Browsing NTNU Open by Author "Steen, Sverre"
Now showing items 21-40 of 134
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Data mining methods for the analysis of power systems of vessels
Swider, Anna (Doctoral theses at NTNU;2018:412, Doctoral thesis, 2018)Measurements from on-board monitoring systems of vessels are now increasingly available for data analysis, and their relevance is growing as the ship industry enters the digitilization phase. The analysis of data from ... -
Design and Testing of Non-Axisymmetric Propeller Ducts
Haavik, Andreas Stangeland (Master thesis, 2015)Ducted propellers are widely used on large range of vessels, especially for increased thrust, which is important on vessels like anchor handlers and trawlers. In the later years new manufacturing techniques have been ... -
Design optimization of offshore construction vessels
Sandvik, Endre (Master thesis, 2016)The topic of this thesis is optimization of ship design with regards to operational performance. 4 VARD Offshore Subsea Construction Vessels are analysed to find the optimum compromise of operability versus required power, ... -
Detection of encountered waves by using pressure measurements in the bow area of a ship
Emmerhoff, Jonas (Master thesis, 2020)Frem til nå finnes det ulike metoder å estimere hva bølgetilstanden er på skip. Noen av de eksisterende metodene som finnes er bølgeradarer, bølgebøyer og LIDAR, som er en optisk fjærnmålingsteknikk som bruker et emiterende ... -
Determination of Minimum Propulsion Power to Maintain the Manoeuvrability of Ships in Adverse Conditions
Slettevold, Yngvild (Master thesis, 2014)The Energy Efficiency Design Index (EEDI), quantifying the amount of carbon dioxide emitted per gram fuel consumed, is to be fully implemented in the coming years. Compliance with the EEDI requirements can be achieved in ... -
Development of a Method for Weather Routing of Ships
Eskild, Hege (Master thesis, 2014)Weather routing is a method within ship routing that is used to avoid rough weather and to find the minimal fuel, time or cost route between ports. Several methods and different software exit and are available to the ship ... -
Development of a numerical simulation model of the forces on ventilating propellers
Hvidsten, Erik (Master thesis, 2014)Ships and marine structures operating with propellers will from time to time experience severe, instantaneous thrust and torque losses to air drawing to the propeller. This is known as ventilation, and it may cause serious ... -
Development of a reliability model for crack growth occurrence for a secondary hull component
Kleivane, Siri Kolle; Leira, Bernt Johan; Steen, Sverre (Peer reviewed; Journal article, 2023) -
Development of a Simulation Model for Propeller Performance
Dalheim, Øyvind Øksnes (Master thesis, 2015)The simulation model PropSiM for simulation of propeller performance has been developed and implemented into Simulink. The simulation model generates a time domain solution to the six degree of freedom propeller forces in ... -
Distributed propulsion for ships
Nylund, Vilde (Master thesis, 2017)It is anticipated that using distributed electric propulsion (DEP) on conventional ships will increase the total propulsive efficiency. This is mainly due to two reasons; firstly, because the total propeller disk area can ... -
Dynamics of a Marine Propulsion System With a Diesel Engine and a Propeller Subject To Waves
Taskar, Bhushan; Yum, Koosup; Pedersen, Eilif; Steen, Sverre (Chapter; Peer reviewed, 2015)When travelling in waves, the efficiency of the propulsion system is in most cases reduced, due to a variety of different effects. Traditionally, the performance of propeller and engine is analyzed separately. However, ... -
Effect of change of propulsion system on M/S Midnatsol
Hasfjord, Nikolai (Master thesis, 2017)In 2016 the costal liner M/S Midnatsol had her main thruster system changed from the twin fixed pitch contrarotating thruster system Contaz to the twin controllable pitch Azipull thruster system. The purpose of this thesis ... -
Effect of waves on cavitation and pressure pulses
Taskar, Bhushan; Steen, Sverre; Bensow, Rickard E; Schröder, Björn (Journal article, 2016)In view of environmental concerns, there is increasing demand to optimize the ships for the actual operating condition rather than for calm water. Now, in order to apply this for propeller design, a first step would be to ... -
Effect of waves on cavitation and pressure pulses of a tanker with twin podded propulsion
Taskar, Bhushan; Steen, Sverre; Eriksson, Jonas (Journal article, 2017)There is increasing interest in optimizing ships for the actual operating condition rather than just for calm water. In order to optimize the propeller designs for operations in waves, it is essential to study how the ... -
An Efficient Method for Design and Powering Prediction of Fast Slender Catamarans
Godø, John Martin Kleven; Steen, Sverre; Faltinsen, Odd Magnus (Journal article; Peer reviewed, 2023)This paper presents a parameterized and mathematically defined hull shape that can be tuned to represent modern passenger fast ferries. Additionally, a resistance calculation model for high-speed slender round-bilge ... -
An Efficient Method for Unsteady Hydrofoil Simulations, based on Non-Linear Dynamic Lifting Line theory
Godø, John Martin Kleven; Steen, Sverre (Journal article; Peer reviewed, 2023)This paper presents a Non-linear Dynamic Lifting Line (NDLL)-based method for analysing hydrofoil vessels in waves. The method is validated, and its utility is demonstrated in a case study. The NDLL accounts for dynamic ... -
Empirical Prediction of Residuary Resistance of Fast Catamarans
Førrisdal, Even Wollebæk (Master thesis, 2018)This thesis focuses on resistance of fast displacement catamarans, with the purpose of developing an empirical residuary resistance estimation method based on artificial neural networks. The study builds on work carried ... -
Empirical prediction of resistance of fishing vessels
Kleppestø, Kristoffer (Master thesis, 2015)The possibility to use Artificial Neural Network for estimating ship resistance and propulsion coefficients are investigated. Different ANNs are tested by varying input parameters, network size and complexity and division ... -
Estimation of fuel consumption using discrete-event simulation - a validation study
Sandvik, Endre; Asbjørnslett, Bjørn Egil; Steen, Sverre; Johnsen, Trond Andreas Vikan (Chapter, 2018)In this paper, we investigate the validity of quasi-static discrete-event simulation for estimation of fuel consumption and assessment of energy effective ship designs. Stricter emission regulations for ships and developments ... -
Estimation of Speed Loss due to Current, Wind and Waves - A Data-Driven Approach
Gjølme, Jens Christoffer (Master thesis, 2017)There is an increasing demand from customers, governments and maritime authorities when it comesto emission control and energy efficiency in the maritime industry. Demands in efficiency requires amore ...