Browsing Institutt for marin teknikk by Title
Now showing items 1284-1303 of 3413
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Experimental studies of a damaged ship section in forced heave motion
(Journal article; Peer reviewed, 2019)This work documents a detailed series of experiments performed in a wave flume on a thin walled prismatic hull form. The model consists of a rectangular opening located on the side. The length of the model is slightly ... -
Experimental study of an offshore aquaculture cage concept
(Master thesis, 2023)Behov for bærekraftig matproduksjon øker betydelig i takt med en økt global befolkning og global oppvarming. Nye klimavennlige løsninger må integreres og utvikles for å møte den økende etterspørselen etter mat, hvor ... -
Experimental study of current forces and deformations on a half ellipsoidal closed flexible fish cage
(Journal article; Peer reviewed, 2016)Closed flexible fish cages are proposed as a new concept in marine aquaculture, replacing the conventional net cages in order to meet ecological challenges related to fish lice and escapes. It is important to understand ... -
Experimental study of drilling riser and wellhead force by small scale testing
(Peer reviewed; Journal article, 2022)Small-scale model tests of a drilling riser were conducted, aiming at a better understanding of the mechanical transfer of forces from the drilling riser to the wellhead. The tests were conducted in a water tank with ... -
Experimental Study of High-Pressure Gas Injection Using Optical Methods
(Master thesis, 2018)This thesis first presents the role of LNG as a potential means to reduce marine emissions and get international shipping into compliance with new regulations set by regulatory authorities. An overview of different gas ... -
Experimental Study of Hydrodynamic Loads on Ventilated Plates Near the Free Surface
(Master thesis, 2020)De hydrodynamiske kreftene på forenklede strukturer blir studert for å undersøke hvordan krefter varierer med porøsitet og nedsenking, samt gi en sammenligning mellom harmoniske oscillasjoner og bølger. Tvungne oscillasjoner ... -
Experimental Study of Ignition Delay, Combustion, and NO Emission Characteristics of Hydrogenated Vegetable Oil
(Journal article; Peer reviewed, 2019)In this article, a comparative study of hydrogenated vegetable oil (HVO) and diesel was performed in two constant volume combustion rigs and an optical accessible compression-ignited chamber (OACIC). Ignition, combustion, ... -
Experimental Study of Splash Zone Wave Loads on a Combined Configuration of a Porous Plate and a Circular Cylinder
(Master thesis, 2020)Løfteanalyse av en undervanns-struktur bestemmer operasjonsgrensen hva angår sjøtilstand for å gjennomføre operasjonen under trygge forhold. Denne grensen bestemmes av de største forventede kreftene i løftesystemet. ... -
Experimental study of the functionality of a semisubmersible wind turbine combined with flap-type Wave Energy Converters
(Journal article; Peer reviewed, 2016)In the present paper the functionality of the Semisubmersible wind energy and Flap-type wave energy Converter (SFC) is examined experimentally. In order to study the functionality of the SFC, the focus is on operational ... -
Experimental study of vortex-induced vibration of a twin-tube submerged floating tunnel segment model
(Peer reviewed; Journal article, 2020)The cross-flow vortex-induced vibration features of a submerged floating tunnel element, which is composed of two rigidly connected cylinders in a tandem configuration, were investigated via a self-oscillation model test ... -
Experimental Study on the Drag Forces on a Twin-tube Submerged Floating Tunnel Segment Model in Current
(Journal article; Peer reviewed, 2020)In this paper, the drag forces on a rigid segment of a twin-tube submerged floating tunnel (SFT) under various Re number and submergence are experimentally investigated with a simplified rigidly connected tandem twin-cylinder ... -
Experimental study on the effect of second order wavemaker theory on the response of a flexible large diameter monopile in irregular sea
(Peer reviewed; Journal article, 2021)Motivated by the need for larger offshore wind turbines, large diameter monopile foundations are being developed. To ensure safe design, there is a need for model testing and validation of hydrodynamic load models. Scaled ... -
Experimental Study on the Hydrodynamic Forces acting on Objects in a Moonpool
(Master thesis, 2013)This master thesis describes and discusses an experimental study on the hydrodynamic forces acting on objects in a moonpool, carried out at MARINTEK in 2013. The experiments were done using a simplified 2-dimensional ... -
Experimental Testing of Cabrinha Fusion X1300 Foilkit in Towing Tank
(Master thesis, 2021)Denne oppgaven dekker en experimentell studie av et Cabrinha Fusion X1300 foil kit, som benyttes til kiting og surfing. Ettersom det er en eksperimentell oppgave, inneholder den planlegging av eksperiment og testprogram, ... -
Experimental Testing, Dynamic Modeling and Control of Roll and Pitch for a SES with a Split Cushion
(Master thesis, 2019)Denne masteroppgaven undersøker egenskapene for rull og trim demping til et overflateffektskip med en luftpute som er delt inn i fire separate putekamre. Denne nye puteinndelingen gjør det mulig å generere et motvirkende ... -
Experimental tests and numerical calculations of replenishment at sea
(Master thesis, 2010)Experimental tests and numerical calculations of replenishment at sea operations for two Fridtjof Nansenclass frigates have been performed. A Fridtjof Nansen-class frigate has been model with the use of empirical formulas ... -
Experimental Validation and Design Review of Wave Loads on Large-Diameter Monopiles
(Master thesis, 2015)The objective of the thesis work was to explore challenges related to ULS wave loading on offshore wind turbines, with special emphasis on large-diameter inertia-dominated monopile foundations. Experimental studies testing ... -
Experimental validation of a time-domain approach for determining sectional loads in a floating wind turbine hull subjected to moderate waves
(Journal article; Peer reviewed, 2017)To achieve cost-effective and reliable structural design of floating wind turbines, efficient and accurate time domain numerical approaches are required to analyse structural responses in design conditions, e.g. wind and ... -
Experimental Validation of Angular Velocity Measurements for Wind Turbines Drivetrain Condition Monitoring
(Chapter, 2019)Drivetrain bearings are seen as the most common reason of the wind turbine drivetrain system failures and the consequent downtimes. In this study, the angular velocity error function is used for the condition monitoring ... -
Experimental validation of attitude and rate-sensor bias filter using range-difference measurements
(Peer reviewed; Journal article, 2018)This paper considers the problem of constructing a filter for estimating attitude and rate-sensor bias, that has both proven stability and close-to-optimal performance with respect to noise. The filter is based on measuring ...