Blar i Department of Mechanical and Structural Engineering and Materials Science (TN-IMBM) på tittel
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Life extension of offshore structures : A conceptual framework and fatigue damage models
(PhD thesis UiS;, Doctoral thesis, 2019-09)Many offshore structures worldwide are approaching or have already exceeded their original design life. It is important to use the existing infrastructure efficiently and to estimate remaining service life accurately. ... -
Life Extension of Offshore System: A Framework for Optimization of Maintenance Needs and Operation Requirement W.R.T End Life Management Scenario
(Masteroppgave/UIS-TN-IMBM/2020;, Master thesis, 2020-02-01)In offshore production installations, numerous platforms, facilities, systems, and equipment’s are approaching or already exceeded their original design life. The industrial product is design for limited timespan and ... -
Life extension of ship-shaped floating production units
(Masteroppgave/UIS-TN-IMBM/2020;, Master thesis, 2020-06)In the last two decades, the number of floating, production, storage, and offloading units (FPSOs) deployed internationally has increased rapidly. Many of them are still young but have already started ageing. The objective ... -
Life Prediction for metals under multiaxial fatigue: A Review of existing multiaxial fatigue tests.
(Master thesis, 2022)An overview of multiaxial fatigue life prediction methodologies and tests is provided in the present paper. It is essential for engineering applications to accurately estimate the fatigue failure behaviour and fatigue life ... -
Life-Cycle Assessment of Buildings at Design Stage: Case Study
(Master thesis, 2021)A life-cycle assessment of project Langhus Gård, a residential building in Nordre Follo. The focus of the LCA is to compare timber and steel studs in outer walls, as well as providing guidelines for merge between BIM (Revit) ... -
LIFECYCLE MANAGEMENT OF OFFSHORE AND ONSHORE WIND FARMS
(Master thesis, 2023)Since the demand for renewable energy sources on a global scale has increased substantially over the past few years, a great number of businesses have made investments in this industry and are doing their utmost to make ... -
Lifetime Benefit Analysis of Intelligent Maintenance: Simulation Modeling Approach and Industrial Case Study
(Peer reviewed; Journal article, 2021-04)The introduction of Industry 4.0 is expected to revolutionize current maintenance practices by reaching new levels of predictive (detection, diagnosis, and prognosis processes) and prescriptive maintenance analytics. In ... -
Lifting analysis of integrated spool cover
(Masteroppgave/UIS-TN-IKM/2013;, Master thesis, 2013)Large competition in the offshore industry requires innovative solutions to satisfy the demand. A new concept of spool installations is considered where three large spools are lifted in an integrated protection structure ... -
Lifting/Installation analysis of spool - Comparison between brace and spreader solution from a structural, operational and economical point of view
(Masteroppgave/UIS-TN-IKM/2011;, Master thesis, 2011)As large sections of production pipe are lifted and installed, forces act on the structure. If initial analyses of the structural integrity show that the pipe will fail, support elements have to be introduced. The two most ... -
Limit cycle oscillations at resonances
(Journal article; Peer reviewed, 2017)This paper deals with limit cycles in one degree of freedom systems. The van der Pol equation is an example of an equation describing systems with clear limit cycles in the phase space (displacement-velocity 2 dimensional ... -
Limitations related to marine operations in the Barents Sea
(Journal article; Peer reviewed, 2017)Some marine activities in the Barents Sea are normally ongoing year-round; others are dependent on limited weather windows. The limitations for the marine operations are the special weather conditions characterized by ... -
Limiting operational wave criterion for spool installation lift - with emphasis on analysis and wind-wave modeling
(Masteroppgave/UIS-TN-IKM/2015;, Master thesis, 2015-06-15)Spools are rigid pipe sections which are parts of the infrastructure for transporting produced hydrocarbons and injection fluids subsea. Installing them includes a subsea lifting operation commonly carried out by use of ... -
Linear and nonlinear analyses of Røydalen bridge
(Master thesis, 2021)The aim of this thesis is to gain a broader understanding of bridge modeling and nonlinear analyses of structures. Røydalen bridge has been chosen as a case study and the modeling and analyses of the bridge has been performed ... -
Linear quadratic regulator optimal control of two-rotor wind turbine mounted on spar-type floating platform
(Peer reviewed; Journal article, 2022)Interest is steadily growing for multi-rotor wind turbine concepts. This type of wind turbine offers a practical solution for scaling issues of large wind turbine components and for the reduction of costs associated with ... -
Literature Review on Repair methods for Damaged Offshore Joints
(Master thesis, 2021)Offshore structures subject to severe environmental loading may exhibit fatigue damage over time. In particular, fatigue cracks are a significant concern in welded components. Previous work has been published regarding the ... -
Literature Review on Thermomechanical Modelling and Analysis of Residual Stress Effects in Wire Arc Additive Manufacturing
(Peer reviewed; Journal article, 2023-03)The wire arc additive manufacturing (WAAM) process is a 3D metal-printing technique that builds components by depositing beads of molten metal wire pool in a layer-by-layer style. Even though manufactured parts commonly ... -
Literature review on thin-walled and cellular structure designs for energy absorption
(Peer reviewed; Journal article, 2023)Bio-inspired structure is a topic of immense interest to researchers worldwide. In order to maximize energy absorption through biomimetic structures, this article presents bio-inspired structure particularly, thin walled ... -
Livssyklusanalyse av bygninger ved bruk av BIM: En case-studie
(Master thesis, 2021)A large proportion of the total emission from the building and construction industry are related to the production of building materials. In buildings with low energy needs, building materials make up a large percentage ... -
Load analysis on an offshore wind turbine structure
(Masteroppgave/UIS-TN-IKM/2012;, Master thesis, 2012)This report is written as documentation of a master thesis in the course constructions and materials at the University of Stavanger. The thesis was performed within January to June 2012 as a further research on an international ... -
Load capacity and structural response of CLT-concrete composite slabs with two different types of shear fasteners
(Master thesis, 2021)Abstract The subject of this Master thesis is to investigate the performance of the behaviour of Cross Laminated Timber-concrete composite slabs with two different types of shear fasteners by performing theoretical predictions ...