Browsing Institutt for marin teknikk by Issue Date
Now showing items 361-380 of 3421
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Combined Risk Indicator for Major Accident Precursors and Barriers in the Trends in Risk Level Project
(Master thesis, 2013)Since the ?trends in risk level? project first was started, the weights used to estimate the risk level on the Norwegian Continental Shelf has more or less been the same; five sets of generic weights, one for each type of ... -
Dynamic analysis of floating wind turbines during pitch actuator fault, grid loss, and shutdown
(Journal article; Peer reviewed, 2013)Coupled non-linear aero-hydro-servo-elastic simulations of three types of floating wind turbines (spar, semi- submersible, and tension leg platform) are carried out for several fault cases over a range of environmental ... -
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 ... -
Experimental and Numerical Investigation of Speed Loss due to Seakeeping and Maneuvering
(Doktoravhandlinger ved NTNU, 1503-8181; 2013:193, Doctoral thesis, 2013)Accurate prediction of the real voyaging speed for ocean‐going vessels in the actual weather condition is important for the expanding shipping industry. Ship owners are always aiming at achieving the highest profit, so ... -
Optimization models for reducing air emissions from ships
(Doktoravhandlinger ved NTNU, 1503-8181; 2013:169, Doctoral thesis, 2013)This research deals with the reduction of air emissions from ships. Ships are large contributors to air pollution with implications for climate change and human health. Regulations have entered into force or will in the ... -
Technical condition indexes for auxiliary marine diesel engines
(Doktoravhandlinger ved NTNU, 1503-8181; 2013:108, Doctoral thesis, 2013)Knowledge about the technical condition of a ship is an important issue. It will help in improving the planning of the maintenance actions, and giving earlier alerts to the organization if there is any development that ... -
Emergency preparedness in Arctic oil and gas exploration
(Master thesis, 2013)Due to an increasing interest in oil and gas exploration in the Barents Sea, it is important to identify all the challenges related to petroleum activity in that area. The objective of this thesis is to examine conditions ... -
Modelling and Analysis of a Cylindrical Flare Tower
(Master thesis, 2013)The study of a cylindrical flare tower concept proves that this novel flaretower design has great potential and could be a competetor to traditionaltruss-work flare towers. A design capable of withstanding wind and sealoads ... -
Prediction of extreme loads and fatigue damage for a ship hull due to ice action
(Doktoravhandlinger ved NTNU, 1503-8181; 2013:77, Doctoral thesis, 2013)Knowledge about statistical behavior of local ice loads on ship hulls is valuable for the purpose of safe voyage in ice-covered waters, both for short and long term time horizons. Based on the loads that are measured, e.g. ... -
An Environmental Life Cycle Assessment of LNG and HFO as Marine Fuels
(Master thesis, 2013)The maritime transportation industry will face harder requirements from the international community when it comes to environmental issues. The introduction of Emission Control Areas (ECAs) has forced shipowners to rethink ... -
The influence of ice classification on design of an offshore supply vessel
(Master thesis, 2013)It is estimated that 22% of the worlds remaining petroleum resources are located in the Arctic region and 88% are located offshore. To produce these resources is it needed with equipment that can handle the environmental ... -
Application of Steel Sandwich Panels in Offshore Vessels
(Master thesis, 2013)The work has been carried out with focus on a ship yards point of view. Application of sandwich panels in offshore vessels is has for several reasons not had the same development as for other ship types. In this thesis, ... -
Fatigue Analysis of Flexible Risers: A comparative study of different models for metal fatigue in flexible risers
(Master thesis, 2013)This thesis used different methods to model and predict the fatiguefrom wave loads on the tensile armor layers in a flexible riser in thebending stiffener area. The additional aim of the thesis was to givethe reader an ... -
Menneskelige faktorer og rømming fra lakseoppdrettsanlegg Årsaksanalyser med fokus på menneskets rolle
(Research report, 2013)Rapporten presenterer resultater fra en studie av årsaker til rømming i fiskeoppdrett. Målet for studien var å identifisere årsaker til kjente rømmingsulykker med fokus på menneskets rolle i hendelsesforløpet. Intervjuer ... -
Uttak av slakteklar fisk fra sfæriske merder
(Master thesis, 2013)SammendragUtgangspunktet for denne oppgaven er sfæriske merder, og at det må utvikles metoder for hvordan uttak av fisk fra disse skal gjennomføres før de kan tas i bruk. Det vil være flere grunner for å ta en slik type ... -
Optimization of a Deck Structure due to Modularization of Cabins
(Master thesis, 2013)This thesis presents an optimization approach for design of a deck structure that enables modularization of cabins in superstructures of offshore support vessels. The methodology has been based on a superstructure designed ... -
Flytebro med nytt forankringssystem
(Master thesis, 2013)Hensikten med denne oppgaven er å evaluere et nytt flytebro konsept for Sognefjor- den. Flere grunnleggende design har vist seg å være hensiktsmessige og gjennom- førbare, og konseptet med forankret kunstig sjøbunn inkludert ... -
3D Domain Decomposition for Violent Wave-Ship Interactions
(Journal article, 2013)A 3D Domain-Decomposition (DD) strategy has been developed to deal with violent wave-ship interactions involving water-on-deck and slamming occurrence. It couples a linear potential flow seakeeping solver with a Navier–Stokes ... -
Analysis of Ice-Induced Vibrations and Comparison with Full-Scale Experimental Data
(Master thesis, 2013)In the present work, a model which estimates the fatigue life for a cylindrical structure interacting with ice is developed. The model is based on the lighthouse of Norströmsgrund, and estimates the fatigue damage for one ... -
The influence of using a ducted propeller on motions and speed loss of a ship in waves
(Master thesis, 2013)Comparisons of experimental and numerical investigations into the effect of duct on motion variables and speed loss for a given ship model are presented. The purpose of these comparisons is to verify the advantage of using ...