Browsing Institutt for marin teknikk by Title
Now showing items 1916-1935 of 3472
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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 ... -
Long-term extreme response analysis of marine structures using inverse SORM
(Chapter; Peer reviewed, 2017)In this paper the first order reliability method (FORM) found in connection with structural reliability analysis is first used in an inverse manner to efficiently obtain an approximate solution of the full long-term extreme ... -
Long-term extreme response and reliability of a vessel rolling in random beam seas
(Journal article; Peer reviewed, 2018)In this paper, the long-term extreme response of a vessel rolling in random beam seas and the associated reliability evaluation are addressed. The long-term response analysis is based on the upcrossing rates of the roll ... -
Long-Term Fatigue Damage Sensitivity to Wave Directionality in Extra Large Monopile Foundations
(Journal article, 2017)The fatigue damage sensitivity to wave directionality on large-diameter monopile foundations for use in the offshore wind turbine industry is investigated. A frequency domain approach with the Dirlik method is used for a ... -
Long-term joint distribution of environmental conditions in a Norwegian fjord for design of floating bridges
(Journal article; Peer reviewed, 2019)A floating bridge is an attractive solution for crossing wide and deep fjords. To design a reliable and cost-effective floating bridge, it is very important to accurately evaluate the long-term environmental conditions at ... -
Long-term Response Analysis of Wind Turbines with an Emphasis on Fault and Shutdown Conditions
(Doctoral thesis at NTNU;2014:266, Doctoral thesis, 2014)Wind turbines are exposed to a variety of load conditions during their 20-year service life. After installation, every turbine experiences operational, shutdown, and parked conditions, and any of these conditions might ... -
Long-term stochastic extreme response analysis of floating bridges
(Journal article; Peer reviewed, 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 ... -
Long-Term Wave Power Statistics for Individual Waves
(Master thesis, 2012)Long-term statistics for wave power describes the waves that will occur over years and their energy. This can be found by putting together short-term statistics for individual waves and statistics from sea states. All the ... -
Looking with both eyes. Comments to Håkon Glørstad "Where are the Missing Boats? The Pioneer Settlement of Norway as Long-Term History"
(Journal article; Peer reviewed, 2013)Glørstad introduces his paper with a joke that ridicules searching for your keys in the illuminated areas only. After reading the paper one may wonder if he missed the point of his own joke. Anyway, it seems just as unwise ... -
Low Greenhouse GasEmission Ship
(Master thesis, 2010)The fleet consists of 6 LNG carriers where 3 have a loading capacity of 44 000 tons while the remaining 3 ships can lift 33 00 tons of LPG. Since the ships are set to operate at speeds between 14 and 20 knots it is necessary ... -
Low- and Zero-Emission Hybrid-Electric Power Systems for Passenger Ferries
(Master thesis, 2021)Den maritime industrien er blitt oppfordret til å redusere klimagassutslippene betydelig, med et mål om en reduksjon på 50% innen 2050 sammenliknet med 2008-nivåene. Dette har oppmuntret til utvikling av nye lav- og ... -
Low-Cost AUV for High Resolution Photogrammetry Data Acquisition
(Master thesis, 2019)I undervannsteknikk finnes det få løsninger for å gjøre undersøkelser innen fotogrammetri effektivt fra en godt egnet undervannsfarkost, spesielt til lav kostnad og med høy navigasjonsnøyaktighet. Fjernstyrte undervannsfarkoster ... -
Low-Cost Observer and Path-Following Adaptive Autopilot for Ships
(Master thesis, 2017)In this thesis a signal-based observer and a path-following autopilot design will be derived and implemented on the model vessel C/S Enterprise I. Using scaling methods the goal is to transfer the controllers into a full ... -
Low-frequency dynamic wake meandering: comparison of FAST.Farm and DIWA software tools
(Journal article; Peer reviewed, 2021)Most of the global dynamic response models used today for the design of wind turbines are based on the aero-hydro-servo-elastic analysis of one single turbine. However, research on bottom- fixed offshore wind turbines has ... -
Low-Frequency Hydrodynamic Modeling of a 12 MW Semi-Submersible Wind Turbine
(Master thesis, 2021)INO WINDMOOR-plattformen er en semi-submersible konstruksjon for å støtte en 12 MW vindturbin. Dens naturlige frekvenser i bølge og tonehøyde er under frekvensene til typisk bølgeenergi, og store resonansbevegelser kan ... -
Low-frequency oscillations in flow past an inclined prolate spheroid
(Journal article; Peer reviewed, 2019)We analyse the forces on a 45∘ inclined 6:1 prolate spheroid at Reynolds number ReD = 8000. In contrast to flow at lower Reynolds numbers previously investigated, we now find a strong oscillatory behaviour in the global ... -
Lowering and lifting operations through moonpools: Hydrodynamic investigations
(Master thesis, 2014)On construction vessels subsea modules, diving bells, cables and so on are often lifted through a moonpool. The advantage of using a moonpool is that the surface elevation inside the moonpool is shielded against the outside ... -
Lowering operation of a subsea module using air filled suction anchors to reduce the crane load capacity required.
(Master thesis, 2010)The Ormen Lange gas field is located 120 km west-north west of Kristiansund, and went in to production in October 2007. The field is planned to be developed throughout 2015 including the installation of a subsea compression ... -
M.o.T. Mobilmelker og Torsk
(Bachelor thesis, 2023)Dagens situasjon på ODE sitt gjennomstrømninganlegg for torsk på Stadsbygd gjennomføres røkting av fiskekar ved et hevertsystem. På grunn av lave strømningshastigheter i karene fører dette til oppsamling av partikler på ...