Blar i Institutt for marin teknikk på tittel
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Vibration-based Fault Detection and Condition Monitoring of Mechanical Systems in Wind Turbines
(Master thesis, 2018)An increased energy demand of the future, combined with problems related to climate change and emissions of greenhouse gases, has made solutions for reliable and efficient renewable energy producers attractive. Wind turbines ... -
Virtual Prototyping for Marine Crane Design and Operations
(Doctoral theses;2018:10, Doctoral thesis, 2018)Marine crane system design is an interdisciplinary process involving such as mechanical design, kinematics, multi-body dynamics, hydraulics, and operational control-related tasks. Marine crane operations are inherently ... -
Virtual Prototyping of Maritime Systems and Operations: Applications of Distributed Co-Simulations
(Journal article, 2017)In this work, we demonstrate the use of co-simulation technology in the maritime industry through four relevant examples of applications based on the outcome of the knowledge-building project Virtual Prototyping of Maritime ... -
Viscous flow around a circular cylinder near a plane wall
(Master thesis, 2011)Marine pipelines placed at or near the seabed are exposed to currents and waves. In the presence of a sedimentary seabed, the interaction between the surrounding water motions and the pipeline may cause erosion of sediments ... -
Viscous flow around a simplified model of a Christmas tree
(Master thesis, 2016)In the petroleum industry, a Christmas tree is a structure consisting of valves and spools that sits atop an oil well. In order to better understand the forces acting on a Christmas tree during and after installation, ... -
Viscous Flow Around Finite Lenght Circular Cylinder
(Master thesis, 2012)Viscous flow around circular cylinders is a classical research topic in fluid dynamics with a vast amount of practical applications in the field of offshore marine technology. In the flow around cylinders of finite length, ... -
Viscous Flow Around Inclined Circular Cylinder
(Master thesis, 2017)Circular cylinder is of vital importance in the marine industry. The goal of this thesis is to study the physical phenomenon around the inclined circular cylinder as well as the forces acting on it. The study is mainly ... -
Vision Based Localization for Subsea Intervention
(Chapter; Peer reviewed, 2017)A vision based underwater localization system using fiducial markers is proposed. The system is implemented as a new control mode in a shared control system for ROVs and tested experimentally in a pool. A high accuracy ... -
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 ...