Browsing Institutt for marin teknikk by Issue Date
Now showing items 641-660 of 3421
-
Numerical and experimental investigation of a hinged 5-body wave energy converter
(Doktoravhandlinger ved NTNU, 1503-8181; 2014:66, Doctoral thesis, 2014)This thesis deals with modeling and simulation of a hinged 5 body wave energy converter (WEC), including verification by comparison with experimental results. The WEC consists of a shallow draft cylindrical center floater ... -
Development of a Method for Weather Routing of Ships
(Master thesis, 2014)Weather routing is a method within ship routing that is used to avoid rough weather and to find the minimal fuel, time or cost route between ports. Several methods and different software exit and are available to the ship ... -
Comparison of Numerical Simulation and Model Test for Integrated Installation of GBS Wind Turbine: Sammenligning av numerisk simulering og modellforsøk for installering av GBS vindturbin
(Master thesis, 2014)Reinertsen has developed a new installation concept for the transportation and installation of a fully assembled gravity based foundation offshore wind turbine (GBS-OWT) by means of a support double barge (DB) and standard ... -
Dynamisk analyse av modul i bølgesonen: Parameter analyse
(Master thesis, 2014)De siste årene har marine operasjoner blitt planlagt basert på praktisk maritim erfaring. Denne praktiske tilnærmingen er fortsatt viktig, men med nye og stadig mer komplekse operasjoner utført på steder som er utsatt for ... -
Revised simulation model for a Very Large Crude Carrier (VLCC)
(Master thesis, 2014)In this thesis a simulation model for a Very Large Crude Carrier is revised. MARINTEK s software ShipX is used to develop, improve, test and validate a model for the case vessel KVLCC2. The Manoeuvring Plug-In (SIMAN, ... -
Using Epoch Era Analysis in the Design of the Next Generation Offshore Subsea Construction Vessels
(Master thesis, 2014)This thesis examines the plausibility of using Epoch-Era Analysis during conceptual design of the next generation offshore subsea construction vessel (OSCV). Spurred by high oil prices and a decreasing level of accessible ... -
Contractual and Economical Consequences of LNG Boil-Off Quality
(Master thesis, 2014)The gas evaporating from the Liquefied Natural Gas (LNG), usually called Boil-off Gas (BOG), has previously been out of focus regarding its composition and corresponding heating value. A concentration of the BOG has been ... -
Tilstandsbasert vedlikehold på tørrgasstetninger
(Master thesis, 2014)Tørrgasstetninger er mekaniske akseltetninger som er plassert på hver sin side av kompressorhuset for å hindre at gass lekker ut til omgivelsene. Tørrgasstetninger benytter gass som tetningsmedium. Gasslekkasje kontrolleres ... -
The Modelling of Suction Caisson Foundations for Multi-Footed Structures
(Master thesis, 2014)Suction caissons are a type of offshore foundation that allow for fast and noise-free installation and decommissioning of offshore structures. They have been used for 20 years in the oil and gas industry and are also ... -
Numerical assessment of a double-acting offshore vessel's performance in level ice with experimental comparison
(Journal article; Peer reviewed, 2014)In this paper a numerical model is used to investigate the level ice performance of a double-acting intervention vessel, and the results are compared with a limited set of experimental data. The icebreaking capability and ... -
Gear Contact Fatigue Reliability Analysis for Wind Turbines Under Stochastic Dynamic Conditions Considering Inspection and Repair
(Chapter; Peer reviewed, 2014)Reliability is one of the most important features of the wind turbine gearbox, especially in offshore wind turbines (OWTs). This paper describes a general way to perform gear contact fatigue reliability analysis for wind ... -
Comparison of Wave-induced Response of a TLP Wind Turbine Obtained by CFD Method and Potential Theory
(Chapter, 2014)A computational fluid dynamics (CFD) method has been verified and compared with potential theory approach to assess the hydrodynamic loads on a tension leg platform wind turbine (TLPWT). Floating wind turbines have the ... -
Life Cycle Assessment of Farmed Salmon, Comparing a Closed with an Open Sea Cage System
(Master thesis, 2014)Ole Jonny Nyhus, Marine Technology, Norwegian University of Science and Technology.Abstract of Master's Thesis, levert 8. juni, 2014:Life Cycle Assessment of Farmed Salmon, Comparing a Closed with an Open Sea Cage System.The ... -
Alternative methods of realizing the sea spectrum for time-domain simulations of marine structures in irregular seas
(Master thesis, 2014)For dynamically sensitive structures or marine structures subjected to large displacements the extreme response is often determined on the basis of short term time domain simulation of extreme sea states using the environmental ... -
3D visualization of autonomous underwater robots
(Master thesis, 2014)This thesis has an objective aimed to develop a functional real-time visualization of an underwater robot manipulator, and present the relevant theory and steps related to this system. Then the system should be prepared ... -
Hydroelastic slamming response in the evolution of a flip-through event during shallow-liquid sloshing
(Journal article; Peer reviewed, 2014)The evolution of a flip-through event [6] upon a vertical, deformable wall during shallow-water sloshing in a 2D tank is analyzed, with specific focus on the role of hydroelasticity. An aluminium plate, whose dimensions ... -
Load Charts Calculations for Offshore Pedestal Cranes by Motion Response Analysis
(Master thesis, 2014)In this Master's thesis the sea lift operation from a supply vessel onto a oil platform has been evaluated. Two models have been built and analysed with different input parameters, as well as compared with the current load ... -
Structural Load Analysis of a Wind Turbine under Pitch Actuator and Controller Faults
(Journal article; Peer reviewed, 2014)In this paper, we investigate the characteristics of a wind turbine under blade pitch angle and shaft speed sensor faults as well as pitch actuator faults. A land-based NREL 5MW variable speed pitch reg- ulated wind turbine ... -
Emission Reduction Technology and Cost Efficiency for Ships Operating on the Northern Sea Route - A Case Study
(Master thesis, 2014)The purpose of this thesis is to determine whether the Northern Sea Route (NSR) is a more cost effective alternative than the Suez Canal Route (SCR) between Asia and Europe, given an introduction of an Emission Control ... -
Non-linear Wave Loads on Offshore Wind Support Structure
(Master thesis, 2014)Offshore wind development is constrained by its high cost. One potential way to meet this challenge is to reduce the uncertainty in wave modeling and hydrodynamic loads calculation for offshore wind support structures ...