Browsing Institutt for marin teknikk by Title
Now showing items 1898-1917 of 3472
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Load and response analysis of wind turbines under atmospheric icing and controller system faults with emphasis on spar type floating wind turbine
(Doktoravhandlinger ved NTNU, 1503-8181; 2013:192, Doctoral thesis, 2013)Deep water offshore wind is a vast, reliable and economical energy source. Floating offshore wind turbines are potential systems to capture this energy which need to be analysed and designed in order to achieve economic ... -
Load and Response Calculation from Breaking Wave Impacts on Columns of Semisubmersible Platforms
(Master thesis, 2017)Marine structures are subjected to slamming loads during their operating life. Increasing concerns are raised regarding the calculations of extreme loading caused by breaking waves. Slamming loads are associated with ... -
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 ... -
Load Control for Real-time Hybrid Model Testing using Cable-Driven Parallel Robots
(Doctoral theses at NTNU;2021:284, Doctoral thesis, 2021)Real-time hybrid model testing (ReaTHM testing) is a method for emulating ocean structures that combines numerical methods with traditional hydrodynamic model testing. This is done by partitioning the ocean structure under ... -
Load Frequency-Based Power Management for Shipboard DC Hybrid Power Systems
(Peer reviewed; Journal article, 2020)The development of marine integrated power systems has enabled all-electric ship, with electric propulsion systems to be powered from diesel-generators. In addition, vessels with DC hybrid power sources such as fuel cell, ... -
Load transfer from coupled analysis to structural design of FWTs
(Master thesis, 2022)It is of research interest to establish a technique to capture the loads on the structural members of the offshore wind turbine when they are exposed to simultaneous wind and wave action. Unlike other floating offshore ... -
Loading and blade deflection of a tidal turbine in waves
(Journal article; Peer reviewed, 2019)A coupled numerical model has been developed and validated to study the fluid–structural interaction responses of a three-bladed tidal turbine in aligned waves and current. The unsteady blade element momentum (BEM) theory ... -
Loads on the Gravity-net-cage from Waves and Currents
(Master thesis, 2014)Due to limited space close to shore and environmental concerns, the trend has become to move the fish farms to more exposed areas. This motivates the study of loads on the fish farm in more energetic currents and waves.In ... -
Local and Global Properties of the Harmonic Polynomial Cell Method: In-depth Analysis in Two Dimensions
(Journal article, 2017)A detailed and systematic analysis is performed on the local and global properties of the recently developed Harmonic Polynomial Cell (HPC) method, a very accurate and efficient field solver for problems governed by the ... -
Local and global responses of a floating bridge under ship-girder collisions
(Journal article; Peer reviewed, 2018)The Norwegian Public Roads Administration is running a project “Ferry Free Coastal Route E39” to replace existing ferry crossings by bridges across eight fjords in western Norway. Since most of the fjords are wide and deep, ... -
Local Structural Analysis of a Semi-Submersible Exposed to Ice Loads
(Master thesis, 2015)The subject of deep sea drilling in the Arctic is now more relevant than ever. The environment in Arctic offshore areas can be extremely harsh and the structures operating there will have to be designed accordingly. In ... -
Localisation of Submarine Power Cables by Magnetometers on REMUS 100 AUV
(Master thesis, 2017)Power cables that are exposed to the marine environment are prone to damage, especially if they are located close to, or above, the seabed. Underwater surveys are carried out to ensure that cables are buried and inspect ... -
Localized corrosion damage prediction of steel plates in marine applications using quadrilateral inverse-shell elements based on iFEM
(Chapter, 2022)This research effort focuses on a damage detection strategy for identifying pitting corrosion locations in corroded marine structures using numerical approaches. To this end, a four-node quadrilateral inverse shell element ... -
Logistic management of production chemicals: A simulation Study
(Master thesis, 2011)This paper evaluates the logistics for production chemicals used on the offshore installations of the coast of Norway. Statoil provided the following problem description: There are an increasing number of fields on the ... -
Logistikkløsning for offshore oppdrettsanlegg
(Master thesis, 2012)Denne rapporten viser noen logistikkløsninger for offshore oppdrettsanlegg, og sammenligne de med dagens praksis. Bakgrunnen for oppgaven er de siste 20 årenes kontinuerlige stigning i volum av oppdrettslaks, en utvikling ... -
Long Term Analysis of Semi Submersible Offset
(Master thesis, 2016)The objective of this master's thesis is to perform a long term analysis of a non-linear response problem using the Peak Over Threshold (POT) method. Offset of a semi submersible was selected as suitable response problem ... -
Long Term Scheduling of Major Renewals: Systematic Approach and Financial Applications
(Master thesis, 2014)Much of the oil and gas installations in the North Sea originate from the booming 80s and 90s, and operators are facing considerable challenges in the managementof their ageing assets. Harsh environments combined with ... -
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 ... -
Long-term extreme response analysis of a long-span pontoon bridge
(Journal article; Peer reviewed, 2018)For the assessment of extreme load effects needed in design of marine structures, a full long-term analysis is recognized as the most accurate approach. However, due to the very large number of structural response analyses ... -
Long-Term Extreme Response Analysis of Marine Structures Using Inverse Reliability Methods
(Doctoral theses at NTNU;2017:298, Doctoral thesis, 2017)For the assessment of extreme responses needed in design of marine structures, a full long-term analysis is recognized as the most accurate approach. However, due to the very large number of structural response analyses ...