Blar i Institutt for marin teknikk på tittel
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Fatigue crack growth in mooring chain steel at different mean load levels
(Peer reviewed; Journal article, 2023)The fatigue crack growth rates of R4 mooring chain steel at different R-ratios are investigated. Crack growth experiments are performed at three different R-ratios, 0.1, 0.3 and 0.7, utilizing compact tension specimens in ... -
Fatigue Crack Rrowth Simulation Using xEtended Finite Element Method
(Master thesis, 2013)Fatigue crack growth analysis of offshore structure is concerned by the industry because it?s economical and practical to increasing the usage life of the strucutre by extend it?s fatigue life. S-N approachs are the most ... -
Fatigue Damage Comparison of Mechanical Components in a Land-based and a Spar Floating Wind Turbine
(Journal article; Peer reviewed, 2015)This paper investigates the fatigue damage of the gears and bearings in a land-based and a spar-type floating wind turbine. The reference 5 MW NOWITECH gearbox is used on a land-based and a floating spar wind turbine. ... -
Fatigue Design Appropriations for Floating Offshore Wind Turbine Support Structures
(Master thesis, 2023)Flytende havvindturbiner (FOWT) utvikles for å utvide vindkraftproduksjonen til områder langt fra kysten og i dypere farvann. Ved å bruke erfaringen fra olje- og gassindustrien innen offshorestrukturer, kan FOWT-design dra ... -
Fatigue design sensitivities of large monopile offshore wind turbines
(Peer reviewed; Journal article, 2022)The input for fatigue analyses of offshore wind turbines is typically chosen based on design values provided by design standards. While this provides a straightforward design methodology, the contribution of different input ... -
Fatigue Estimation of Offshore Structure by Monitored Data and Machine Learning
(Master thesis, 2022)Som en konsekvens av at et økende antall offshore-plattformer passerer sin initielt tiltenkte levetid, er utmattingssvikt ansvarlig for et betydelig antall reparasjoner i Nordsjøen. I løpet av de siste årene har ... -
Fatigue in Jacket Structures With Impaired Integrity
(Master thesis, 2012)Present regulations for offshore structures on the Norwegian continental shelf havea requirement for Accidental Limit State redundancy and Fatigue Limit State redundancyin a damaged state. However, the requirement is far ... -
Fatigue life estimates based on unit load approach
(Master thesis, 2015) -
Fatigue Lifetime Assessment of Typical Longitudinal/End Connections for Large Offshore Service Construction Vessels (OSCVs). - Application of Finite Element Method Software and Rule Loads
(Master thesis, 2015)In the last decades there has a major development of the Offshore Service Construction Vessels (OSCV) where high tensile steel has been introduced to increase the dead weight, but also to increase the allowable stress ... -
Fatigue Loads on Large Diameter Monopile Foundations of Offshore Wind Turbines
(Master thesis, 2014)The objective of this master thesis is to investigate the fatigue loading on an offshore wind turbine located in a waterdepth of 45 m. Offshore wind turbines are especially prone to fatigue due to variable environmental ... -
Fatigue loads on large diameter offshore wind monopile foundations in non-operational situations
(Master thesis, 2016)The objective of this master thesis is to perform fatigue analysis on a large diameter offshore wind turbine with monopile foundation in non-operational situations. Offshore wind turbines are fatigue dominated structures, ... -
Fatigue Monitoring of Crane Foundations
(Master thesis, 2023)Denne avhandlingen fokuserer på evaluering av utmattingsskader på sveisede flenser på kranfundamenter på servicefartøy som brukes i operasjoner i oppdrettsnæringen langs norskekysten. Målet med studien er å undersøke ... -
Fatigue of a composite rigid wing sail designed for the shipping industry
(Master thesis, 2021) -
Fatigue of Dynamic Power Cables Applied in Offshore Wind Farms
(Master thesis, 2019)De siste årene har utviklingen innenfor offshore vind teknologi vært at installasjonene plasseres lenger unna kysten med dypere vann. De dynamiske kraftkablene som leverer strømmen fra installasjonene er viktige komponenter ... -
Fatigue of Flexible Riser in Bend Stiffner Area
(Master thesis, 2011)The development of offshore fields has reached large water depths, and hence more challenges are met in design of offshore systems. The large water depths challenge the designer in terms of high temperature and pressure ... -
Fatigue of Flexible Risers Considering Alternative Constitutive Models
(Master thesis, 2014)The flexible riser is made up of both polymeric layers and steel layers, including steel tendons. Due to internal pressure and tension of the pipe, the tendons act with a normal force on the layer underneath. In the beginning ... -
Fatigue of Pipelines resting on Uneven Seabed
(Master thesis, 2011)Subsea pipelines represent the most cost effective way of transporting oil and gas from the subsea field to the market. A large network of subsea pipelines has therefore been installed both at the Norwegian continental ... -
Fatigue Performance of Copper Power conductors
(Doctoral thesis at NTNU;2015:148, Doctoral thesis, 2015)The present work is concerned with the fatigue strength of copper power conductors applied in umbilicals and power cables. Two cross-sections of conductors were investigated, namely, 95 mm2 and 300 mm2. The work included ... -
Fatigue prediction models of Dynamic Power Cables by laboratory testing and FE analysis
(Master thesis, 2020)Floating wind turbines are becoming more popular and is likely to be a major source of energy in the future. These floating turbines relies on dynamic subsea power cables for the transportation of electricity ... -
Fatigue reliability assessment of offshore wind turbines with stochastic availability
(Journal article; Peer reviewed, 2019)In this paper, the impact on lifetime estimation of an offshore wind turbine by introducing a stochastic model for the availability is investigated. Offshore bottom-fixed wind turbines typically have an average downtime ...