Blar i NTNU Open på forfatter "Leira, Bernt J."
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Analysis of fire loading and buckling response of an aluminium structural member in a ferry hull
Rindheim, Aina (Master thesis, 2020)I denne masteroppgaven har en metode for å analysere skrog konstruksjoner under forhøyet temperaturer blitt oppfunnet. Metoden baserer seg på ideen om at når en konstruksjon er oppvarmet, vil den ikke ha uniform ... -
Analysis of Mooring System for a Floating Production System
Keshavarz, Leila (Master thesis, 2011)Understanding the behavior of a mooring line that is connected to a Suezmax vessel is a crucial requirement for our industry. Thus, we should model and analyze such a mooring line under a variety of environmental conditions. ... -
Application of Advanced Methods for ILI Data Denoising and Reliability Assessment of Corroding Pipelines
Skrede, Sindre Olsen (Master thesis, 2020)Dette prosjektet har som mål å etablere metodar for dataprossesering og estimering av noverande og framtidig kapasitet av korroderande røyrledningar, basert på data frå in-line inspeksjonar (ILI) av gjennverande veggtjukkleik ... -
Comparing Measured Loads and Responses on a Top Tensioned Riser System with Results from Computer Modeling
Høyland, Hans Christian Lagerlind (Master thesis, 2022)This report considers loads on a subsea wellhead, with a focus on wellhead fatigue. The basis of the report is a drilling campaign committed by Equinor, from which Equinor has provided measurements of wellhead moment and ... -
A Critical Review of Constitutive Models Applied to Ice-Crushing Simulations
Mokhtari, Mojtaba; Leira, Bernt J. (Peer reviewed; Journal article, 2024)In marine engineering, understanding the compressive behaviour of ice is crucial for accurately modelling ice loads on ships and offshore structures in ice-prone waters. Over the past few decades, numerous studies have ... -
Ice loading on Semi-Submersible: Local Analysis of Structural Response
Nilsen, Mats (Master thesis, 2019)Interessen for Arktis ha vært økende de siste årene, og en økning i aktivitet i denne regionen en setettersom søken etter olje og gass fortsetter. Nye utfordinger oppstår siden miljøet i disse områdene er tøffe og ... -
Load and Response Analysis of a 10 MW SPAR Wind Turbine
Grasdalen Nymoen, Knut (Master thesis, 2023)Teknologi basert på fornybar energi har vekket betydelig interesse, og det er viktig å fortsette forskningen og utviklingen av disse teknologiene. Overgangen til fornybar energi er i gang, med ønsket om å fase ut fossile ... -
Modelling and Analysis of a Submerged Floating Tunnel for Crossing of the Sulafjord
Kvalheim, Thea Lefdal (Master thesis, 2022)Fergefri E39 skal binde sammen vestkysten av Norge ved å erstatte sju ferger med bruer og tunneller. De fleste fjordkryssningene kan krysses ved bruk av kjent teknologi, men det kreves nye innovative løsninger for de ... -
Reliability Analysis of Wake-induced Riser Collision
Fu, Ping (Doctoral theses at NTNU;2019:91, Doctoral thesis, 2019)Reliability-based design of a riser array requires accurate estimation of extremes of the stochastic relative motion process between pairs of risers in order to avoid collision. Hydrodynamic interference is considered to ... -
Sea State Limitations for the Deployment of Subsea Compression Station Modules
Roti, Ingvild (Master thesis, 2012)Deployment of a large box structure in many sea states has been investigated. Two deployment methods are compared; crane installation over the side and through moonpool installation. The structure is 12 [m] long, 6 [m] ... -
Stability Assessment of a Semisubmersible Floating Offshore Wind Turbine
Myhre, Ida Emilie (Master thesis, 2024)Den økende etterspørselen etter fornybar energi har ledet til større interesse for utvikling av flytende havvindturbiner. Havvindparker tilbyr muligheten til å utnytte omfattende områder med stabil vind, noe som gjør dem ... -
Subsurface towing of heavy module
Olsen, Torbjørn Aakerøy (Master thesis, 2011)The offshore industry is expanding, new contracts are offered all over the world and new oil fields are discovered deeper and further offshore. With this expansion follows great business opportunities for existing and new ... -
Transient dynamics of drilling riser during disconnect
Bratseth, Svein (Master thesis, 2011)Drilling of petroleum wells have traditionally be done by adjusting the mud weight to balance pressure of the well. A new method of controlling well pressure is called controlled mud cap drilling. The method uses high mud ... -
VORTEX-INDUCED MOTIONS (VIM) OF A SEMI-SUBMERSIBLE FLOATING OFFSHORE WIND TURBINE
Cano Bravo, Rosa Alexandra (Master thesis, 2024)Denne avhandlingen undersøker Vortex-Induced Motion (VIM)-fenomenet i semi-submersible flytende havvindmøller (FOWT), med spesielt fokus på 12 MW INO WINDMOOR-modellen. VIM, forårsaket av sykliske virvelshedningskrefter ...