Browsing PhD theses (TN-IKM / TN-IMBM) by Issue Date
Now showing items 1-20 of 35
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Dynamic behaviour of jackets exposed to wave-in-deck forces
(PhD thesis UiS;17, Doctoral thesis, 2005)During the last decade, wave-in-deck loading on fixed offshore structures has increasingly been acknowledged as an issue of concern to the offshore oil and gas industry. Being mainly an issue for existing structures, the ... -
Industrial Service Strategy : Development, Implementation and Execution
(PhD thesis UiS;19, Doctoral thesis, 2005)Increasingly, as markets become more competitive and globalized, industrial service providers are dependent on effective and efficient service strategies to achieve a certain level of customer satisfaction and ... -
Activity-based life-cycle cost analysis : design, operation and maintenance in Arctic environment
(PhD thesis UiS;134, Doctoral thesis, 2011-08-25)Currently the oil and gas exploration and production is moving north towards the Barents Sea on the northern coast of Norway, north of the Arctic Circle. This unfamiliar operational environment of the Arctic poses new ... -
Production Performance Analysis : Reliability, Maintainability and Operational Conditions
(PhD thesis UiS;144, Doctoral thesis, 2011-11-28)With the increasing demand for energy over recent decades, the Arctic region has become an interesting area for future exploration and development for the oil and gas industry. The Arctic region is known to have a harsh ... -
On wave-wind interactions and implications for offshore wind turbines
(PhD thesis UiS;235, Doctoral thesis, 2014-11-17) -
Aerodynamic loads on a wind turbine rotor in axial motion
(PhD thesis UiS;245, Doctoral thesis, 2015-03-13)This study investigates the unsteady aerodynamics of attached flow on a two-dimensional airfoil. The unsteady aerodynamics introduces aerodynamic damping of the offshore wind turbine structure and is thus important for ... -
Analysis and Management of Bottlenecks in Supply Networks : Towards a Structured Approach to Stabilization of Inbound Material Flow
(PhD thesis UiS;256, Doctoral thesis, 2015-06-11)Any organization whose business model is based on production relies, and is dependent, on providers of raw material which it transforms into products. Customers’ demand for products, and thus the producing firm’s demand ... -
Asset Integrity Management : Challenges, planning and implementations
(PhD thesis UiS;306, Doctoral thesis, 2016-08-23)The emergence of asset integrity management (ATM) in the petroleum industry has been encouraged by the demand for a safer and more sustainable workplace with respect to health, safety, environment, value generation and ... -
Wind-induced vibrations of a suspension bridge: A case study in full-scale
(PhD thesis UiS;326, Doctoral thesis, 2016-12-16)In 2013, the Norwegian government adopted an ambitious plan to cross the wide and deep-fjords of Western Norway and create a ferry-free coastal high- way route. This implies the construction of multiple long-span bridges ... -
Offshore Structures Exposed to Large Slamming Wave Loads
(PhD thesis UiS;, Doctoral thesis, 2017-12)In sloping shallow water regions, waves undergo different nonlinear transformations such as wave shoaling and breaking, due to the nonlinear wave interactions with the seabed. The forces from breaking waves are of concern ... -
Numerical Simulation and Customized DACM Based Design Optimization
(PhD thesis UiS;, Doctoral thesis, 2018)The diverse numerical modelling, analysis and simulation tools that have been developed and introduced to markets are intended to perform the virtual design and testing of products and systems without the construction of ... -
Mineral Replacements in Flooding Experiments Linked to Enhanced Oil Recovery in Chalk
(PhD thesis UiS;, Doctoral thesis, 2018-11)Seawater injection into chalk-reservoirs on the Norwegian Continental Shelf has increased the oil recovery and reduced seabed subsidence. In the researchfield of Improved Oil Recovery (IOR) the effects of injection of ... -
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. ... -
Load sequence effects and mixed-mode fatigue crack growth in offshore structures
(PhD thesis UiS;, Doctoral thesis, 2019-12)An increasing number of the offshore structures in the North Sea are being operated in a life extension phase, which means that their original design life has been exceeded. As the structures age, they are deteriorating, ... -
Safety and Emergency Response Associated with Cold Climate Marine Operations
(PhD thesis UiS;, Doctoral thesis, 2020)This dissertation is developed by GMC Maritime and the University of Stavanger and is part of the industrial PhD program at the Norwegian Research Council. The aim of the work is to identify the governing mechanisms ... -
Structural Integrity of Steel Bridges: Environment-Assisted Cracking
(PhD thesis UiS;, Doctoral thesis, 2020-04)Steel bridges are generally subjected to degradation due to corrosive environments. Uniform corrosion, pitting corrosion, crevice corrosion, intergranular corrosion, microbiologically influenced corrosion and environment-assisted ... -
Cracking Behavior of Reinforced Concrete Structures Subjected to Service Load: Experimental and Numerical Investigation
(PhD thesis UiS;, Doctoral thesis, 2021-10)Cracks in reinforced concrete (RC) structures are controlled to enhance the service life, for a better aesthetic appearance, and to avoid leakages in liquid retaining structures. The most widely used crack controlling ... -
Fuel Cell Powered Drone: Use of Fuel Cells to Extend Multirotor Drone Endurance
(PhD thesis UiS;, Doctoral thesis, 2021-10)Unmanned aerial systems can be used for a range of industrial applications to reduce risk, cost, and time. Fuel cell-based propulsion systems are outlined as a solution to extend mission endurance, one of the current main ... -
Bridge deck aerodynamics: A case study in full-scale
(PhD thesis UiS;, Doctoral thesis, 2022-04)One of the key aspects of bridge deck aerodynamics is the transformation of the incident wind flow into fluctuating surface pressures around a bridge deck. The atmospheric turbulence generates fluctuating loads on bridge ... -
Development of Advanced Numerical Tools for Dynamic Analysis of Aquaculture Structures
(PhD thesis UiS;, Doctoral thesis, 2022-04)Numerical methods to accurately predict dynamic responses of marine aquaculture structures are essential in the engineering design process, because these structures can be subjected to large wave and current loads in the ...