Lubbad, Raed Khalil

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...

Whittaker, D.

The seismic performance of concrete offshore gravity platforms is investigated. Aspects of dynamic structural analysis are discussed with particular reference to offshore gravity platforms, including soil-structure and water-structure interaction. Results of a seismic hazard analysis using currently available information are presented, and appropriate acceleration response spectra for design purposes are suggested. Site response effects are examined to investigate whether seismic hazard analysis...

Roberts, Abigail Mary

The attitudes of employees are key for ensuring the productivity and sustainability of an organisation. The present research aimed to explore obstacles and facilitators of positive team functioning in an offshore environment. Preliminary identification of obstacles and challenges to effective teamwork was achieved through an interview with two senior Human Resource managers at a large international bank, the primary location of which is in Australia. From this information, a survey was developed...

Nwankwo, Cosmas Chidozie

A review of the developments within the field of structural reliability theory shows that some gaps still exist in the reliability prediction process and hence there is an urgent desire for improvements such that the estimated structural reliability will be capable of expressing a physical property of the given structure. The current reliability prediction process involves the continuous estimation and use of reliability index as a way of estimating the safety of any given structure. The reliabi...

Egea Àlvarez, Agustí

Offshore wind is emerging as one of the future energy vectors. Offshore wind power plants locations provide more strong and constant wind speed that allows to extract more power compared to onshore locations. In addition, as wind turbine components transportation is less restricted to terrestrial infrastructure, bigger and more powerful wind turbines can be installed offshore. In Europe, 1,567 MW of offshore wind power was installed in 2013. It represents the 14\% of the total wind power install...

Richardson, Mark Damian

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...

Yeow, Kervin

Three-dimensional scour propagation along offshore pipelines is a major reason to pipeline failures in an offshore environment. Although the research on scour in both numerical and experimental aspect has been extensive over the last three decades, the focus of the investigation has been limited to the two-dimensional aspect. The knowledge on three-dimensional scour is still limited. This dissertation presents the results of an experimental investigation on threedimensional scour along offshore ...

Voldsund, Mari

Oil and gas extraction have been responsible for 25—28% of the total greenhouse gas emissions in Norway the last 10 years. The part from offshore oil and gas processing, including power production, flaring, and cold ventilation on production platforms, accounted for 20—22%. Exergy analysis is a method for systematic assessment of potential to perform work. It gives the possibility to identify where in a process inefficiencies occur: both losses to the surroundings and internal irreversibilities,...

'Offshore Concourse' is an urban proposal for a response to changing ecological, economic and political conditions in Alaska and the Arctic. Since 2007, the Northwest Passage has been navigable without need of an icebreaker. As climate change rapidly redraws the world's coastlines, it poses both opportunities and challenges for global trade: melting ice caps yield new trade routes, markets and resources, but thawing permafrost renders the land an unstable ground upon which to build emerging econ...

Horng, Jyhkuen

Using simple structural and hydrodynamic models, a parametric study is made of the effect of the various parameters that influence the dynamic response of a compliant offshore structure in 2,000 ft of water. The parameters examined include the effects of different sea states, the stretching scheme used to approximate the near surface fluid kinematics, the horizontal variation of fluid kinematics; the effects of fluid-structure interaction and current; and the number of modes considered in the co...

HAHN, GUILLERMO DE JESUS

A critical examination is made of the dynamic response of a realistic guyed-tower structure to wave-induced excitations. The tower is modeled as a cantilever, discrete, stick-like system, and due consideration is given in the analysis to the nonlinear behavior of the guylines and foundation. The wave forces are defined by Morison's equation in combination with a Pierson-Moskowitz wave spectrum and linear wave theory. The response of the system is evaluated in the time domain by application of th...

Bowman, Frank Lee.

No description available.

Strategic environmental assessment (SEA) is used as a policy tool in the management of offshore oil and gas. As offshore oil and gas exploration continues to advance further into Arctic regions, questions of how SEA fits into petroleum policy frameworks, its process, and its effectiveness arise. This thesis adopts a historical institutionalist approach to explain SEA in Norway’s offshore oil and gas sector, discussing lessons to be learned from the Norwegian case, as well as the applicability of...

Heidenreich, Sara

The development of renewable energy technologies is a widely acknowledged strategy to address climate change. However, for a successful implementation of technology, socialization, i.e. embedding the technology into society, is crucial. This thesis deals with the socialization of the emerging offshore wind technology in Norway. In particular, it focuses on two potential agents of socialization, news media and scientists. The first paper, Dingpolitik at Sea: Offshore wind energy in the news media...

Gharanfoli, Daniel

Extreme value behavior of a moored semi-submersible vessel is investigated. There is a need for alternative methods other than the Rayleigh peak model when investigating non-Gaussian processes. In this context the Rayleigh peak model will generally underestimate extreme values. Four methods are investigated in this study with data from 1000 seeds. They are; construction of an empirical cumulative distribution function, mean of maximas, a LF/WF spectral partition and peak distribution tail tting....

Xin, Kelei

This thesis examines the legal and policy regime applicable to the petroleum activities on the continental shelf of China. The distinguishing characteristics of this regime are revealed by way of a comparative analysis of the salient features of the offshore petroleum laws of China, the United Kingdom and Canada. The modern Chinese offshore petroleum law and policy is essentially the product of the development of the domestic petroleum industry. The formulation of the contemporary regime was gr...

Van, Lian Uk

This report starts discussing a number of possible risk analysis methods related to five challenges identified by SINTEF within offshore renewable wind energy industry, and it ends up with case studies on two challenges by testing SPAR-H method and proposing risk reducing measures. I answer to all the questions, which are defined in the thesis assignment, by first selecting all the five safety challenges. I consider different risk analysis techniques and suggest a few of them for each individua...

Hoel, Filip

The industry is rapidly evolving, and getting more complicated and comprehensive with the time by creating dynamic systems that intertwine technical components with humans. Existing models for risk modeling and assessment are lacking in their ability to include human and organizational error to the necessary extent. Further, they struggle to keep up with the complex interaction between different components of a system as well as the high pace of change, and at the same time assess specific compo...

Tsimiklis, Georgios

Outsourcing is a trend that has penetrated many industries over the last years taking the form of offshore outsourcing in many cases. However the location decision that follows the offshore outsourcing or the offshoring decision is quite complex and almost impossible to be answered through a linear model. A series of frameworks have been developed attempting to facilitate the process above.The focus of this work is the analysis of the location decision making through the reflection of the existi...

Zhang, Yu, Ph.D. Massachusetts Institute of Technology. Department of Mechanical Engineering

Thesis: S.M., Massachusetts Institute of Technology, Department of Mechanical Engineering, 2015. / Cataloged from PDF version of thesis. / Includes bibliographical references (page 65). / Ocean energy is one of the most important sources of alternative energy and offshore floating wind turbines are considered viable and economical means of harnessing ocean energy. The accurate prediction of nonlinear hydrodynamic wave loads and the resulting nonlinear motion and tether tension is of crucial impo...

Vuorinen, Kim

Companies have a need to internationalize and locate all over the world to gain advantages against competition. However, when companies internationalize, they face difficulties. One of the major difficulties is how they can reach the same high quality around the world in their business facilities. Over one third of all construction projects reporting major defects. The purpose of this thesis is to research how companies implement Quality Management in offshore construction projects, what are the...

Zlate, Andrei

Thesis advisor: Fabio Ghironi / In Chapter 1, I analyze the cross-country transmission of business cycles when firms relocate production abroad, at locations with lower labor costs. In the model, I distinguish between fluctuations in the number of offshoring firms (the extensive margin) and the value added per offshoring firm (the intensive margin) as separate transmission mechanisms. Firms are heterogeneous in labor productivity. They face a sunk entry cost at home and an additional fixed cost ...

Emmerhoff, Ole Johannes

Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Ocean Engineering, 1994. / Includes bibliographical references (leaves 127-131). / by Ole Johannes Emmerhoff. / Ph.D.

Patrikalakis, Alexander Marinos Charles

Thesis (M. Eng.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 2010. / Cataloged from PDF version of thesis. / Includes bibliographical references (p. 95-96). / In this thesis, I design and evaluate methods to optimize the visualization of vortex-induced vibration (VIV) in marine risers. VIV is vibration experienced by marine risers in offshore drilling platforms due to ocean current flows, and appears to be perpendicular to the direction of such f...

Klepsvik, Jonny

Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Ocean Engineering, 1995. / Includes bibliographical references (leaves 54-55). / by Jonny Klepsvik. / M.S.

Aspizua, Lucía

ABSTRACT This project deals with the search of the most proper offshore foundation to install in the Baltic Sea, in order to reduce costs and environmental impact. A pre-study was performed to define the Baltic Sea conditions and the required knowledge for the following steps. Afterwards, the specifications were set and clarified, and then the concept analysis phase was started. The analysis phase included the description of each one of the current foundations, those which are considered convent...

Mtango, Prosper

Due to its growth at exponential rate offshore software development has become a common way of producing software by software organizations from highly industrialized countries in Europe and North America.  Previous studies have revealed that some of these organizations use agile project management frameworks in managing and running their offshore software projects. Blending agile principles and offshore software development appears to raise a contradiction as the two notions have opposite chara...

Hodgkinson, Derek Anthony Martin

The results of hydrodynamic analyses of two problems involving offshore structures are displayed graphically. This form of presentation of the results and the liberal use of colour have been found to significantly help the ease in which the results are interpreted. For the transformation of waves around an artificial island, a time history of the evolution of the regular, unidirectional wave field around an artificial island is obtained. Through the use of colour, regions in which wave breaking...

Ahmadi-Nedushan, Behrooz, 1966-

This thesis presents a study of the ultimate strength capacity of two offshore platforms located in the Gulf of Mexico. The objective of the study was to validate existing non-linear finite element models for estimating the loads and strength of offshore platforms. / From August 24 to 26 1992, hurricane Andrew moved through the Gulf of Mexico with sustained winds of 140 miles per hour. Thirty-six major platforms suffered significant damage, of these, ten were completely toppled and twenty-six we...

O'Keefe, William James Wyse

No description available.

Syvertsen, Pål Guttorm

This master thesis is about modeling and control of crane placed on an offshore vessel. An active heave compensating crane, designed by MacGregor, has been used as a basis for developing the crane model. Cranes of this type are placed on a wide variety of vessels and operate all over the world. Besides MacGregor, several other well reputated crane suppliers design similar cranes. In addition, two inverse kinematics control algorithms and three input shapers have been described, implemented and t...

Brekke, Øystein

The report is divided into three different categories; background, concept evaluation and comparison and the methodology development. The background gives a short introduction of product architecture, modularity and modularization and also a brief description of existing design concepts which are capable of offering modular capabilities in the operation phase of a vessels life cycle.The second part of the report is a review of possible advantages and disadvantages with the implementation of a si...

Wisznia, Roman

The growing interest around offshore wind power, providing at the same time better wind conditions and fewer visual or environmental impacts, has lead many energy suppliers to consider the installation of offshore wind farms. However, the marine environment makes the installation and maintenance of wind turbines much more complicated, raising the capital and operation costs to an undesirable level and preventing the fast progression of this technology worldwide. Availability of offshore wind tur...

Langley, R. S.

This Thesis investigates the methods which are currently avail- able for the dynamic analysis of Offshore Mooring Terminals, particular regard being paid to Single Point Mooring (SPM) Terminals. Various aspects of the problem are considered in turn, these being the random vibration of non-linear systems, the analysis of catenary mooring lines, buoy dynamics, ship motions, second order (or slow drift) forces and motions, and low frequency motions caused by instabilities. These various aspects are...

Ghadimi, R.

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...

Kirkley, Owen Major.

No description available.

Abdolmaleki, Kourosh

[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 stru...

Svensson, Niklas, Holmberg, Martin

The market for renewable energy and an international power grid is constantly growing. This project has focused on the installation and protection methods for offshore power cables. Long distance cables over e.g. oceans and smaller distances within offshore wind farms. The focus is on three different materials for the protection task; concrete, cast iron and plastics. These materials have been evaluated in aspect to strength, life-length, reliability and environmental impact. Snapp products of S...

Ysaccis B., Raul

On the northeastern offshore Venezuela, the pre-Tertiary basement consists of a deeply subducted accretionary complex of a Cretaceous island arc system that formed far to the west of its present location. The internal structure of this basement consists of metamorphic nappes that involve passive margin sequences, as well as oceanic (ophiolitic) elements. The Tertiary evolution of the northeastern Venezuela offshore is dominated by Paleogene (Middle Eocene-Oligocene) extension and Neogene transte...

Wu, Shengyu

Various stages of mid-Jurassic salt deformation resulted in post-salt extensional and contractional systems on the continental slope offshore Louisiana. Pre-mid-Cretaceous salt deformation resulted in salt massifs, small allochthonous salt bodies, pseudo-clinoforms and turtle structures. During a significant period of sediment starvation between mid-Cretaceous and mid-Oligocene time, previously formed salt and related structures remained stable. Following the reactivation of salt structures from...

Sůva, Vojtěch

This thesis considers the identification of main offshore financial centers and the impact of the recent global financial crisis on them. The identification follows the ideas proposed by Zoromé (2007) and is developed further in a model based on data for each country's GDP, financial services and portfolio assets (International investment position, CPIS) for the years 2001-2008. The thesis begins with an overview of the main concepts of offshore financial centers and explains the development of ...

Walsh, Bruce William

The onshore/offshore transport mechanisms are investigated. Careful and detailed observations of the surf zone are made to find any differences or similarities between the resulting flows caused by different breaking types. Emphasis is placed on the spilling and plunging breakers. Even though the physical breaking properties are significantly different, the time-averaged properties of the surf zone for each type of breaking wave are similar. Using this as a basis, a model of the beach is develop...

Smith, Dominic.

Thesis (M.Bus(Taxation))--University of Western Sydney, Nepean, 1990. / Includes bibliography.

Brandsar, Jo

The title of the thesis - "Offshore Rankine Cycles" - is very general and cover a large range of engineering fields, e.g. thermodynamic cycles (Rankine, ORC, Brayton, Kalina, etc.), mechanical equipment (gas/steam turbine, heat exchangers and additional equipment) and safety concerns (flammable and/or toxic fluids, high temperature and pressures), to name the most important.The thesis try to give a brief overview of all critical points and alternatives, concerning employment of a waste...

Tyrberg, Simon

To gain further knowledge about the motion of the wave buoys involved in the Islandsberg project for wave power, a surveillance system has been designed. The base for the system consists of a lattice tower to be placed on one of two islets southwest of Lysekil: Klammerskären. The distance from the islets to the wave energy research park and the wave buoys is between 150 and 300 meters. The tower will be 12 meters high and in it a network camera will be mounted, together with a small wind turbine...

Stenvold, Torkjell

No description available.

Smith, Dominic Scott, University of Western Sydney, Nepean, School of Business

Until recent years the proportion contributed to total government revenue by the petroleum industry has continued to increase. However, Australia's oil reserves are now diminishing as known fields are consumed, and exploration efforts have failed to locate new sources of petroleum. The oil industry has called for the relaxation of the government take in order to encourage exploration activity for the replacement of reserves. In an environment of low world prices and continuing high levels of tax...

Woodson, Ross D.

An overview of current concerns in the regulation of offshore pipelines is presented along with tabulated summaries of pipeline failure causes, failure prevention techniques, and pipeline monitoring and early intervention techniques. A database of over 1000 offshore pipeline failures in the Gulf of Mexico Offshore waters has been compiled from combined records of the Department of Transportation Office of pipeline Safety, U.S. Coast Guard National Response Center, and the Department of Interior ...

Goldman, Ian

Offshore jurisdictions attempt to attract foreign capital to themselves by having lower financial regulatory requirements than other jurisdictions. By examining the literature and the latest data on financial flows, the thesis attempts to identify the sources of the powerful systematic causes and effects of Offshore. It does this by disaggregating elements of Offshore that are normally conflated. An eclectic theory based on elements of liberal international theory and world-system structur...

Haffejee, Mahomed Cassim.

No abstract available. / Thesis (M.A.)-University of Durban-Westville, 2002.