Blar i Institutt for marin teknikk på forfatter "Leira, Bernt"
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Assessment of wave power for sea states at different sites
Lothe, Marie (Master thesis, 2018)The aim of this thesis is to investigate available and captured wave power at five different locations on the Norwegian continental shelf; Haltenbanken, North Sea Center, Ekofisk, Utsira and Tromsøflaket. A literature ... -
Comparative Analysis of Offshore Riser Configurations
Hellberg, Axel (Master thesis, 2023)Oppgaven representerer en omfattende undersøkelse av ytelsen til tre forskjellige stigerørkonfigurasjoner: SCR, WDR og en SLWR. Hovedmålet med den statiske analysen var å avdekke de forskjellige egenskapene mellom SCR, ... -
Dynamic analysis and Optimisation of the 12MW WINDMOOR floating turbine
Lillebostad, Jon Inge (Master thesis, 2021)De siste årene har vindkraft til havs hatt en stor utvikling. Havarealene som er tilgjengelig for bunnfaste havvindturbiner er begrenset på grunn av dybde begrensingene. Derfor har flytende vindturbiner et potensial til å ... -
Evaluation of two Commercial Flow Simulation Tools for Modeling of Subsea Carbon Dioxide Injection Systems
Lien, Markus (Master thesis, 2023)En analyse av to kjente simuleringsverktøy for flerfasestrøm, LedaFlow (versjon 2.8.264.024) og OLGA (versjon 2020.2.0), ble utført for å simulere CO2-injeksjonssystemer og evaluere ytelsen til disse verktøyene. Målet var ... -
Fatigue reliability of offshore Mooring chains under influence of mean load and corrosion
Lone, Erling Neerland (Doctoral theses at NTNU;2023:196, Doctoral thesis, 2023)A number of full-scale fatigue tests have been conducted for offshore mooring chain in the last decade for both new and used chains, retrieved after operation in the North Sea. The surface condition of the used chains vary ... -
Long-Term Extreme Response Analysis of Marine Structures Using Inverse Reliability Methods
Giske, Finn-Idar Grøtta (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 ... -
Non-Linear Time Domain Analysis of Deepwater Riser Vortex-Induced Vibrations
Kim, Sangwoo (Doctoral theses at NTNU;2022:178, Doctoral thesis, 2022)Fatigue analysis of marine risers due to vortex-induced vibrations (VIV) is normally based on semi-empirical frequency domain methods which only allow for linear structural models, excluding non-linear effects (e.g., tension ... -
Onboard Tuning and Uncertainty Estimation of Vessel Seakeeping Model Parameters
Han, Xu (Doctoral theses at NTNU;2021:356, Doctoral thesis, 2021)The accurate prediction of critical vessel motions is essential for safe and cost-efficient marine operations. Compared with the difference-frequency responses that can be compensated by mooring and dynamic positioning ... -
Probabilistic Modelling of Icedrift and Ice Loading on Fixed and Floating Offshore Structures
Sinsabvarodom, Chana (Doctoral theses at NTNU;2023:29, Doctoral thesis, 2023) -
Relative Motion Calculator
Berg, Eirik (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 ... -
Stochastic dynamic analysis and reliability evaluation of the roll motion for ships in random seas
Chai, Wei (Doctoral thesis at NTNU;2016:224, Doctoral thesis, 2016)Large amplitude roll motion in realistic seas is a serious threat to ship stability because it can lead to damage or even capsizing of the vessel. For the excessive roll motion in random seas, the nonlinear effects and ...