Blar i Institutt for marin teknikk på utgivelsesdato
Viser treff 341-360 av 3421
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Wave loads on decks of offshore structures in random seas
(Doktoravhandlinger ved NTNU, 1503-8181; 2012:163, Doctoral thesis, 2012) -
High Energy Ship Collisions With Bottom Supported Offshore Wind Turbines
(Master thesis, 2012)As the worlds demand for energy is increasing mostly due to the increase in population, and coal, oil and gas deposits are limited, it is desirable to gather energy from renewable energy sources. Wind energy is a form of ... -
Ice-Induced Loads on Ship Hulls
(Master thesis, 2012)The calculation of ice-induced loads on ships is still mainly based on empirical models. In order to gain a better physical understanding of the loading on ice-going vessels, Det Norske Veritas launched an ice load monitoring ... -
Sikker kommunikasjon om bord. En studie av omfang, rekruttering, språk, kommunikasjon og sikkerhet med fokus på utenlandsk arbeidskraft i norsk fiskeflåte
(Research report, 2012)Rapporten presenterer resultater fra en studie som omhandler utenlandsk arbeidskraft i den norske fiskeflåte. Målet for studien var å kartlegge omfang og potensielle sikkerhetsutfordringer knyttet til språk og kommunikasjon. ... -
Particulate matter emission characteristics from diesel engines operating on conventional and alternative marine fuels
(Doktoravhandlinger ved NTNU, 1503-8181; 2012:341, Doctoral thesis, 2012)The awareness of adverse health effects associated with diesel aerosol emissions has generated a great public and academic interest in studying various aerosol-producing sources. While automotive industry has achieved ... -
Risk and resilience in global maritime supply chains
(Doktoravhandlinger ved NTNU, 1503-8181; 2012:107, Doctoral thesis, 2012)Why did they make birds so delicate and fine as those sea swallows when the ocean can be so cruel? She is kind and very beautiful. But she can be so cruel and it comes so suddenly and such birds that fly, dipping and ... -
Analysis on Shift of Nature Modes of Liquid Sloshing in a 3D Tank Subjected to Oblique Horizontal Ground Motions with Damping Devices
(Journal article; Peer reviewed, 2013)The extended study of Wu et al. (2012) of sloshing fluid in tanks with internal structures from 2D to 3D is presented in the paper. The phenomenon of liquid sloshing in a 3D tank with various damping devices is solved by ... -
Long-term Analysis of Gear Loads in Fixed Offshore Wind Turbines Considering Ultimate Operational Loadings
(Journal article; Peer reviewed, 2013)The long-term extreme value analysis of gear transmitted load due to the main shaft torque is presented. Two methods, the multibody simulations (MBS) and a simplified method, are demonstrated for the gear transmitted load ... -
Large Eddy Simulations of Flow around a Circular Cylinder in the Vicinity of a Wall at Reynold Number of 13100
(Chapter, 2013)The flow around a circular cylinder in the vicinity of a rigid wall at Reynolds number 13100 is simulated using Large Eddy Simulations (LES) with Smagorinsky subgrid scale model. The main purpose of the present work is to ... -
Fatigue Analysis of Mooring Lines on the Floating Wind Turbine Hywind Demo
(Master thesis, 2013)In the last decades the focus on developing renewable energy has increased tremendously. The main reason for this is the rapid increase of population, which requires enormous amounts of energy. Eventually we will run out ... -
Weight Margins and Flexibility in Offshore Rigs
(Master thesis, 2013)The subject of this paper is the use of weight margins in the design and fabrication of large offshore oilrigs. Margins are a way of increasing the freedom of choice of the designers and a method of increasing the overall ... -
Conceptual design, numerical and experimental investigation of a SPM cage concept for offshore mariculture
(Doktoravhandlinger ved NTNU, 1503-8181; 2013:260, Doctoral thesis, 2013)Offshore mariculture is gaining more attention as expansion of the nearshore aquaculture, led by increasing demand for food fish, is faced with stiff resistance from other nearshore stakeholders, including the environmentalists. ... -
The Efficiency of a Mewis Duct in Waves
(Master thesis, 2013)In this thesis, the efficiency of a Mewis Duct in waves has been investigated with the use of model tests in the large towing tank at MARINTEK in Trondheim. A ?load-varying? self-propulsion method was used, allowing for ... -
Numerical Study of Parametric Roll on a Fishing Vessel
(Chapter; Peer reviewed, 2013)Present research activity examines numerically the occurrence of parametric roll on a fishing vessel interacting with regular head-sea waves. The adopted solver is an efficient 3-D numerical Domain-Decomposition strategy ... -
Risk of collision between service vessels and offshore wind turbines
(Journal article; Peer reviewed, 2013)Offshore wind farms are growing in size and are situated farther and farther away from shore. The demand for service visits to transfer personnel and equipment to the wind turbines is increasing, and safe operation of the ... -
Comparison of efficiency of pushing and pulling thrusters
(Master thesis, 2013)In this thesis the effect of thruster drive mode (pulling, pushing and pushing with duct) on the propeller design was investigated by the means of systematic calculations in a numerical calculating software (AKPA). It was ... -
Design storm analysis simplification study for flexlay installation systems
(Master thesis, 2013)When doing installation analysis of flexible pipe systems one has to do dynamical analysis. The goal of said analysis is to find the limiting sea states that various operations or installations can take place in. To do ... -
Simulation of drilling riser disconnection - Recoil analysis
(Master thesis, 2013)The emergency disconnection system and recoil analysis is required for every offshore drilling unit. Situations can occur where the vessel needs to disconnect from the well, it can be to large forces that are being transferred ... -
Fatigue Analysis of Flexible Riser - Effect of Mean Stress Correction Procedures
(Master thesis, 2013)As the critical part of the oil product system, flexible riser?s fatigue life during the normal operating service is more and more significant. Finding the most dangerous point in the flexible riser and using the accurate ...