Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 32 for “"Offshore wind turbines"”.
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Wave loads on offshore wind turbines
… 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 importance in the …
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Innovative hull design for servicing offshore wind turbines
Accessing turbines for maintenance is a key operational issue for an offshore wind farm. Currently there is a 1.5m significant wave height (Hs) limit for the standard “step over” method of transferring personnel to an offshore wind turbine, though this varies with, vessel type, wave period and …
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Cost of energy modelling and reduction opportunities for offshore wind turbines
The cost of generating electricity from wind turbines, particularly offshore wind turbines is currently too high. To ensure offshore wind energy is truly competitive with traditional fossil fuel and nuclear energy generation, the true cost of offshore wind energy and ways of reducing that cost must …
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Cyclic behaviour of monopile foundations for offshore wind turbines in clay
Investment into offshore wind farms has been growing to address the growing threat of climate change. The majority of offshore wind turbines (both current and planned) are founded on monopiles, large circular steel pipe piles ranging from 4.0 m – 7.5 m in diameter. Based on available borehole …
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Feasibility study into a novel vessel design for accessing offshore wind turbines
… to allow safe access for personnel to and from offshore wind turbines in sea states in which the facility would be currently inaccessible. The problem of accessing offshore wind turbines is an issue that has been identified as a major cause of turbine downtime. Access is required to carry out …
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A CFD study of fluid-structure interaction problems for floating offshore wind turbines
… of the fastest growing renewable energy sources, wind energy is playing an increasingly important part in addressing the climate change and energy crisis issues the world is currently facing. The abundance of wind resource in offshore areas makes them a popular choice for turbine installation. In …
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The Seismic Response of Offshore Wind Turbines Supported by Monopiles and Alternative Foundations in Liquefiable Soils
… (APAC) economies generate over half of the offshore wind power in the world, yet a significant portion of their offshore wind farms is likely to face catastrophic earthquakerelated phenomena during their operational life. Among these, liquefaction of saturated sands forming the seabed is …
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Advanced experimental modelling of hydrodynamic and aerodynamic wakes in floating offshore wind turbines using particle image velocimetry
… for optimising energy production in floating wind farms. Understanding the influence of floating substructure motions on turbine aerodynamics is crucial for achieving this, as the two-way coupling between the turbine and substructure impacts aerodynamic performance. Meanwhile, these …
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An experimental investigation into the most prominent sources of uncertainty in wave tank testing of floating offshore wind turbines
… with renewable energy sources, and floating offshore wind is seen as a critical component in the drive towards energy diversification. Floating offshore wind facilitates accessing a far vaster wind resource that exists in deeper waters, further offshore. Floating offshore wind platforms must …
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Optimization, control, and knowledge extraction in engineering systems: Applications in vehicle suspension, thermal management, and floating offshore wind turbines
Submission published under a 24 month embargo labeled 'Closed Access', the embargo will last until 2026-08-01
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Modeling nonlinear stochastic ocean loads as diffusive stochastic differential equations to derive the dynamic responses of offshore wind turbines
… developed for modeling stochastic ocean wave and wind loads as diffusive stochastic differential equations (SDE) in a state space form to derive the response statistics of offshore structures, specifically wind turbines. Often, severe wind and wave systems are highly nonlinear and thus treatment …
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Dynamic response of spar-type offshore floating wind turbines
… significant increase in the interest in floating offshore wind turbines from the wind energy industry, governments and academia. Partially driven by the recent nuclear disaster in Japan, but also by the lack or complete absence of shallow waters in various countries around the globe (making fixed …
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Numerical Simulations of Oil Spills and Wind Turbine Flows for Applications in Offshore Environmental Sustainability
… of fossil fuel has resulted in considerable offshore oil drilling activities, significantly increasing the possibility of offshore oil spill accident. Specifically, the 2010 Deepwater Horizon accident has shocked the world with its severe adverse impact on the ocean ecosystem and the human …
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Predicting Interference Patterns Between Offshore Wind Farms through Wake Analysis
… the wake effect from a cluster of large-scale offshore wind turbines with the purpose of optimizing spacing between separate farms to avoid wake interference. Placing wind turbines within a field of disturbed flow decreases power output, and in some cases, threatens structural integrity. …
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Relating onshore wind turbine reliability to offshore application
With the award of the latest Round 3 offshore wind farm sites around the UK coast the wind industry is moving from the operation of near inshore to truly offshore wind farms. This has two major implications, the first being that wind turbines are now being specifically designed for offshore …
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Dynamic analysis of a spar-type offshore floating wind turbine and its mooring system
… and the reducing availability of fossil fuels. Wind energy is one of the cleanest and most sustainable renewable resources. People mainly use two types of wind turbines - onshore and offshore, to harvest the wind energy. Compared with onshore wind, offshore wind resources allow more reliable …
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Parametric design of floating wind turbines
As the price of energy increases and wind turbine technology matures, it is evident that cost effective designs for floating wind turbines are needed. The next frontier for wind power is the ocean, yet development in near shore waters has been slowed by aesthetic concerns of coastal residents. …
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Vibration Reduction of a Semisubmersible Floating Wind Turbine using Optimized Tuned Mass and Tuned Inerter Dampers
Over the past decade, offshore wind has positioned itself as one of the most promising renewable energy markets. While this field is currently dominated by fixed-bottom wind turbines located within a limited depth range, floating turbines are showing promise as a way to capture the more developed …
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Computation of nonlinear hydrodynamic loads on floating wind turbines using fluid-impulse theory
Wind energy is one of the more viable sources of renewable energy and offshore wind turbines represent a promising technology for the cost effective harvesting of this abundant source of energy. To capture wind energy offshore, horizontal-axis wind turbines can be installed on offshore platforms …
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