Blar i Institutt for marin teknikk på tittel
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Uncertainties of Ship Speed Loss Evaluation Under Real Weather Conditions
(Chapter, 2018)A correct assessment of the ship speed loss in conditions of exploitation is becoming increasingly important for ship owners as well as ship designers. We are witnessing the increasing concern for the environment and ... -
Uncertainty analysis of the hydrodynamic coefficients estimation of a nonlinear manoeuvring model based on planar motion mechanism tests
(Journal article; Peer reviewed, 2019)Uncertainty analysis of the identified hydrodynamic coefficients of a nonlinear manoeuvring model is presented in this paper. The classical parameter estimation method, Least Square, is briefly introduced, and the uncertainty ... -
Uncertainty Assessment of Wave Loads and Ultimate Strength of Tankers and Bulk Carriers in a Reliability Framework
(Doktoravhandlinger ved NTNU, 1503-8181; 2010:143, Doctoral thesis, 2010)The main aim of the research work in this thesis is to investigate the uncertainty of wave-induced loads and ultimate strength of tankers and bulk carriers in a reliability framework. The ship structure is generally designed ... -
Uncertainty assessment of wave- and current-induced global response of floating bridges - A numerical investigation
(Doctoral theses at NTNU;2020:126, Doctoral thesis, 2020)Floating pontoon bridge concepts have proven to be useful for crossing very deep and wide waters where conventional bridge types are not feasible, and different concepts have been built in several locations around the world ... -
Uncertainty assessments of structural loading due to frst year ice based on the ISO standard by using Monte-Carlo simulation
(Peer reviewed; Journal article, 2020)Sea ice is the major source of loading for structural design in cold regions. The intrinsic properties of sea ice are generally associated with high degrees of uncertainty due to ice growth taking place during different ... -
Uncertainty in the real-time estimation of ship speed through water
(Peer reviewed; Journal article, 2021)The ship speed through water (STW) is a critical variable for evaluation of ship performance. With a cubic relation to the expected shaft power, even small inaccuracies in measured STW amplifies to more considerable ... -
Uncertainty of full-scale manoeuvring trial results estimated using a simulation model
(Journal article; Peer reviewed, 2017)This paper describes how to estimate the uncertainty of manoeuvring sea trial results without performing repeated tests using only a simulation model. The approach is based on the Monte Carlo method of uncertainty propagation. ... -
Uncertainty of Machine Learning-Based Methods for Wave Forecast and its Effect on Installation of Offshore Wind Turbines
(Doctoral theses at NTNU;2021:325, Doctoral thesis, 2021)Marine operations, such as offshore lifting and mating, are complex and highly weather-sensitive. When planning these weather-restricted opera-tions, it is necessary to determine the response-based operational limits in ... -
Uncertainty quantification in the ice-induced local damage assessment of a hull section
(Journal article; Peer reviewed, 2019)For the northernmost ocean regions, where the ice is occasionally present, one must design a robust structure that can withstand rare ice events (i.e., a glacial ice impact). Despite existing engineering practice is well ... -
Unconventional Propeller Tip Design - Hydrodynamic Study
(Master thesis, 2015)Winglets have been successful in the aircraft industry, but have not yet seen widespread use on marine propellers. Three different propellers (one conventional and two equipped with winglets) have been modelled and analysed ... -
Under what conditions is production of hydrogen from offshore wind power economical?
(Master thesis, 2021)Denne avhandlingen hadde som mål å fastlå under hvilke omstendigheter offshore produksjon av grønn hydrogen er lønnsomt. For å gi et svar på dette spørsmålet, ble en optimeringsmodell laget for finne den beste konfigurasjonen ... -
Underreporting of maritime accidents to vessel accident databases
(Master thesis, 2010)Underreporting of maritime accidents is a problem not only for authorities trying to improve maritime safety through legislation, but also to risk management companies and other entities using maritime casualty statistics ... -
Underreporting of maritime accidents – how it affects risk assessments and suggestions for correction
(Master thesis, 2011)In this report it is looked at how underreporting of maritime accidents affects the results of a risk assessment, from the frequency analysis to the decision-making process. As a basis, a risk model is made and the accident ... -
Understanding Agility as a Parameter for Fuel-Flexible Ships
(SNAME 14th International Marine Design Conference;, Research report, 2022)With the need for lower-emission maritime transport solutions, shipowners and designers face uncertainty when it comes to the selection of fuel today and in the future. The effects of this uncertainty can be mitigated to ... -
Understanding and predicting the effect of entrance cone diameters on the catch efficiency of snow crabs (Chionoecetes opilio) in conical pots
(Peer reviewed; Journal article, 2022)Conical pots with a plastic entrance cone on the top are a type of fishing gear used to harvest snow crabs (Chionoecetes opilio) in Arctic regions. In this study, we assessed the effect of pot entrance diameter on the catch ... -
Understanding Offshore Support Vessel Activity by the Use of AIS Data
(Master thesis, 2019)Denne oppgaven undersøker om Automatisk indentifikasjonssystem (AIS) data kombinert med markedsdata fra offshore olje- og gassindustrien kan gi innsikt i operasjoner utført av forsyningsfartøy. All offshore olje- og ... -
Understanding Polar Environment: Preliminary Results from Deep-Learning-based Segmentation of Optical Ice Images
(Chapter, 2019)Computer vision-aided scene understanding has drawn much attention, especially in autonomous vehicles and advanced driver assistance systems. Image segmentation forms the core of these systems, which is required for effective ... -
Understanding the effect of assumptions on shell plate thickness for arctic ships
(Journal article; Peer reviewed, 2015)The presence of ice requires specially constructed ships. The biggest challenge in this aspect is ice loads on ship’s hull: processes of deformation and fracture of ice are not fully understood and ice geometry and mechanical ... -
Undersøkelse av lysrespons og svømmeadferd hos lakselus (Lepeophtheirus salmonis) ved hjelp av deteksjon og sporing
(Master thesis, 2019)Denne masteroppgaven har vært en del av det tverrfaglige prosjektet Profylax, som har hatt fokus på å øke kunnskapen om lakselus som er et økende problemet i oppdrettsnæringen. Muligheten for å bruke datasynverktøy til å ... -
Undersøkelse av lysrespons og svømmeadferd hos lakselus (Lepeophtheirus salmonis) ved hjelp av deteksjon og sporing
(Master thesis, 2019)Denne masteroppgaven har vært en del av det tverrfaglige prosjektet Profylax, som har hatt fokus på å øke kunnskapen om lakselus som er et økende problemet i oppdrettsnæringen. Muligheten for å bruke datasynverktøy til å ...