Browsing Institutt for marin teknikk by Issue Date
Now showing items 321-340 of 3421
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Time Domain Modeling and Analysis of Dynamic Gear Contact Force in a Wind Turbine Gearbox with Respect to Fatigue Assessment
(Journal article; Peer reviewed, 2012)The gearbox is one of the most expensive components of the wind turbine system. In order to refine the design and hence increase the long-term reliability, there has been increasing interest in utilizing time domain ... -
Comparative study on the dynamic response of a Spar type buoy and a Sevan type cylinder floating production unit
(Master thesis, 2012)Comparative study on the dynamic response of a Spar type buoy and a Sevan type cylinder floating production unit -
Numerical studies on wave forces and moored ship motions in intermediate and shallow water
(Doktoravhandlinger ved NTNU, 1503-8181; 2012:238, Doctoral thesis, 2012)Wave forces and motions of a moored ship in intermediate and shallow water depth are investigated numerically in the present thesis. The studies are carried out in the framework of potential flow theory. Three numerical ... -
Identification and Analysis of Full Scale Ventilation Events
(Journal article; Peer reviewed, 2012)The present paper deals with propeller ventilation in full scale. The paper is based on full scale monitoring data from an offshore supply ship during normal operation. The data was collected by the on-line monitoring ... -
Modelling of Ship Superstructure Icing: Application to Ice Bridge Simulators
(Master thesis, 2012)Increasing activities on high north regions bring about a demand of safety ship navigation. Under severe weather condition considerable amounts of ice may accumulate on marine structures. Ice bridge simulator is of importance ... -
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 ... -
Relative Motion Calculator
(Master thesis, 2012)AbstractThe wind power business has in recent times changed its focus from land-based installations to offshore installations. This has presented challenges both technological and financial, mainly related to construction ... -
Viscous Flow Around Finite Lenght Circular Cylinder
(Master thesis, 2012)Viscous flow around circular cylinders is a classical research topic in fluid dynamics with a vast amount of practical applications in the field of offshore marine technology. In the flow around cylinders of finite length, ... -
DESIGN AND ANALYSIS OF TENSION LEG ANCHOR SYSTEMS FOR FLOATING WINDMILLS
(Master thesis, 2012)Increasing demand for clean and effective energy production turns interests of the world on floating offshore wind technology. To establish floating wind farms, a wind turbine have to be mound on a floating structure. The ... -
Investigation of wave-induced nonlinear load effects in open ships considering hull girder vibrations in bending and torsion
(Doktoravhandlinger ved NTNU, 1503-8181; 2012:357, Doctoral thesis, 2012)For ships with open cross sections, such as container vessels, it is of primary importance to accurately estimate torsional moment (TM) and horizontal bending moment (HBM) as well as vertical load effects. In recent decades, ... -
Vortex Induced Vibrations of Marine Risers
(Master thesis, 2012)SummaryThis Master s Thesis goal is to present fundamental physical aspects of Vortex Induced Vibrations (VIV) of marine risers, and outline methods for suppression of VIV. Main emphasis has been given to the use of strakes, ... -
Development of an Oil Production Platform for Year-Round Operation in the Beaufort Sea
(Master thesis, 2012)Due to high expectancy of hydrocarbon resources in the Beaufort Sea itis seen as an important area for energy in the future. As the focus nowis shifting towards the deeper parts of the sea, there is a need for floatingproduction ... -
Estimation and Computation of Ice-Resistance for Ship Hulls
(Master thesis, 2012)The oil price continues to increase while oil companies search for oil in new areas. There is assumed that 25% of the world s hydrocarbons are located in the arctic area. Operating in these areas will be a huge challenge ... -
Strength Analysis Modelling of Flexible Umbilical Members for Marine Structures
(Journal article; Peer reviewed, 2012)This paper presents a 3-dimensional finite element formulation for predicting the behaviour of complex umbilical cross-sections exposed to loading from tension, torque, internal and external pressure including bending. ... -
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, ... -
Halvt nedsenkbar tørrtre plattform: Koblingen mellom det hydro-pneumatiske stigerørsstrekk-systemet, stigerørene og kjølen.
(Master thesis, 2012)Det hydro-pneumatiske strekksystemet til stigerørene virker som en passiv hivkompensator med en olje/gass-akkumulator for a utligne de relative bevegelsene mellom semien og stigerørene. Semiresponsen fører direkte til at ... -
An economic transport system of the next generation integrating the northern and southern passages
(Master thesis, 2012)The ice cap surrounding the Arctic Ocean has been significantly reduced during the last decades. As the ice continues to diminish the economic potential of the NSR is becoming stronger. However there are still challenges ... -
Numerical Simulation of Flow Around Remotely Operated Vehicle (ROV)
(Master thesis, 2012)Computational Fluid Dynamics (CFD) have been applied for numerical simulations of the flow around simplified shapes of a Remotely Operated Vehicle (ROV). The simulations have been carried out at Re = 850 000, which coincides ... -
Interrelationships of LNG cargo containment systems and machinery configurations on LNG carrier - design and operational factors with economic assessment
(Master thesis, 2012)The main objective of this project has been to design a ship for LNG trade between Port Moresby and Singapore, with a cargo capacity corresponding to a total freight work in the range of 1.000,000 - 800,000m3 annually. The ... -
Modeling and Simulation of Transient Performance and Emission of Diesel Engine: Pseudo Bond Graph Approach to Modelling the Thermodynamic Process
(Master thesis, 2012)Internal combustion engines have been very successful as power producers in the marineapplicaiton due to their simplicity of construction, high efficiency and long track of proven technology. However, as the environmental ...