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Rozprawy doktorskie na temat „Floating structures”

Autor: Grafiati
Data publikacji: 4 czerwca 2021
Data aktualizacji: 25 lipca 2025

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1

Richardson, Mark Damian. "Dynamically installed anchors for floating offshore structures." University of Western Australia. School of Civil and Resource Engineering, 2008. http://theses.library.uwa.edu.au/adt-WU2008.0230.

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The gradual depletion of shallow water hydrocarbon deposits has forced the offshore oil and gas industry to develop reserves in deeper waters. Dynamically installed anchors have been proposed as a cost-effective anchoring solution for floating offshore structures in deep water environments. The rocket or torpedo shaped anchor is released from a designated drop height above the seafloor and allowed to penetrate the seabed via the kinetic energy gained during free-fall and the anchor’s self weight. Dynamic anchors can be deployed in any water depth and the relatively simple fabrication and insta
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2

Nobakhti, Abbas. "Articulations in floating arrays." Thesis, University College London (University of London), 2001. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.251819.

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Fitzgerald, Colm J. "Time-domain simulations for floating structures." Thesis, Loughborough University, 2009. https://dspace.lboro.ac.uk/2134/14475.

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In this thesis numerical and analytical investigations of wave-structure interactions are conducted within the linearised theory of water waves. The primary objective of the thesis was to develop a numerical time-domain solution method capable of simulating wave-structure interactions in three-dimensions involving axisymmetric structures. Although the solution method was developed for three-dimensional problems, many two-dimensional interactions were also simulated using an existing time-domain solution method. The numerical method for obtaining the solution of the time-domain water wave probl
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4

Lubbad, Raed Khalil. "Some Aspects of Arctic Offshore Floating Structures." Doctoral thesis, Norges teknisk-naturvitenskapelige universitet, Institutt for bygg, anlegg og transport, 2011. http://urn.kb.se/resolve?urn=urn:nbn:no:ntnu:diva-12334.

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The present work highlights some aspects related to the analyses of Arctic offshore floating structures. This thesis consists of five papers, which can be divided into two main categories. One category deals with the dynamics of slender structures with an emphasis on the prediction and suppression of vortex induced vibrations (VIV), and the other category examines the process of interaction between sloping structures and sea ice with focus on developing a numerical model to simulate this process in real time. Slender structures, such as mooring lines and marine risers, are very important for
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5

Kathiroli, S. "Optimisation of members of floating offshore structures." Thesis, University of Liverpool, 1988. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.235703.

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6

Carter, Benjamin. "Water-wave propagation through very large floating structures." Thesis, Loughborough University, 2012. https://dspace.lboro.ac.uk/2134/12031.

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Proposed designs for Very Large Floating Structures motivate us to understand water-wave propagation through arrays of hundreds, or possibly thousands, of floating structures. The water-wave problems we study are each formulated under the usual conditions of linear wave theory. We study the frequency-domain problem of water-wave propagation through a periodically arranged array of structures, which are solved using a variety of methods. In the first instance we solve the problem for a periodically arranged infinite array using the method of matched asymptotic expansions for both shallow and de
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Zhang, Yahui. "Response statistics of a floating vessel in spreading seas." Thesis, University of Cambridge, 2010. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.609145.

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Lui, Tin-pak. "Modular floating factory experimental offshore building components prefabrication /." Click to view the E-thesis via HKUTO, 2004. http://sunzi.lib.hku.hk/hkuto/record/B31987205.

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Mazaheri, Said. "Response based analysis of an FPSO due to arbitrary wave, wind and current loads." Thesis, University of Newcastle upon Tyne, 2003. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.289168.

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Ngai, Siu-kit Joanna. "Floating outdoor museum : journey through the historical path of Macau /." View the Table of Contents & Abstract, 2005. http://sunzi.lib.hku.hk/hkuto/record/B34613626.

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11

Fernandez, Rodriguez Emmanuel. "Analysis of floating support structures for marine and wind energy." Thesis, University of Manchester, 2015. https://www.research.manchester.ac.uk/portal/en/theses/analysis-of-floating-support-structures-for-marine-and-wind-energy(f4870ce2-b8b5-4c7e-ba7e-f91a1d3c4bc9).html.

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Bed connected support structures such as monopiles are expected to be impractical for water depths greater than 30 m and so there is increasing interest in alternative structure concepts to enable cost-effective deployment of wind and tidal stream turbines. Floating, moored platforms supporting multiple rotors are being considered for this purpose. This thesis investigates the dynamic response of such floating structures, taking into account the coupling between loading due to both turbulent flow and waves and the dynamic response of the system. The performance and loading of a single rotor in
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12

Sönmez, Nurcan. "Investigating Wind Data and Configuration of Wind Turbines for a Turning Floating Platform." Thesis, KTH, Mekanik, 2014. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-148957.

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Wake interactions on a floating platform for offshore wind energy applications were investigated.The study is performed in collaboration with Hexicon AB which has a patent family for innovative floating platforms, which are able to turn automatically. The Jensen model is used for wake effect calculations and the simulations were performed in MATLAB. The present study starts with wind speed and wind direction data analysis for the specific site that Hexicon AB plans to construct its first platform. Data analysis is followed by wake interaction studies for H4-24MW type Hexicon AB platform. Wake
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13

Nwogu, Okey. "Analysis of fixed and floating structures in random multi-directional waves." Thesis, University of British Columbia, 1989. http://hdl.handle.net/2429/29255.

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Offshore structures have traditionally been designed on the assumption of long-crested or uni-directional incident waves. Realistic sea states are however short-crested or multidirectional with a distribution of wave energy over both frequency and direction. The present thesis investigates the influence of the directional spreading of wave energy on the forces on fixed structures and motions of floating structures. The work is both theoretical and experimental, with the experiments carried out at the multi-directional wave basin of the Hydraulics Laboratory at the National Research Council in
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14

Wong, Yanyi Liu. "Adaptation in standard CMOS processes with floating gate structures and techniques." College Park, Md. : University of Maryland, 2007. http://hdl.handle.net/1903/6788.

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Thesis (Ph. D.) -- University of Maryland, College Park, 2007.<br>Thesis research directed by: Electrical Engineering. Title from t.p. of PDF. Includes bibliographical references. Published by UMI Dissertation Services, Ann Arbor, Mich. Also available in paper.
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15

Paci, Agnese <1989&gt. "Numerical analysis of floating structures for off-shore and harbour engineering." Doctoral thesis, Alma Mater Studiorum - Università di Bologna, 2018. http://amsdottorato.unibo.it/8556/1/Paci_Agnese_tesi.pdf.

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The aim of the research was to create an open source numerical model able to simulate every kind of harbour and offshore structure, fixed and floating. The code implemented was able to reproduce a physical wave tank and can be used during the design phase as an integration to physical tests. OpenFOAM was used as a starting point to develop the new code, furthermore the boundary condition IHFOAM tool was applied to generate and absorb waves. In order to reproduce deep water conditions, the code was improved with new boundary conditions and a new turbulent model. Furthermore an additional numer
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16

Fakher, Sundes Juma. "Advanced study of pentacene-based organic memory structures." Thesis, Bangor University, 2014. https://research.bangor.ac.uk/portal/en/theses/advanced-study-of-pentacenebased-organic-memory-structures(5319a571-2c4c-4f90-a26c-fa5e7da82cfb).html.

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A systematic approach has been used to optimise the fabrication process of pentacene-based nonvolatile organic thin film memory transistors (OTFMTs) operating at low programming voltages. In the first part of this work, reliable, reproducible and hysteresis free organic metal-insulator-semiconductor (OMIS) devices and organic thin film transistors (OTFTs) were fabricated and characterised. All devices were based on poly(methyl methacrylate) (PMMA) and poly(vinyl phenol) (PVP) as the organic insulators. The second part of this work focused on optimising the evaporation parameters to fabricate h
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17

Lui, Tin-pak, and 雷天柏. "Modular floating factory: experimental offshore building components prefabrication." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 2004. http://hub.hku.hk/bib/B31987205.

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18

Vivekanandhan, Bagya. "Analysis on experimental and numerical modelling of floating structures using cfd codes." Master's thesis, Alma Mater Studiorum - Università di Bologna, 2020.

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This research is focused on the study and analysis of dynamics of floating bodies. The research is carried out in two stages, an experimental process followed by a numerical process. At the first stage, Experimental tests were performed in the wave flume of the Laboratory of Hydraulic Engineering at DICAM, University of Bologna. Two prototypes of floating bodies, a cylinder and a barge, were tested for catenary and spring mooring systems under regular and irregular wave conditions. For each tested wave, the wave-structure interaction was measured by means of wave gauges and the dynamic motion
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19

Yan, Shiqiang. "Numerical simulation of nonlinear response of moored floating structures to steep waves." Thesis, City University London, 2006. http://openaccess.city.ac.uk/8501/.

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This thesis presents a newly developed Quasi Arbitrary Lagrangian-Eulerian Finite Element Method (QALE-FEM) for numerically simulating wave-body interaction problems based on the fully nonlinear potential theory. The boundary value problem in this model is solved by a finite element method (FEM). The main difference between this method and the conventional FEM is that the complex mesh is generated only once at the beginning of the calculation and is moved at all other time steps in order to conform to the motion of the free surface and structures. This feature allows one to use an unstructured
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20

Kazemi, Saeid. "Air gap response and potential deck impact analysis of floating offshore structures." Thesis, University of Newcastle Upon Tyne, 2007. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.435637.

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21

Aliyar, Sithik. "Extreme wave interaction with fixed and floating structures using hybrid coupling approach." Electronic Thesis or Diss., Ecole centrale de Nantes, 2022. http://www.theses.fr/2022ECDN0047.

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La thèse vise à étudier l’efficacité et la précision des solveurs NS et SWENSE pour simuler des structures fixes et flottantes. Les deux solveurs sont basés sur OpenFOAM et sont couplés indépendamment avec HOS pour la générationd’onde en termes de domaine et d’approche de décomposition fonctionnelle. Les solveurs sont testés pour trois applications. Les première et deuxième applications présentent l’interaction d’ondes de focalisation avec des cylindresfixes et mobiles et la troisième est l’interaction d’ondes régulières et irrégulières avec la sousstructure de type OC3 Hywind SPAR. Les méthod
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22

Roth, Sherin. "THE POTENTIAL OF WATER - A CITY PLANNING PROJECT EXPLORING THE POSSIBILITIES OF FLOATING STRUCTURES." Thesis, KTH, Arkitektur, 2021. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-298811.

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This project investigates the possibilities of building on water as a way to add valuable land to dense cities. By utilizing floating structures, I have made a proposal for a new city district on the water outside of Fisksätra, a suburb located 30 minutes east of Stockholm. My ambition was to create a diverse and lively area with business and dwellings that cater to people in all stages of life. The proposal stretches along the western coast of Fisksätra creating a connection between the center of the suburb and a neighboring town as well as making that stretch of the coast accessible for the
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23

Yaghin, Mohammad Ali Lotfollahi. "Joint probabilities of responses to wave induced loads on monohull floating offshore structures." Thesis, Heriot-Watt University, 1996. http://hdl.handle.net/10399/687.

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24

Ngai, Siu-kit Joanna, and 魏小潔. "Floating outdoor museum: journey through the historical path of Macau." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 2005. http://hub.hku.hk/bib/B4500965X.

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25

Lau, S. M. "3D hydrodynamic analysis of first and second order forces on free floating structures with forward speed." Thesis, University of Newcastle Upon Tyne, 1987. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.378314.

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26

Crema, Ilaria [Verfasser], and Hocine [Akademischer Betreuer] Oumeraci. "Oscillating water column wave energy converters integrated in very large floating structures / Ilaria Crema ; Betreuer: Hocine Oumeraci." Braunschweig : Technische Universität Braunschweig, 2018. http://d-nb.info/1175815357/34.

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CRIPE, BENJAMIN IAN. "ENERGY OF THE SEA: AN OFFSHORE MARINE RESEARCH FACILITY." University of Cincinnati / OhioLINK, 2007. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1179168023.

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28

Douteau, Louis. "CFD simulation with anisotropic mesh adaptation : application to floating offshore wind turbines." Thesis, Ecole centrale de Nantes, 2020. http://www.theses.fr/2020ECDN0003.

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Le calcul des performances et des efforts appliqués sur une éolienne offshore est actuellement réalisé à l'aide d’outils basés sur des approches quasi-statiques. Ces approches sont intéressantes pour leur vitesse de calcul, elles sont cependant perfectibles suivant la méthode de mise en oeuvre et suivant les cas de chargement étudiés. Une approche alternative consiste à utiliser la modélisation CFD. Cette thèse s’intéresse à des méthodes d’une haute précision, ayant le potentiel de fournir des écoulements et efforts précis. La plateforme logicielle hautement parallélisée ICI-tech est utilisée
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29

Zhang, Jian. "Hydrodynamic behavior of packed-bed reactors on a floating platform : liquid distribution and drainage dynamics." Doctoral thesis, Université Laval, 2021. http://hdl.handle.net/20.500.11794/68634.

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Pour combler l'écart entre l'augmentation de la demande énergétique et l'épuisement de la production d'hydrocarbures onshore, l'exploitation des hydrocarbures offshore est de plus en plus envisagée, en particulier les gisements de gaz / pétrole dans les eaux plus profondes. En attendant, un grand nombre d'unités de traitement déployées pour la production d'hydrocarbures doivent respecter les contraintes environnementales conçues pour la protection maritime. Les systèmes tels que les réacteurs et les épurateurs à lit fixe embarqués deviennent inévitablement l'une des options les plus prometteus
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Motamed, Dashliborun Amir. "Performance of multiphase packed-bed reactors and scrubbers on offshore floating platforms: hydrodynamics, chemical reaction, CFD modeling and simulation." Doctoral thesis, Université Laval, 2018. http://hdl.handle.net/20.500.11794/30439.

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Les systèmes flottants de production, stockage et de déchargement (FPSO) ont été introduits dans les secteurs d'exploitation des hydrocarbures offshore en tant qu'outils facilement déplaçables pour l’exploitation de champs de pétrole et de gaz de petites ‘a moyenne tailles ou lorsque ceux-ci sont éloignés des côtes ou en eaux profondes. Ces systèmes sont de plus en plus envisagés pour les opérations de traitement et de raffinage des hydrocarbures à proximité des sites d'extraction des réservoirs sous-marins en utilisant des laveurs et des réacteurs à lit fixe embarqués. De nombreuses études da
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31

Ebrahimi, Ali. "Effect analysis of Reliability, Availability, Maintainability and Safety (RAMS ) Parameters in design and operation of Dynamic Positioning (DP) systems in floating offshore structures." Thesis, KTH, Industriell produktion, 2010. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-102787.

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The objective of this thesis is to identify, which hazards and failures in operation process will affect Reliability, Availability, Maintainability and Safety of floating offshore structures. The focus is on Dynamic Positioning (DP) system that has the responsibility of keeping the offshore structure in the upright position operation. DP system is one of the most critical subsystems on these types of structures in terms of safety of operation and failure risk costs. Reliability of the system in this thesis has been analyzed in qualitative and quantitativeb methods. In qualitative method to fin
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32

Páleník, Branislav. "Návrh plovoucí betonové konstrukce." Master's thesis, Vysoké učení technické v Brně. Fakulta stavební, 2014. http://www.nusl.cz/ntk/nusl-226747.

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The project aimed to familiarize yourself with the issue of floating structures, according to the procurement documents and knowledge acquired during studie, a study of existing floating structures. Review was conducted design adapted from documents. More space was devoted bottom structure in the assessment. Other structures designed only provisionally.
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33

Bocchi, Edoardo. "Compressible-incompressible transitions in fluid mechanics : waves-structures interaction and rotating fluids." Thesis, Bordeaux, 2019. http://www.theses.fr/2019BORD0279/document.

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Ce manuscrit porte sur les transitions compressible-incompressible dans les équations aux dérivées partielles de la mécanique des fluides. On s'intéresse à deux problèmes : les structures flottantes et les fluides en rotation. Dans le premier problème, l'introduction d'un objet flottant dans les vagues induit une contrainte sur le fluide et les équations gouvernant le mouvement acquièrent une structure compressible-incompressible. Dans le deuxième problème, le mouvement de fluides géophysiques compressibles est influencé par la rotation de la Terre. L'étude de la limite à rotation rapide montr
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34

Leroy, Vincent. "Aérodynamique instationnaire pour l'analyse de la tenue à la mer des éoliennes flottantes." Thesis, Ecole centrale de Nantes, 2018. http://www.theses.fr/2018ECDN0050/document.

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La simulation numérique des éoliennes flottantes est essentielle pour le développement des Energies Marines Renouvelables. Les outils de simulation classiquement utilisés supposent un écoulement stationnaire sur les rotors. Ces théories sont généralement assez précises pour calculer les forces aérodynamiques et dimensionner les éoliennes fixes (à terre ou en mer) mais les mouvements de la plateforme d’une éolienne flottante peuvent induire des effets instationnaires conséquents. Ceux-ci peuvent par exemple impacter la force de poussée sur le rotor. Cette thèse de doctorat cherche à comprendre
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Molwantwa, Jennifer Balatedi. "Floating sulphur biofilms structure, function and biotechnology." Thesis, Rhodes University, 2008. http://hdl.handle.net/10962/d1004017.

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Mine wastewaters generated during active production operations, and decanting streams following mine closure have major environmental impacts, and volumes requiring treatment are expected to increase substantially as the South African mining industry matures. Biological treatment of mine waters has been the subject of increasing interest, where sulphate reducing bacteria are employed for the reduction of sulphate to sulphide, precipitation of metals and the production of alkalinity. However, the sulphide if not removed from the system can be oxidised back to sulphate. As a result there have be
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36

Pinkiewicz, T. "Design of a 32-bit Arithmetic Unit based on Composite Arithmetic and its Implementation on a Field Programmable Gate Array." Thesis, Honours thesis, University of Tasmania, 1999. https://eprints.utas.edu.au/584/1/Honours_Thesis.pdf.

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As we advance into the new century, computers of the future will require new techniques for arithmetic operations, which take advantage of the modern technology and yield accurate results. Floating-point arithmetic has been in use for nearly forty years, but is plagued with inaccuracies and limitations which necessitate introduction of a new concept in computer arithmetic, called Composite Arithmetic. Composite Arithmetic combines fixed-point and floating-point arithmetic into one integrated concept where numbers are automatically assigned the right form. This negates the need for diffe
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37

Nematbakhsh, Ali. "A Nonlinear Computational Model of Floating Wind Turbines." Digital WPI, 2013. https://digitalcommons.wpi.edu/etd-dissertations/170.

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The dynamic motion of floating wind turbines is studied using numerical simulations. Floating wind turbines in the deep ocean avoid many of the concerns with land-based wind turbines while allowing access to strong stable winds. The full three-dimensional Navier-Stokes equations are solved on a regular structured grid, using a level set method for the free surface and an immersed boundary method for the turbine platform. The tethers, the tower, the nacelle and the rotor weight are included using reduced order dynamic models, resulting in an efficient numerical approach which can handle nearly
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Kattoua, Khaled. "Floating production storage offloading unit structural fatigue analysis." Thesis, City University London, 2003. http://openaccess.city.ac.uk/7657/.

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This thesis examines the fatigue behaviour of FPSO structures. It has been compiled as a result of theoretical, analytical and experimental study. The Finite Element approach has been utilized to analyse the FPSO's structure. It is intended that this particular work will enable further computer simulations for fatigue assessment to be carried out. The thesis starts with the development of the general arrangement, structure and typical details of the City FPSO. The applied loads are then reviewed and this includes the so called static loads due to cargo loading and still water pressure, and the
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Gilfillan, Joanne Criseyde. "The structure and microbiology of floating sulphide oxidising biofilms." Thesis, Rhodes University, 2000. http://hdl.handle.net/10962/d1003962.

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Floating sulphur biofilms are observed as surface layers in numerous aquatic sulphide-rich environments, and apparently play an important role in the cycling of sulphur in its various oxidation states. In addition to the conversion of sulphide to sulphur and/or sulphate species, it has been suspected that subsequent reduction back to sulphide may occur within the floating sulphur biofi1m in organic-rich environments. The use of sulphur biofilms for the harvesting of elemental sulphur from wastewater treatment systems has also been suggested. There is, however, little documented information in
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40

Ercolanelli, Julien. "Étude numérique et expérimentale d'un système couplé stabilisateur et récupérateur d'énergie des vagues Experimental and numerical investigation of sloshing in anti-roll tank using effective gravity angle Experimental and numerical assessment of the performance of a new type passive anti-roll stabilisation system." Thesis, Brest, École nationale supérieure de techniques avancées Bretagne, 2019. http://www.theses.fr/2019ENTA0008.

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Le développement de Geps Techno est basé sur un concept innovant de structure flottante destinée à produire de l'énergie électrique à partir de plusieurs sources d'énergies marines renouvelables dont la source houlomotrice. Le système houlomoteur développé par Geps Techno repose sur la mise en circulation d'eau et la création d'un tourbillon en son sein. En profitant du phénomène de carène liquide, le concept est également déclinable en un système de stabilisation de navire ou de toute autre plateforme flottante. L'objectif à court terme de la société est le développement de cette technologie
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41

Spraul, Charles. "Suivi en service de la durée de vie des ombilicaux dynamiques pour l’éolien flottant." Thesis, Ecole centrale de Nantes, 2018. http://www.theses.fr/2018ECDN0007/document.

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Le travail présenté vise à mettre en place une méthodologie pour le suivi en service de la fatigue mécanique pour l’ombilical dynamique d’un système EMR flottant. L’approche envisagée consiste à simuler à l’aide d’outils numériques la réponse de l’ombilical aux cas de chargement observés sur site. Le post-traitement des résultats de ces simulations devant permettre d’accéder à différentes quantités d’intérêt en tout point du câble. Pour quantifier et réduire l’incertitude sur la réponse calculée de l’ombilical ce dernier doit être instrumenté. Un certain nombre de paramètres du modèle numériqu
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42

Pham, Hong-Duc. "Modélisation et Suivi en Service des Lignes d’Ancrages des Éoliennes Flottantes." Thesis, Ecole centrale de Nantes, 2019. http://www.theses.fr/2019ECDN0030.

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On propose dans ce travail une méthodologie pour le suivi en service des lignes d'ancrage des éoliennes flottantes. Tout d’abord, une expression empirique de la raideur dynamique d'un câble en nylon est obtenue à partir des données d'essais dans la littérature. Une procédure pratique de modélisation est proposée en tenant compte de la raideur axiale dynamique non-linéaire des câbles en nylon. La deuxième partie est consacrée à la prédiction de la durée de vie des lignes d’ancrages. Des méthodes avancées pour l’analyse de fatigue dans le domaine fréquentiel et la simulation des réponses non-lin
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Di, Pietro Joshua (Joshua Michael). "Structural analysis and design of floating wind turbine systems." Thesis, Massachusetts Institute of Technology, 2009. http://hdl.handle.net/1721.1/50575.

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Thesis (S.M. in Mechanical Engineering and Naval Architecture and Marine Engineering)--Massachusetts Institute of Technology, Dept. of Mechanical Engineering, 2009.<br>Includes bibliographical references (p. 139-140).<br>As oil supply rates approach potential maximums and the global detrimental effects of carbon emitting energy technology are becoming more comprehensively understood, the world is searching for environmentally benign energy technology which can be reliably and economically harvested. Deep water offshore wind is a vast, reliable and potentially economical energy source which rem
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Hacene-Djaballah, Nouri. "Floating floor attenuation of impact structure-borne sound in timber construction." Fairfax, VA : George Mason University, 2009. http://hdl.handle.net/1920/4598.

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Thesis (M.S.)--George Mason University, 2009.<br>Vita: p. 42. Thesis director: Girum Urgessa. Submitted in partial fulfillment of the requirements for the degree of Master of Science in Civil, Environmental, and Infrastructure Engineering. Title from PDF t.p. (viewed Oct. 12, 2009). Includes bibliographical references (p. 39-41). Also issued in print.
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Robinson, Nigel James. "The wind induced vibration and fatigue of floating roofs on oil storage tanks." Thesis, University of Cambridge, 1990. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.335158.

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Arnal, Vincent. "Modélisation expérimentale d'une éolienne flottante par une approche "sofware-in-the-loop"." Thesis, Ecole centrale de Nantes, 2020. http://www.theses.fr/2020ECDN0037.

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Les outils de calcul actuels pour la modélisation numérique multi-physique (vent, vagues, courant, etc.) d’une éolienne flottante ont besoin de validations par des campagnes expérimentales. L’objectif de ce travail est le développement et la validation d’un dispositif expérimental dédié aux essais en bassin à houle d’une éolienne flottante, en se concentrant sur la représentation des efforts du vent. Pour cela, une approche hybride combinant modélisations physique et numérique est développée, appelée “software-in-the-loop” (SIL). Le développement des différentes briques composant un système SI
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Bussolati, Federico. "Modèle multi-échelle de la fatigue des lignes d’ancrage câblées pour l’éolien offshore flottant." Thesis, Université Paris-Saclay (ComUE), 2019. http://www.theses.fr/2019SACLN041/document.

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La fonction principale des systèmes d'ancrage des éoliennes offshore flottantes est de limiter les mouvements du support. Les lignes d'ancrage qui les composent sont typiquement constituées de chaînes, de câbles aciers, de câbles synthétiques ou d'une combinaison de ces composants.Dans cette thèse, on se concentre sur les câbles en acier qui permettent de réduire le poids et d'augmenter la résistance en tension par rapport aux chaînes. Leur dimensionnement dépend des chargements en tension et flexion, liés aux mouvements du flotteur sous l'action de la mer et du vent.L'objectif de la thèse est
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Auckett, Josie Elise. "Structural and physical studies of oxide ionic-conductive brownmillerite single crystals." Thesis, The University of Sydney, 2015. http://hdl.handle.net/2123/13668.

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Large single crystals of brownmillerites in the Sr2(Fe,Co,Al)2O5 and Ca2(Fe,Co,Al)2O5 compositional triangles were grown using the floating-zone (FZ) method. A commensurate modulation with Pbma symmetry was identified in Sr2FeCoO5 for the first time and confirmed in Sr2Fe2O5 and Ca2FeCoO5, while Ca2FeAlO5 and Ca2(Fe0.95Zn0.05)2O5 adopted different unmodulated structures at room temperature, in agreement with previous reports. The Pbma phases persisted to very high temperatures (≤750 °C) in all cases, indicating negligible thermal disordering of the chain orientations. Electron diffraction imag
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Mancilla, Alarcón Cristhian A. "Hydrodynamic loadings and responses of a floating guardwall a fluid-structure interaction problem /." Master's thesis, Mississippi State : Mississippi State University, 2005. http://library.msstate.edu/content/templates/?a=72.

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Mancilla, Alarcon Cristhian Abelardo. "Hydrodynamic Loadings and Responses of a Floating Guardwall: A Fluid-Structure Interaction Problem." MSSTATE, 2005. http://sun.library.msstate.edu/ETD-db/theses/available/etd-04052005-152645/.

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The hydrodynamic pressures acting on a floating guardwall can be considered to be a fluid-structure interaction problem. In this research, the fluid-structure system is decoupled assuming that the effects of the structural response on the fluid load pattern are negligible. Therefore, initially, the effects of the flow and pressure distribution, due to the presence of the structure, were computed and then used as boundary conditions for the structural analysis of the guardwall. The deformation of the guardwall was then used to recompute the fluid loads. Because the fluid loading did not change
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