Browsing Department of Mechanical and Structural Engineering and Materials Science (TN-IMBM) by Title
Now showing items 1580-1599 of 1695
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Trends of using polymer composite materials in additive manufacturing
(Peer reviewed; Journal article, 2019)Additive manufacturing (AM) technology is nowadays one of the advanced manufacturing technologies used to convert three dimensional product data to physical objects without any special tooling. The emergence of the technology ... -
Triple-lidar measurements of wind across a virtual rotor plane over a sea surface
(Peer reviewed; Journal article, 2023)An improved understanding of the spatiotemporal characteristics of the wind velocity field above the sea surface will benefit the design of modern offshore wind turbines. This study examines wind velocity data recorded on ... -
Troubleshooting a complex offshore system based on technical evaluation and integrity assessments - case study of module handling system
(Masteroppgave/UIS-TN-IKM/2012;, Master thesis, 2012)The offshore industry is seeing the advent of new technologies and complex systems as it ventures into harsher and more remote locations. Integrity and reliability are the keys to such systems. It is critical to technically ... -
Tuning for robust and optimal dynamic positioning control in BlueROV2
(Peer reviewed; Journal article, 2021)A tuning approach for the robust and optimal dynamic positioning control of BlueROV2 subjected to currents with varying speeds and headings is presented. A 2D planar dynamic model of BlueROV2 is developed in Matlab/Simulink ... -
Turbulence in a coastal environment: the case of Vindeby
(Journal article; Peer reviewed, 2022-08-11)The one-point and two-point power spectral densities of the wind velocity fluctuations are studied using the observations from an offshore mast at Vindeby Offshore Wind Farm, for a wide range of thermal stratifications of ... -
Two-body dynamic simulations of a combined semi-submersible floating offshore wind turbine and torus wave energy converter
(Peer reviewed; Journal article, 2023)Dynamic responses of a combined wind and wave energy system which consist of a 5MW semi-submersible floating offshore wind turbine (FOWT) and a torus-shaped wave energy converter (WEC) are investigated. In the investigated ... -
Typical hydrodynamic models for aquaculture nets: A comparative study under pure current conditions
(Peer reviewed; Journal article, 2020-03)The net is regarded as the most critical component in marine aquaculture facilities as it is the only barrier which protects the environment from fish escapes. Accurate predictions of the net cage deformation and drag force ... -
Tøyningsberegning av Brunnholen bru i byggeperioden
(Masteroppgave/UIS-TN-IKM/2017;, Master thesis, 2017-06-12)I denne rapporten er det gjennomført tøyningsberegninger på et etter oppspent betong bru. Bruen er et kasse bru som skal bygges i 5 byggefaser i Sandnes kommune. Bruen består av 5 spenn med to kasser og har en horisontal ... -
UiS Subsea-Freight Glider: A large buoyancy-driven autonomous cargo glider
(Peer reviewed; Journal article, 2022)This study presents the baseline design for the autonomous subsea vehicle capable of traveling at a lower speed of 1 m/s with an operating range of 400 km. Owing to UiS subsea-freight glider’s (USFG) exceedingly economical ... -
Ultimate capacity of pad eyes in lifting operations
(Masteroppgave/UIS-TN-IKM/2016;, Master thesis, 2016-06-15)Lifting is an essential part of almost every offshore operation, which includes a variation of structures with different sizes, shapes and weights. To ensure safe lifting operations, lifting equipment must be utilized. ... -
Ultra-Deep Water High Pressure Riser Concept Offshore Brazil
(Masteroppgave/UIS-TN-IMBM/2018;, Master thesis, 2018-06-15)Since the 1950s, risers have continued to be an important part of an oil and gas producing field. As the primary equipment that conveys fluids to and from the topside vessel, it is important ... -
Uncertainties in current measurements in the northern North Sea
(Journal article; Peer reviewed, 2017)A met–ocean measurement program of waves and current profiles at five locations in the northern North Sea was performed over a period of approximately 5 years. Despite quality control, the measured current speed data ... -
Uncertainty Analysis of a Safety Operating Envelope for a Subsea Shuttle Tanker
(Master thesis, 2023)This thesis investigates the uncertainty of a safety operating envelope (SOE) for a subsea shuttle tanker (SST). The main focus of this work is on the jam-to-rise and jam-to-dive aspects of the accidental cases for the ... -
Understanding of buoyancy in drill pipe and risers
(Masteroppgave/UIS-TN-IKM/2013;, Master thesis, 2013)This thesis highlights that there is a wide spread use of the term “buoyancy” in the petroleum industry which can lead to misunderstandings. It is also evident that terms like “effective tension”, “true wall tension” and ... -
Undersøkelse av brønnverktøy
(Bachelor thesis, 2022)Denne oppgaven er skrevet i samarbeid med Interwell Norway AS. Oppgaven bygger på en undersøkelse av deres nylig innkjøpte brønnverktøy som består av flere mekaniske, elektriske og hydrauliske moduler. Formålet med ... -
Undersøkelse av de mekaniske egenskapene til CO2 herdet betong med naturlige aggregater.
(Bachelor thesis, 2021)Betongproduksjon er en av industriene med størst CO2 utslipp i verden. En liten reduksjon i CO2 utslippene fra denne industrien kan derfor være svært gunstig for å nå klimamålene. Herding ved akselerert karbonatisering ... -
Unfrozen Skewed Turbulence for Wind Loading on Structures
(Peer reviewed; Journal article, 2022)The paper introduces an algorithm to generate a three-variate four-dimensional wind turbulence field suited for yawed wind dynamic load simulation. At large yaw angles, a relaxation of Taylor’s hypothesis of frozen turbulence ... -
Unlocking Household Electricity Consumption in Pakistan
(Peer reviewed; Journal article, 2021-11)In Pakistan, data for household electricity consumption are available in the form of monthly electricity bills only, and, therefore, are not helpful in establishing appliance-wise consumption. Further, it does not help in ... -
Unsteady RANS Simulations of Flow around a Twin-Box Bridge Girder Cross Section
(Journal article; Peer reviewed, 2019-07)The aerodynamic performance of bridge deck girders requires a thorough assessment and optimization in the design of long-span bridges. The present paper describes a numerical investigation of the aerodynamic characteristics ... -
Upheaval buckling of buried pipelines
(Masteroppgave/UIS-TN-IKM/2009;, Master thesis, 2011)This thesis is divided into two parts. The first part consists of an introduction to theory and design aspects regarding the subject of thermal buckling with main focus on buried pipelines. The second part introduces the ...