Browsing Institutt for marin teknikk by Title
Now showing items 1682-1701 of 3429
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Improved user-experience for control of ROVs
(Master thesis, 2016)To make small size underwater Remotely Operated Vehicles(ROVs) more accessible for normal users efficient Human-Machine Interface(HMI) solutions are needed. In this theses two solutions are presented. One uses a Windows ... -
Improved VIV Prediction of Free Spanning Pipelines and Cables
(Master thesis, 2022)Sammendrag Denne oppgaven omhandler validering og kalibrering av en tidsplanmodell for å beregne virvelindusert respons (VIV) av frie spenn i rørledninger utsatt for strømkrefter. Målet med var på den ene siden å presentere ... -
Improved VIV Response Prediction Using Adaptive Parameters and Data Clustering
(Peer reviewed; Journal article, 2020)Slender marine structures such as deep-water riser systems are continuously exposed to currents, leading to vortex-induced vibrations (VIV) of the structure. This may result in amplified drag loads and fast accumulation ... -
Improvement of safety during crane and lifting operations offshore based on improved logistic planning
(Master thesis, 2011)This paper is written to estimate the effect improvement in the logistic planning would have on risk of offshore crane and lifting operations. The effect of logistic planning has on the safety has been modeled as a part ... -
Improvement of Thermodynamic Properties in Combustion Research Facility with Symmetrical Ignition Sources
(Master thesis, 2016)The Constant Volume Combustion Chamber (CVCC) at the Combustion Laboratory at the Institute of Marine Technology has shown: (I) Temperature related issues that reduce reproducibility within test series. (II) The environment ... -
Improving extreme anchor tension prediction of a 10-MW floating semi-submersible type wind turbine, using highly correlated surge motion record
(Peer reviewed; Journal article, 2022)Extreme value prediction of the load-effect responses of complex offshore structures such as the floating wind turbine (FWT) is crucial in ultimate limit state (ULS) design. This paper considers two cases to understand the ... -
Improving pre-turbine SCR systems in marine two stroke diesel engines using hybrid turbocharging: a numerical study of SCR operation range and system fuel efficiency
(Journal article; Peer reviewed, 2019)In this article, a performance evaluation of a novel system solution combining a hybrid turbocharger and a pre-turbine selective catalytic NOx reduction system is carried out. Pre-turbine selective catalytic system are ... -
Improving Reliability Centered Maintenance Methodology for oil and gas application
(Master thesis, 2013)Traditional RCM approach concerns important functions of the system, and thoroughly obtained/selected PM action can certainly improve reliability of the system, but this approach cannot address and deal with all the aspects ... -
Improving safety of DP operations: learning from accidents and incidents during offshore loading operations
(Journal article; Peer reviewed, 2017)The risk caused by DP vessels in offshore marine operations is not negligible, due to wide applications of DP vessels in complex marine operations, and the sharp increase of DP vessel population. The DP accidents/incidents ... -
Improving Ship Operational Efficiency by Statistical Analysis of Voyage Data
(Master thesis, 2014)As a result of increased fuel oil prices the fuel cost accounts for an increasingly larger portion of the total operation costs for a vessel. Traditionally the fuel cost has been low compared to costs related to crewing ... -
Improving Vortex-Induced Vibration Prediction Using Hybrid Analytic
(Master thesis, 2023)Prediksjoner av virvel-induserte vibrasjoner (VIV) er av stor betydning i design- og levetidsberegninger for slanke strukturer i havet. Modellene brukt i dag, har flere forenklinger som gjør at de ikke klarer å beskrive ... -
Improving “walk-to-work” gangway operation through ship design optimization
(Master thesis, 2020) -
IMU-based sea state estimation using convolutional neural networks for DP vessels
(Master thesis, 2020)Oppgaven utforsker muligheten for sjøtilstandsestimering basert på målt skipsrespons. IMU sensorer installert flere steder på et DP skip muliggjør estimering av akselerasjonene til skipet, som videre kan brukes til å trene ... -
In situ coastal observations of wave homogeneity and coherence
(Peer reviewed; Journal article, 2022)A better understanding of wave homogeneity, i.e. the spatial variations of the wave characteristics, and wave coherence in coastal areas and fjords is essential for the design and analysis of sea-crossing infrastructures, ... -
In-Line Vibrations of Flexible Pipes
(Chapter; Peer reviewed, 2017)A semi-empirical prediction tool for pure in-line vortex-induced vibrations is under development. The long-term goal is to be able to realistically model the dynamic behavior of free spanning pipelines exposed to arbitrary ... -
Including the Effect of Shielding in Prediction of Weather Window for Offshore Lifting Operations
(Master thesis, 2015)The offshore industry is constantly seeking to operate in more extreme conditions. DeepOcean is a subsea service company, where offshore lifts is a part of every day operations. To remain competitive, it is important to ... -
Incorporating software failure in risk analysis – Part 1: Software functional failure mode classification
(Peer reviewed; Journal article, 2020)Advanced technological systems consist of a combination of hardware and software, and they are often operated or supervised by a human operator. Failures in software-intensive systems may be difficult to identify, analyze, ... -
Incorporating software failure in risk analysis––Part 2: Risk modeling process and case study
(Journal article; Peer reviewed, 2020)The advent of autonomous cars, drones, and ships, the complexity of these systems is increasing, challenging risk analysis and risk mitigation, since the incorporation of software failures intro traditional risk analysis ... -
Increasing catch efficiency for Nephrops in deep-water shrimp (Pandalus borealis) trawl fisheries
(Peer reviewed; Journal article, 2022)In Skagerrak and the North Sea, coastal vessels harvest deep-water shrimp (Pandalus borealis) in a mixed fishery, in which catches of Nephrops (Nephrops norvegicus) are of economic importance for the fleet. Fishermen ... -
Increasing the Operation Window of Dynamic Positioned Vessels Using the Concept of Hybrid Control
(Chapter; Peer reviewed, 2014)In order to extend the operational window of marine vessels, the high-level control of the dynamic positioning (DP) system is revised. Major contributions of this paper include the modeling of a hybrid controller for a DP ...