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Tesis sobre el tema "Offshore structures"

Autor: Grafiati

Publicado: 4 de junio de 2021

Última modificación: 25 de julio de 2025

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1

Adedipe, Oyewole. "Integrity of offshore structures." Thesis, Cranfield University, 2015. http://dspace.lib.cranfield.ac.uk/handle/1826/9692.

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Corrosion and fatigue have been dominant degradation mechanisms in offshore structures, with the combination of the two, known as corrosion fatigue, having amplified effects in structures in the harsh marine environments. Newer types of structure are now being developed for use in highly dynamic, harsh marine environments, particularly for renewable energy applications. However, they have significantly different structural details and design requirements compared to oil and gas structures, due to the magnitude and frequency of operational and environmental loadings acting on the support struct

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2

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 anchors self weight. Dynamic anchors can be deployed in any water depth and the relatively simple fabrication and insta

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3

Abdolmaleki, Kourosh. "Modelling of wave impact on offshore structures." University of Western Australia. School of Mechanical Engineering, 2007. http://theses.library.uwa.edu.au/adt-WU2008.0055.

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[Truncated abstract] The hydrodynamics of wave impact on offshore structures is not well understood. Wave impacts often involve large deformations of water free-surface. Therefore, a wave impact problem is usually combined with a free-surface problem. The complexity is expanded when the body exposed to a wave impact is allowed to move. The nonlinear interactions between a moving body and fluid is a complicated process that has been a dilemma in the engineering design of offshore and coastal structures for a long time. This thesis used experimental and numerical means to develop further underst

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4

Segreti, John Michael. "Fatigue analysis methods in offshore structural engineering." Thesis, Georgia Institute of Technology, 1991. http://hdl.handle.net/1853/19287.

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5

Pouliquen, Patricia. "La condition des travailleurs de l’off-shore." Brest, 1993. http://www.theses.fr/1993BRES5001.

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Le but de cette thèse a été de présenter la condition juridique et la protection sociale des travailleurs de l'offshore. Ainsi, dans une première partie, il a été examiné les protagonistes de la relation contractuelle à savoir l'employeur aux visages multiples et le salarié au statut ambivalent : certains personnels ont le statut de marin, d'autres sont des travailleurs terrestres, le plongeur connaît également un statut particulier. Ce statut particulier s'explique par le lieu de travail original de ces personnels : les structures offshore dont les variétés sont les plus diverses. Il a égalem

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6

Ghadimi, R. "Nonlinear dynamic analysis of offshore structures." Thesis, Cranfield University, 1986. http://hdl.handle.net/1826/3581.

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In this thesis consideration is given to a selection of nonlinear dynamic problems in the field of offshore engineering. Hydrodynamic loading on fixed horizontal and vertical tubular members and the dynamic response of articulated towers together with the distribution of shear force and bending moment along the tower are investigated using various wave theories. Effects of nonlinear convective acceleration terms in the calculation of fluid inertia forces and moments are examined and attention is given to integration of wave forces up to the free surface for vertical members. Calculation of flu

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7

Rodriguez-Sanchez, Jose Efrain. "Fatigue crack repair for offshore structures." Thesis, University College London (University of London), 1999. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.313721.

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8

Trim, A. D. "Probabilistic dynamic analysis of offshore structures." Thesis, Cranfield University, 1986. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.376215.

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9

Klepsvik, Jonny. "Nonlinear wave loads on offshore structures." Thesis, Massachusetts Institute of Technology, 1995. http://hdl.handle.net/1721.1/36062.

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10

Schulz, Karl Wayne. "Numerical prediction of the hydrodynamic loads and motions of offshore structures /." Digital version accessible at:, 1999. http://wwwlib.umi.com/cr/utexas/main.

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11

Fuglem, Mark. "Decision-making for offshore resource development." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1997. http://www.collectionscanada.ca/obj/s4/f2/dsk2/ftp02/NQ34246.pdf.

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12

Sadki, Nadia. "Faisabilité de modèles de terrain en offshore." Châtenay-Malabry, Ecole centrale de Paris, 2001. http://www.theses.fr/2001ECAP0711.

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On étudie la faisabilité d'une modélisation numérique de terrain en offshore. Cette modélisation sera basée sur les méthodes géostatistiques. Ces méthodes nécessitant un grand nombre de données, on va tout d'abord s'intéresser à l'échantillonnage des différentes mesures dont on dispose. On évaluera leurs supports (volume de mesure) et on se posera la question du passage d'un support à un autre. On étudiera ensuite la cohérence des données, par rapport à la profondeur, entre elles et par rapport aux paramètres de nature et de compacité. Cette étape sera suivie par une étude stratigraphique, bas

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13

Souissi, Ridha. "Fléxibilité des jonctions tubulaires dans les structures offshore." Paris 6, 1991. http://www.theses.fr/1991PA066640.

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En élasticité linéaire et dans le cadre de l'hypothèse de petites perturbations, on présente dans cette thèse une méthodologie générale permettant la prise en compte lors de l'analyse globale des structures offshore de type jacket du comportement des coques des zones de liaison entre tubes: jonctions tubulaires. Cela revient a prendre en compte la flexibilité ou semi-rigidite de la jonction, considérée comme nulle ou infinie dans une analyse conventionnelle. Une illustration de la méthodologie générale a été faite sur une jonction en t, en procédant de la manière suivante: définition d'un élém

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14

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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15

Foroughi, Abdol Rahim. "Uncertainties in environmental loading on offshore structures." Thesis, University of Sunderland, 1994. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.385010.

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16

Monahan, Craig C. "Early fatigue crack growth in offshore structures." Thesis, University College London (University of London), 1994. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.271908.

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17

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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18

Emmerhoff, Ole Johannes. "The slow drift motions of offshore structures." Thesis, Massachusetts Institute of Technology, 1994. http://hdl.handle.net/1721.1/36503.

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19

Latini, Corazzini Valentina. "Non-linear dynamic analysis of offshore structures." Master's thesis, Alma Mater Studiorum - Università di Bologna, 2009. http://amslaurea.unibo.it/359/.

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20

Reyburn, Elizabeth Maury. "The design of offshore structures using load and resistance factor design." Thesis, Georgia Institute of Technology, 1994. http://hdl.handle.net/1853/19978.

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21

Chau, Fun-pang. "Numerical methods in wave loading of large offshore structures /." [Hong Kong] : University of Hong Kong, 1985. http://sunzi.lib.hku.hk/hkuto/record.jsp?B12315916.

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22

Jester, William Andrew. "Interactive numerical simulation of riser interference phenomena in offshore structures /." Full text (PDF) from UMI/Dissertation Abstracts International, 2000. http://wwwlib.umi.com/cr/utexas/fullcit?p3004297.

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23

Venkataraman, Vijay. "Dynamic Response of a Mobile Offshore Base Hydroelastic Test Model." Fogler Library, University of Maine, 2001. http://www.library.umaine.edu/theses/pdf/VenkataramanV2001.pdf.

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24

周奮鵬 and Fun-pang Chau. "Numerical methods in wave loading of large offshore structures." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 1985. http://hub.hku.hk/bib/B31206797.

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25

Coccon, Marco. "Structural Reliability Analysis of Complex Systems: Applications to Offshore and Composite Structures." Doctoral thesis, Università degli studi di Padova, 2015. http://hdl.handle.net/11577/3424201.

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This thesis aims at developing new methodologies for the reliability analysis of structural systems with applications to offshore and aeronautical fields. In general, sructures of practical interest are complex redundant systems, in which more than one element is required to fail in order to have catastrophic failure. Moreover, ramdomness inherently exists in both material properties and external loads. As a result, complex structural systems are typically characterised by a huge number of possible failure sequences, of which only some are most likely to occour. Therefore, for an efficient ris

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26

Sarkar, Abhijit. "Dynamics of moored offshore structures in random seas." Thesis, University of Oxford, 1998. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.284464.

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27

Walker, Daniel Anthony Guy. "Interaction of extreme ocean waves with offshore structures." Thesis, University of Oxford, 2006. http://ora.ox.ac.uk/objects/uuid:6858dc08-1bd4-4195-8893-1af98d5e68e3.

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With most of the world's untouched oil and gas resources offshore and the possibility that hurricanes are becoming more frequent and more intense, the risks associated with offshore oil and gas production are increasing. Therefore, there is an urgent need to improve current understanding of extreme ocean waves and their interaction with structures. This thesis is concerned with the modelling of extreme ocean waves and their diffraction by offshore structures, with the ultimate aim of proposing improved tools for guiding airgap design. The feasibility of using linear and second order diffractio

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28

Aritenang, Wendy. "Behaviour of composite tubular connections in offshore structures." Thesis, Imperial College London, 1989. http://hdl.handle.net/10044/1/47336.

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29

Kountouris, Ioannis Savvas. "The assessment of weld defects in offshore structures." Thesis, Imperial College London, 1989. http://hdl.handle.net/10044/1/47520.

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30

Liang, Yibo. "Vortex-induced motions of multiple cylindrical offshore structures." Thesis, University of Newcastle upon Tyne, 2018. http://hdl.handle.net/10443/4014.

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Vortex-induced motions (VIM) has been receiving continuous attention in the field of offshore exploration and exploitation as an increasing number of deep-draft floating structures have been operating in different regions around world. Deep-draft floating structures are well known for their favourable vertical motions behaviour compared with other types of floating offshore structures. However, the increases in the structure’s draft can also lead to more severe VIM, which may lead to potential damage particularly causing fatigue to the mooring and riser systems. This research is to carry out a

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31

Cofer, William Franklin. "An analytical determination of ultimate strength of tubular joints for offshore structures." Diss., Georgia Institute of Technology, 1988. http://hdl.handle.net/1853/21494.

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32

Salgado, Francisco Manuel Goncalves Alves. "Analysis procedures for caisson-retained island type structures." Thesis, University of British Columbia, 1990. http://hdl.handle.net/2429/30845.

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This thesis is concerned with the analysis of large offshore gravity structures used for oil exploration and recovery in the Beaufort Sea. Because of the high ice loads and the water depths involved, these structures comprise a large steel box infilled with a sand core for stability. One such structure was subjected to severe ice loading in April 1986 causing portions of the sand core to liquefy and bring the structure to a near failure condition. This structure was heavily monitored and thus serves as a case study against which the proposed analysis procedure can be checked. The behaviour of

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33

McGowan, David. "Ultimate capacity of offshore platform conductor strings." Thesis, Virginia Tech, 1991. http://hdl.handle.net/10919/41703.

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The ultimate capacity of offshore platform conductor strings is studied. The unique way in which conductors are loaded is described and the various design methods that exist are presented. Previous research in the field of tubular member behavior is also reviewed. The results of seven experimental tests are evaluated and compared with the existing conductor design criteria. The test matrix calls for various amounts of lateral loading to be imposed on the conductor system. Axial load, applied to simulate the weight of inner casings, is then applied until failure. Results indicate that inter

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34

Mohamad, Basim I. "Thermal instability of infinitely-long structures." Thesis, University of Westminster, 1994. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.386149.

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35

Cheung, Kwok Fai. "Hydrodynamic interactions between ice masses and large offshore structures." Thesis, University of British Columbia, 1987. http://hdl.handle.net/2429/26686.

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The objective of the work described in this thesis is to evaluate the significance of the ambient fluid on the motion of an ice mass in the vicinity of an offshore structure and during the subsequent impact mechanism. Models for iceberg drift are first reviewed. The changes in flow field around an ice mass drifting in a current near an offshore structure are investigated by potential flow theory. The proximity effects and current interactions are generalized by introducing the added mass and convective force coefficients for the ice mass. A two-dimensional numerical model based on the boundar

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36

Sakamoto, Takashi. "Nonlinear static and dynamic analysis of flexible risers subjected to vortex excitation." Thesis, Imperial College London, 1994. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.309379.

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37

Tang, Zifan. "One-dimensional mechanistic modelling of gas-liquid two phase flow in pipes." Thesis, Imperial College London, 1991. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.284815.

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38

Hardy, Noel. "Parallel computing in marine technology." Thesis, University of Newcastle Upon Tyne, 1993. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.357632.

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39

Batt, C. "Optimising cathodic protection requirements for high strength steels in the marine environment." Thesis, Cranfield University, 2000. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.323886.

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40

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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41

Olowe, Adedayo Christianah. "Corrosion assessment and cathodic protection design parameters for steel structures in deep and ultra deep offshore waters." Thesis, University of Aberdeen, 2013. http://digitool.abdn.ac.uk:80/webclient/DeliveryManager?pid=201965.

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Carbon steel finds much application for use in industries including civil; manufacturing; oil and gas; as well as, renewable energy. Common examples for usage of steel include water pipelines; oil pipelines; bridges; etc. The main advantages of steel over other engineering materials are its strength and affordability. However, steel undergoes corrosion which is a degradation mechanism that occurs as a result of the electrochemical interaction between steel and its environment. There are two main options to control corrosion, aside from material selection techniques, namely, the use of protecti

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42

Rguig, Mustapha. "Méthodologie des surfaces de réponse pour l'analyse en fiabilité des plates-formes pétrolières offshore fissurées." Nantes, 2005. http://www.theses.fr/2005NANT2044.

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Durant les années 70, un grand nombre de structures offshore de type jacket, treillis, composées de joints tubulaires soudés, ont été implantées. Certaines d'entre elles présentent une réserve importante de résistance malgré les défaillances locales observées. L'objectif de ce travail de recherche est l'examen de l'impact des fissures traversantes. L'idée est de développer des surfaces de réponse physiques introduisant le chargement aléatoire de la houle et la géométrie aléatoire de la fissure. On choisit de modéliser au niveau global l'effet d'une fissure traversante en utilisant un critère d

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43

El-Gharbawy, Sherif Lotfy. "The pullout capacity of suction caisson foundations /." Digital version accessible at:, 1998. http://wwwlib.umi.com/cr/utexas/main.

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44

Amundsen, Morten. "Dynamic Analysis of Offshore Concrete Structures subjected to Earthquake." Thesis, Norges teknisk-naturvitenskapelige universitet, Institutt for konstruksjonsteknikk, 2012. http://urn.kb.se/resolve?urn=urn:nbn:no:ntnu:diva-19005.

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This thesis attempts to study the dynamic response of offshore concrete structures by sequentially introducing physical phenomena which are related to those types of analyses. This is done by modelling a simplified part of a typical offshore concrete structure, with the purpose of establishing a reference case, on which more advanced analyses can be based, as well as evaluate simplified approaches that serve to shorten the analysis time.To establish characteristic earthquakes for the selected return periods of 475, 1000, 3000 and 10 000 years, a seismic hazard analysis is performed for an area

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45

Shetty, Navilkumar. "System reliability of fixed offshore structures under fatigue deterioration." Thesis, Imperial College London, 1992. http://hdl.handle.net/10044/1/7581.

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46

Helmy, Amr Ibrahim I. "Behaviour of offshore reinforced concrete structures under hydrostatic pressure." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1998. http://www.collectionscanada.ca/obj/s4/f2/dsk3/ftp04/nq35181.pdf.

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47

Kimura, Fumiaki. "Probabilistic Design of Steel Structures Applied to Offshore Pipelines." Thesis, Imperial College London, 2009. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.511814.

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48

Santa, Maria Paulo Eduardo Lima de. "Behaviour of footings for offshore structures under combined loads." Thesis, University of Oxford, 1988. http://ora.ox.ac.uk/objects/uuid:50fb3d35-90b3-4685-9ace-0ec5a50014df.

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The lack of knowledge about the behaviour of footings for jack-up rigs under storm loads poses a design problem which can be tackled by model testing. The areas of prime concern are the ultimate loads on footings under combined loading, which affects the safety of the rig, and the rotational stiffness, which affects the interaction between the foundation and the structure. A programme of loading tests was performed on model footings on clay, and was divided into two stages: monotonic loading and cyclic loading. The clay samples were obtained by consolidating Speswhite kaolin slurry in cylindri

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49

Ohl, Clifford Owen Groome. "Free surface disturbances and nonlinear runup around offshore structures." Thesis, University of Oxford, 2000. http://ora.ox.ac.uk/objects/uuid:320ff8da-c225-40da-a7dd-d6cf55c97b51.

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Diffraction of regular waves, focused wave groups, and random seas by arrays of vertical bottom mounted circular cylinders is investigated using theoretical, computational, and experimental methods. Free surface elevation η is the defining variable used to test the potential theory developed. In addition, the nonlinearity of focused wave groups is investigated through the Creamer nonlinear transform and analysis of numerical wave tank data. Linear focused wave group theory is reviewed as a method for predicting the probable shape of extreme events from random wave spectra. The Creamer nonlinea

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50

Janardhanan, K. "The dynamics of flexible offshore structures in irregular seaways." Thesis, University of Southampton, 1992. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.385096.

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