Blar i Institutt for marin teknikk på tittel
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Prediction of Short-term Wind and Wave Conditions Using Adaptive Network-based Fuzzy Inference System (ANFIS) for Marine Operations
(Chapter, 2018)The paper focuses on prediction of short-term environmental conditions by using an improved ANFIS method for marine operations. The hindcast data used here consists of ten-year long one-hourly time series of mean wind speed ... -
Prediction of the accuracy of a dynamic positioning system of a vessel, The Solitaire
(Master thesis, 2011)This report presents the modeling of a pipelay vessel’s motions -the Solitaire- and its DP controller using the bond graph method. The governing equations are obtained with hydrodynamics considerations. Problems of finding ... -
Prediction of Vessel Activity in Arctic Waters using Supervised Learning Methods
(Master thesis, 2022)Raske miljøendringer i Arktis, i form av varmere temperaturer og smelting av havis, fører til lengre navigasjonssesonger og alternative transportveier. Økt sjøtrafikk i de tøffe klimaforholdene fører til en høyere sannsynlighet ... -
Preliminary assessment of increased main engine load as a consequence of added wave resistance in the light of minimum propulsion power
(Journal article; Peer reviewed, 2021)This paper addresses the connection between added wave resistance and required propulsion power of ships, having focus on the early stage of new ship designs, notably tankers and bulk carriers. The paper investigates how ... -
Preliminary Design Methodology Of Concrete Gravity-Based Foundations For Offshore Wind
(Master thesis, 2022)To expand the economic operating range of offshore wind farms, less common but innovative solutions regarding support structures should be considered. To increase the popularity of gravity-based foundations (GBF) within ... -
Preliminary hazard analysis of a small harbor passenger ferry – results, challenges and further work
(Journal article; Peer reviewed, 2019)The Norwegian University of Science and Technology (NTNU), is currently designing a small autonomous passenger ferry for up to 12 passengers. The ferry will bridge a harbor channel in Trondheim, Norway. This paper presents ... -
Preliminary Sizing and Optimization of Semisubmersible Substructures for Future Generation Offshore Wind Turbines
(Peer reviewed; Journal article, 2022)Several key development areas have been identified as having high potential for reducing the levelized cost of energy of offshore wind. Two of the most anticipated developments are future generation large wind turbines and ... -
Preparation of in-service measurement data for ship operation and performance analysis
(Peer reviewed; Journal article, 2020)An increasing number of ships are being equipped with sensors and devices for monitoring of operational behavior, and the amount and access to operational data is gradually increasing. Due to various reasons described in ... -
Pressure-dependent plasticity models with convex yield loci for explicit ice crushing simulations
(Peer reviewed; Journal article, 2022)Despite the viscous behaviour of crushed ice, plasticity models have been widely used for numerical modelling of ‘design-ice’ in damage assessment applications for several reasons outlined herein. The Crushable Foam (CF) ... -
Preventing Tower Resonance Induced by Thrust Variations on a Large 10MW Wind Turbine
(Master thesis, 2015)A simulation model based on a 10MW wind turbine is developed to test the performance of a speed exclusion zone algorithm with the purpose of preventing tower resonance. The model includes rotor aerodynamics, drive-train ... -
Probabilistic Assessment of Ice Environment and Ridge Loads for the Norströmsgrund Lighthouse
(Chapter, 2018)Structural reliability analysis requires statistical distribution of the loads. One such case is ice load calculation for offshore structures. Ice-structure interaction is a highly stochastic phenomenon due to the natural ... -
Probabilistic assessment of ice rose diagrams for ice drift in the beaufort sea
(Journal article; Peer reviewed, 2019)The intention of this paper is to introduce the ice rose diagram, which is a graphical tool that makes it possible to display the ice drift speed, the occurrence frequency, and the drift direction at a particular location ... -
Probabilistic Damage Stability - Evaluating the Attained Subdivision Index by Analysing the Effect of Changes in the Arrangement and Intact Stability for an Offshore Vessel
(Master thesis, 2016)The motivational basis and underlying goal of this master s thesis is to provide more knowledge to the experience data bank for ship designers with respect to probabilistic damage stability (PDS). More precisely, the ... -
Probabilistic Damage Stability - Maximizing the Attained Index by Analyzing the Effects of Changes in the Arrangement for Offshore Vessels
(Master thesis, 2015)Probabilistic damage stability calculations are time demanding and are conducted at a late stage of the design process. A detailed arrangement is required to calculate whether a ship fulfills the requirements. To minimize ... -
Probabilistic Design of Midship Panel based on Model scale compressive Ice Test
(Master thesis, 2013)This thesis is investigating compressive ice loads acting on the mid-ship using a model experiment performed in Aalto ice tank where atactile sensor was mounted on the side. In order to get insight in thevery complex ... -
Probabilistic fatigue model for design and life extension of mooring chains, including mean load and corrosion effects
(Peer reviewed; Journal article, 2022)A probabilistic model for mooring chain fatigue damage is developed based on the S–N approach. The effects of mean load and corrosion condition on the fatigue capacity of the chains are included by adopting a parameterized ... -
A Probabilistic Framework for the Fatigue Damage Assessment of Ships Navigating through Level Ice Fields
(Journal article, 2021)For ships navigating in ice-covered waters, fatigue damage due to ice loads is an important issue. The purpose of this paper is to provide ship researchers and engineers with a simulation-based procedure for a probabilistic ... -
Probabilistic investigation into time domain analysis of feed barge mooring systems.
(Master thesis, 2022)Norsk regnbueørret -og lakse oppdretts volumer har ikke økt nevneverdig de siste årene (SSB, 2021). Dette er på grunn av strenge krav fra staten til industrien, krav til faktorer som tetthet av lus, fiskevelferd og påvirkning ... -
Probabilistic Localization and Mapping of Flexible Underwater Structures using Octomap
(Chapter, 2018)This paper addresses localization and mapping of flexible ocean structures. The methodology is based on a network of low cost acoustic transmitters on the structure and receivers stationed in the vicinity of the structure. ... -
A probabilistic long-term framework for site-specific erosionanalysis of wind turbine blades: A case study of 31 Dutch sites
(Peer reviewed; Journal article, 2021)Rain-induced leading-edge erosion (LEE) of wind turbine blades (WTBs) is associated with high repair and maintenance costs. The effects of LEE can be triggered in less than 1 to 2 years for some wind turbine sites, whereas ...