsing Institutt for marin teknikk by Issue Date
Now showing items 1-20 of 2751
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Sand waves in free surface flow : a study with emphasis on hydrodynamic aspects
(Doktor ingeniøravhandling;Thesis no. P-1-84, Doctoral thesis, 1984)The problem of sand wave generation in free surface flow has been presented and its engineering and scientific significance has been pointed out. A survey of the existing literature on the subject has been performed. The ... -
Model uncertainty and simplified estimates of long term extremes of hull girder loads in ships
(Dr. ingeniøravhandling; 2000:15, Doctoral thesis, 2000) -
Theoretical and Experimental Studies of Wave Impact Underneatch Decks of Offshore Platforms
(Doktor ingeniøravhandling;2001:35, Doctoral thesis, 2001) -
Sloshing in rectangular tanks and interaction with ship motions
(Doktoravhandlinger ved NTNU, 1503-8181; 16, Doctoral thesis, 2002)Sloshing is a violent resonent free surface flow in a container. The main objective of this thesis has been to study sloshing in rectangular and prismatic tanks. The tank may be excited by a harmonic motion or it may move ... -
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 ... -
Statistical properties of successive ocean wave parameters
(Doctoral thesis, 2003)For random waves the free surface elevation can be described by a number of individual wave parameters. The main objective of this work has been to study the statistical properties of individual parameters in successive ... -
On the suppression of vortex induced vibrations of circular cylinders by radial water jets
(Doktoravhandlinger ved NTNU, 1503-8181; 2003:58, Doctoral thesis, 2003)For oilfield developments in deep water, it is of utmost importance to accurately predict Vortex Induced Vibrations (VIV) of risers and free span pipelines subjected to ocean current. In order to prolong operational life ... -
Three-Dimensional Analysis of Slamming
(Dr. ingeniøravhandling, 0809-103X; 2003:85, Doctoral thesis, 2003)Impact between the water and ship, i.e. slamming can cause important global and local effects. A numerical method has been applied to predict water entry loads on three-dimensional bodies. When the local angle between the ... -
Blue-Chip or Sub-Standard?: A data interrogation approach to identify safety characteristics of shipping organisations
(Doktoravhandlinger ved NTNU, 1503-8181; 2004:8, Doctoral thesis, 2004) The objective of this thesis describes the characteristics that distinguish shipping companies that have a superior safety standard, called blue-chip, from those being substandard. The different characteristics of ... -
Numerical Methods for Flows with Evolving Interfaces
(Doktoravhandlinger ved NTNU, 1503-8181; 2004:12, Doctoral thesis, 2004)The present thesis addressed two important aspects of Computational Hydrodynamics: solution methods for following evolving interfaces, and stabilisation techniques for finite element method sin the context of convection-dominated, ... -
Numerical Simulation of Three-dimensional Viscous Flow around Marine Structures
(Doktoravhandlinger ved NTNU, 1503-8181; 2005:170, Doctoral thesis, 2005)The first part of the thesis covers the theoretical background for computational fluid dynamics; specifically, the incompressible Navier-Stokes equations. Some general solution methods are reviewed, as well as the most ... -
Fiskebåten som fremtidig arbeidsplass - Sluttrapport fra 3-årig tverrfaglig forskningsprosjekt rettet mot sikkerhet og arbeidsforholdene i ulike fartøy- og flåtegrupper
(SINTEF Rapport;, Research report, 2005)Personulykkesstatistikken viser at fiskeriet fortsatt må regnes som et av de mest risikofylte yrker i Norge. Det er i dette prosjektet spesielt gjort undersøkelser knyttet til arbeidsoperasjoner i fiskeflåten som er ... -
Control of Marine Propellers: from Normal to Extreme Conditions
(Doktoravhandlinger ved NTNU, 1503-8181; 2006:187, Doctoral thesis, 2006)This is a thesis about control of marine propellers. All ships and underwater vehicles, as well as an increasing number of offshore exploration and exploitation vessels, are controlled by proper action of their propulsion ... -
Modeling and Control of Trawl Systems
(Doktoravhandlinger ved NTNU, 1503-8181; 2006:131, Doctoral thesis, 2006)This thesis is motivated by the possible benefits of a more precise trawl control system with respect to both environmental impact and fishing efficiency. It considers how the control performance of a pelagic trawl system ... -
Application of the CIP Method to Strongly Nonlinear Wave-Body Interaction Problems
(Doktoravhandlinger ved NTNU, 1503-8181; 2006:35, Doctoral thesis, 2006)Water entry and exit, green water on deck, sloshing in tanks and capsizing in intact and damaged conditions are examples on violent fluid motion. The combination of model tests, theoretical analysis and Computational Fluid ... -
A Boundary Element Method Applied to Strongly Nonlinear Wave-Body Interaction Problems
(Doktoravhandlinger ved NTNU, 1503-8181; 2007:141, Doctoral thesis, 2007)A two-dimensional Boundary Element Method (BEM) based on potential flow theory is developed to study wave-body interaction problems with strongly nonlinear effects. In particular, the following problems are studied. One ... -
Modelling of flexible slender systems for real-time simulation and control applications
(Doktoravhandlinger ved NTNU, 1503-8181; 2007:222, Doctoral thesis, 2007)The main contributions in the present thesis are the development of two mathematical models describing the motion and forces in slender mechanical systems like cables. The main advantage by the models proposed is the ... -
An Experimental Investigation of In-line and Combined In-line and Cross-flow Vortex Induced Vibrations
(Doktoravhandlinger ved NTNU, 1503-8181; 2007:253, Doctoral thesis, 2007)This thesis presents results from an experimental investigation of hydrodynamic forces on a cylinder under prescribed harmonic motions in uniform flow. The purpose of the experiments has been to find hydrodynamic coefficients ... -
Modeling and Control of Top Tensioned Risers
(Doktoravhandlinger ved NTNU, 1503-8181; 2007:183, Doctoral thesis, 2007)This doctoral thesis presents new research results on the control of top tensioned risers in deep waters. The main motivation for this work is the development of a riser control system which control the top tension of the ... -
Analysis of Ignition and Combustion in Otto Lean-Burn Engines with Prechambers
(Doktoravhandlinger ved NTNU, 1503-8181; 2008:160, Doctoral thesis, 2008)Otto-engines in which the combustion chamber has richer fuel/air mix close to the ignition source and leaner charge further away from the ignition source are often called "stratified charge engines". Stratified charge can ...