Department of Mechanical and Structural Engineering and Materials Science (TN-IMBM): Nye registreringer
Viser treff 901-920 av 1741
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CFD investigations of scour beneath a submarine pipeline with the effect of upward seepage
(Peer reviewed; Journal article, 2020-12)A numerical model of scour beneath subsea structures considering the effect of upward seepage in the seabed is proposed. A small seepage can cause significant changes to the hydrodynamic force on the bed surface and stability ... -
Property characterization of acacia tortilis for natural fiber reinforced polymer composite
(Peer reviewed; Journal article, 2019-12)Eco-friendliness and availability of green fiber reinforced based composites attracted many as a potential replacement for non-biodegradable synthetic fiber. Green composites are biodegradable and less susceptible to health ... -
Numerical investigation of wave-plus-current induced scour beneath two submarine pipelines in tandem
(Peer reviewed; Journal article, 2019-12)Two-dimensional (2D) local scour beneath two submarine pipelines in tandem under wave-plus-current conditions is investigated numerically. A fully-coupled hydrodynamic and morphologic model based on unsteady Reynolds-averaged ... -
Effekten av å tilsette CO2 i fersk betong
(Masteroppgave/UIS-TN-IMBM/2020;, Master thesis, 2020-06)Tilsetting av karbondioksid (CO2) i fersk betong er potensielt en ny metode for produksjon av en mer bærekraftig betong. Tidligere forskning har vist lovende resultater angående effekten på betongens mekaniske egenskaper ... -
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 ... -
The Influence of Unstable Wind Models on the Motions and Loads of a Semi-Submersible Floating Wind Turbine
(Masteroppgave/UIS-TN-IMBM/2020;, Master thesis, 2020-07-14)As the wind turbine industry continues to play a part in the production of energy, the need for larger and more powerful wind turbines keeps increasing. The movement towards offshore wind turbine structures provides ... -
Cost Improvement of Seal Retainer
(Masteroppgave/UIS-TN-IMBM/2020;, Master thesis, 2020-06)The objectives of the thesis are to optimize the tip angle of the seal retainers and to determine cheaper materials that are appropriate for the application of the tool. Seal retainers are used to retain seals on valve ... -
Stability of Vessels in an Ice-free Arctic
(Peer reviewed; Journal article, 2020-09)One consequence of the declining ice cover in the Arctic is increased areas of open seas. These new open sea areas lead to some challenging aspects related to ship stability. Longer fetch lengths, associated with build-up ... -
Comparison of weather data from FINO3 and ERA5 in Wind Farm Installation Campaign Simulations.
(Masteroppgave/UIS-TN-IMBM/2020;, Master thesis, 2020-06-30)Weather data are commonly used in the planning phase of an offshore wind farm installation campaign. Knowledge of site-specific weather conditions is of great importance regarding transport and installation as well as ... -
Parametric study of different unbonded tendon layouts in pre-stressed concrete flat plates
(Peer reviewed; Journal article, 2020-11)Post-tensioned unbonded tendons are widely used in fat slabs/plates when there is a demand for large span lengths, durable tendons and a reduction in the weight of structure. For post-tensioned fat slab/plates, diferent ... -
Numerical Investigation of Vortex-Induced Vibrations of a Flexible Riser with Staggered Buoyancy Elements
(Peer reviewed; Journal article, 2020-01)This paper presents a numerical algorithm used together with a Finite-Element based Vortex-Induced Vibration (VIV) prediction software VIVANA to obtain a hydrodynamic force coefficient database based on response measurements ... -
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 ... -
Survival in cold waters - learnings from participation in cold water exercises - a regulatory perspective related to the Norwegian offshore industry
(Peer reviewed; Journal article, 2019)Participation in exercises lead by the University of Stavanger, the SARex 1 in 2016 and SARex 2 in 2017, provided valuable lessons related to survival in a cold maritime environment. The scenario of the exercises was a ... -
Investigation of updating methods for probability-informed inspection planning for offshore structures
(Peer reviewed; Journal article, 2019)The paper presents a novel process for probability-informed inspection planning based on the following principles. 1) A description of the strength of knowledge about a problem shall be included and be accounted for in the ... -
Numerical study on thermal effects in an electric subsea robotic actuator
(Masteroppgave/UIS-TN-IMBM/2020;, Master thesis, 2020-07-07)A remotely operated vehicle (ROV) is equipped with two robotic manipulators. Current manipulators are hydraulically actuated. The industry has uncovered the potential in replacing hydraulic-based technology with its ... -
On the wake flow behind a sphere in a pipe flow at low Reynolds numbers
(Peer reviewed; Journal article, 2020-10)Numerical simulations are carried out to investigate the flow around a stationary sphere in a pipe. Seven sphere diameters d = 0.1D–0.9D (D is the diameter of the pipe) are chosen to investigate the effects of the blockage ... -
Random Wave-Induced Momentary Liquefaction around Rubble Mound Breakwaters with Submerged Berms
(Peer reviewed; Journal article, 2020-05)The effects of submerged berms in attenuating the momentary liquefaction beneath rubble mound breakwaters under regular waves were investigated in a recent study. The present work aims to investigate the momentary liquefaction ... -
Tre-betong samvirkedekker i Norge/Skandinavia: Nylig utvikling og dimensjoneringsmetoder
(Masteroppgave/UIS-TN-IMBM/2020;, Master thesis, 2020-06-03)Samvirkedekker i tre og betong er et nytt og spennende tema for norsk byggebransje. Massivtre har fått mye oppmerksomhet og har blitt et populært byggemateriale de siste årene. På bakgrunn av dette har denne oppgaven som ... -
Modelling and Analysis of the City Bridge of Stavanger
(Masteroppgave/UIS-TN-IMBM/2020;, Master thesis, 2020-07)At the City Bridge of Stavanger, or Bybrua, there have been recorded vibrations of stay cables that does not have a clear explanation. Due to the age of the structure and this occurrence, Statens Vegvesen and University ... -
E39 and Slipforming of environmental-friendly concrete
(Masteroppgave/UIS-TN-IMBM/2020;, Master thesis, 2020-06-15)Slipforming is a construction method that has been used in many years for production of concrete structures and it is mainly suited for tall structures such as towers, bridge columns, silos, and offshore platforms with ...