Blar i Institutt for marin teknikk på tittel
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Vision-Aided Inertial Navigation for Underwater Vehicles Using ArUco Markers
(Master thesis, 2021)Skiftet fra tradisjonell olje- og gassproduksjon mot produksjonsenheter på havbunnen har skapt et økt behov for undervannsoperasjoner. Dette har motivert bruken av autonomi for å effektivisere operasjoner og redusere ... -
Visual Aided Deep Learning Applications for Underwater Operations
(Master thesis, 2019)Den 4. industrielle revolusjonen har pågått de siste fire årene og resultater har begynt å vise seg i industrimarkedet. Google slipper stadig ny teknologi som kan slå mennesker i et mangfold av strategispill og de har ... -
Visual Close-range Navigation and Docking of Underwater Vehicles Using ArUco Markers
(Master thesis, 2022)Det er økende interesse fra forskningsmiljøer rundt undervannsrobotikk i permanent boende autonome hjelpesystemer for undervannsroboter. Disse systemene vil drastisk senke CO2-fotatrykket og kostnadene til undervannsoperasjoner, ... -
Visual Estimation of Motion for ROVs - Increasing Accuracy for ROV Navigation
(Master thesis, 2018)This project thesis presents how a remotely-operated vehicle (ROV) can increase its situational awareness and positioning accuracy based on visual inputs from a stereo camera and vision-based ego-motion estimation. This ... -
Visual Simultaneous Localization and Mapping Applied on Work Class ROVs
(Master thesis, 2020)Denne oppgaven undersøker muligheten for å bruke Visuell Simultan Lokalisering og Kartlegging (VSLOK) til å øke den lokale situasjonsbevistheten og lokale posisjonsnøyaktighet til fjernstyrte undervannsarbeidsfarkoster ... -
Visualizing risk related information for work orders through the planning process of maintenance activities
(Journal article; Peer reviewed, 2018)Major accidents are characterized by complex causal patterns with many factors influencing the occurrence of such accidents. Within the offshore petroleum industry the causes can be found not just in the execution of ... -
VIV Fatigue of dynamic power cables applied in offshore wind turbines
(Master thesis, 2021)In this work, the effect of vortex-induced vibrations (VIV) on the fatigue strength of subsea power cables were investigated by the implementation of a non-linear time domain analysis methodology. To have a better understanding ... -
VIV fatigue of rigid spool for subsea template by a time domain model
(Master thesis, 2020)Subsea spools and jumpers are commonly placed close to the seabed where they are exposed to low velocity currents. These currents lead to vortex induced vibrations (VIV) in in-line (IL) and cross-flow (CF) direction. VIV ... -
VIV in Free Spanning Pipelines
(Doktoravhandlinger ved NTNU, 1503-8181; 2013:371, Doctoral thesis, 2013)Two important aspects of vortex induced vibrations (VIV) in free spanning pipelines are so far not satisfactorily understood; the complex interaction between in-line (IL) and cross- ow (CF) response, and the signicance of ... -
VIV suppression in 2D circular cylinders through staggered grooves: A numerical investigation at low Reynolds number
(Master thesis, 2023)Vortex-induced vibration (VIV), a ubiquitous fluid-structure interaction phenomenon, plays a crucial role in the operational safety and longevity of various engineering structures subjected to fluid flow, such as marine ... -
Voltage Sensor Fault Detection in Li-ion Battery Energy Storage Systems
(Chapter, 2022)Safe and optimal operation of battery energy storage systems requires correct measurement of voltage, current, and temperature. Therefore, fast and correct detection of sensor faults is of great importance. In this paper, ... -
Voluntary Speed Loss of Ships
(Master thesis, 2017)When a ship is caught in heavy seas, speed loss follows. This thesis focuses on the subjective part of speed loss; voluntary speed reductions to maintain the safety of the ship, the cargo and the people. The objective is ... -
Vortex dislocation mechanisms in the near wake of a step cylinder
(Peer reviewed; Journal article, 2020)Vortex interactions behind step cylinders with diameter ratio D/d = 2 and 2.4 at Reynolds number ( ReD ) 150 were investigated by directly solving the three-dimensional Navier–Stokes equations. In accordance with previous ... -
Vortex dynamics and flow patterns in a two-dimensional oscillatory lid-driven rectangular cavity
(Peer reviewed; Journal article, 2020)The vortex dynamics in a two-dimensional oscillatory lid-driven cavity with depth-to-width ratio 1:2 has been investigated, covering a wide range of Reynolds numbers and Stokes numbers where this flow is known to be in the ... -
Vortex Induced Fatigue Damage of a Steel Catenary Riser near the Touchdown Point
(Master thesis, 2013)In this thesis, the fatigue damage of a steel catenary riser was investigated, especially in the vicinity of the touchdown point.The steel catenary riser is a promising riser solution due to its simplicity and low cost. ... -
Vortex Induced Vibrations in Fish Farm Structural Elements
(Master thesis, 2015)Norway produces over 14 million meals of salmon every day. This corresponds to an annual value of close to 40 billion NOK. The world s continuous population increase will require a substantial increase in food production. ... -
Vortex induced vibrations of free span pipelines
(Doktoravhandlinger ved NTNU, 1503-8181; 2009:106, Doctoral thesis, 2009)Pipelines from offshore petroleum fields must frequently pass overareas with uneven seafloor. In such cases the pipeline may havefree spans when crossing depressions. Hence, if dynamic loads canoccur, the free span ... -
Vortex Induced Vibrations of Marine Risers
(Master thesis, 2012)SummaryThis Master s Thesis goal is to present fundamental physical aspects of Vortex Induced Vibrations (VIV) of marine risers, and outline methods for suppression of VIV. Main emphasis has been given to the use of strakes, ... -
Vortex Induced Vibrations of Pipelines With Non-Linear Seabed Contact Properties
(Chapter; Peer reviewed, 2016)A promising time domain model for calculation of cross-flow vortex induced vibrations (VIV) is under development at the Norwegian University of Science and Technology. Time domain, as oppose to frequency domain, makes it ... -
Vortex Induced Vibrations of Slender Marine Structures
(Master thesis, 2013)The main objective of this thesis is to study the behaviour of slender marine structures exposed to vortex induced vibrations (VIV). Especially the interaction between active response frequencies is important. This is done ...