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Jolink, Chris (author)Pile driving can cause plastic deformation to the head of the driven pile, which in turn can lead to connectivity issues when the superstructure is installed. Moreover, plastic deformation reduces the estimated service life of the structure. Therefore, it is necessary to monitor the strain levels during the installation in order to detect if the...master thesis 2018
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Bouman, Thijs (author)The growing interest in the development of offshore wind farms in seismic active areas demands a better insight into the requirements earthquakes impose on the design of wind turbine foundations. The complexity of the soil-structure interaction (SSI) during an earthquake results in large uncertainties in the design process of a monopile...master thesis 2018
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Van de Putte, Valentine (author)This thesis project has set out to investigate the response in fore-aft direction of a monopile wind foundation supporting an NREL 5MW turbine, offshore the coast of Taiwan, which is affected by weak to strong earthquake ground motion in combination with normal sea state conditions. The soil at the location of the monopile is layered, with sand...master thesis 2018
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Wittingen, Martijn (author)After years of using fossil fuel, the transition to renewable energy sources need to be made to limit the increase in temperature and to support the future energy demand. To support and speed up the transition phase from fossil fuels to renewables it is necessary to decrease the costs. Offshore Wind Turbines are widely used for the production of...master thesis 2018
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Ntouras, Fanis (author)World energy consumption rises every year. Therefore, producing renewable and<br/>sustainable energy is necessary to protect the viability of this planet. The most well-known and promising form of renewable energy is that of wind power. The limited space in terrestrial areas yielded motivation to the growth of offshore wind industry. Offshore...master thesis 2018
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Đilas, Luka David (author)Offshore wind has achieved many milestones considering this relatively new and emerging industry. Its huge advancement is mostly driven by lowering the overall project cost and renewable energy targets which are set by the EU. One of the potential cost savers can be found in the foundation structure design in which the monopiles are the most...master thesis 2018
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Maliepaard, Mans (author)The offshore wind market experiences large growth over the last decade. There is a clear trend to installation in deeper waters and to larger wind turbines, to maximize the energy output. The majority of offshore windmills use a monopile foundation, which due to the current trends are getting larger. Seaway Heavy Lifting (SHL) is a company that...master thesis 2018
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Vogel, Maarten (author)The hybrid monopile is a substructure concept for offshore wind turbines initially designed and developed by Fistuca B.V. This Thesis is about the initial concept design of the connection details in the hybrid monopile. Several concept connections are designed. The best concept is selected and thereafter assessed on the ultimate limit state,...master thesis 2018
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Dam, Merijn (author)An offshore wind turbine requires a stable support structure to support the tower and nacelle. The support structure in the form of a monopile is lowered to the seabed and hammered in the soil. During the lowering process the monopile may show excessive motions, that occur on an irregular basis. The cause for this is unknown. This thesis is...master thesis 2018
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Atkinson, Rob (author)Delft Offshore Turbine (DOT) is developing a new offshore wind turbine, including, amongst other innovations, a slip-joint that connects the turbine tower and monopile foundation. The slip-joint is a mechanical, friction-based connection that provides many advantages over a bolted or grouted connection, such as the ability to support high loads,...master thesis 2018
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Chortis, Giorgos (author)Wind turbines are nowadays the main means for producing renewable energy in Northern and Western Europe, and therefore research is conducted to secure their efficiency. One of the critical aspects of the windfarms is the foundation type, as it can define the functionality and the cost of each turbine. Monopiles have prevailed as the most...student report 2018
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Middelweerd, luuk (author)In the Dutch coastal waters more and more wind turbines on monopile foundations are built. An important design parameter is the first natural frequency of the wind turbine. The first natural frequency is dependent on environmental conditions and different soil conditions such as scour. This research gives a better insight into the sensitivities...master thesis 2017
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Norbruis, Joris (author)A global focus on the shift to renewable energy has introduced international targets for sustainable energy production, which have strongly increased the interest in offshore wind turbines (OWT’s). In order to make offshore wind energy even more competitive, the levelised cost of energy for this industry has to be brought down. One of the OWT...master thesis 2017
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Creusen, Koen (author)The offshore wind industry is developing larger turbines, often placed in deeper water. This requires larger foundations. The predominant foundation type is the steel monopile, typically consisting of two large diameter pipes, the monopile (MP) and the transition piece (TP). The Wedge Connection is a new type of connection between these...master thesis 2017
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Kementzetzidis, Evangelos (author)In recent years, offshore wind is becoming an increasingly growing market in Europe. Many resources are allocated towards ensuring its sustainable progress while one of the biggest uncertainties encountered lays in the offshore wind turbine's (OWT) foundations. In Europe, monopiles are the most widely adopted solution to found such structures in...master thesis 2017
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van den Bosch, Joost (author)Currently, the foundation design of offshore wind turbines is based on a simple cantilever beam model with a mass representing the rotor and nacelle, or by making use of wind turbine simulation software such as Bladed, which are built for rotor design. The simple models are unrealistic since the dynamic interaction between the aerodynamic loads,...master thesis 2017
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Raghavan, Vaibhav (author)The Offshore wind industry is constantly expanding and one of the key cost drivers is the offshore wind turbine support structure. The foundation accounts for up to 35 % of the total installation cost of the wind turbine. The monopile foundations are the most commonly used support structure with diameters up to 6m and Embedded length/depth (L/D)...master thesis 2017
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Rhomberg, Matthieu (author)Optimization of structures in a domain with large uncertainties is rather difficult. This also applies for the offshore wind energy sector. For current offshore wind energy development locations with monopile-based support structures the fatigue limit state is the driving design criteria. These analyses are connected with long time domain...master thesis 2017
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Anderson, M.C. (author)In the 26 years since the first offshore wind farm was installed in Vindeby, Denmark, the offshore wind industry has undergone remarkable growth. Recently, this growth has accelerated, advancing farms rapidly into deeper water and utilizing larger turbines. As offshore wind farm developers continue to look towards heavier, higher capacity...master thesis 2017
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Charalambous, Chris (author)The rapid rate in technological advancements leaves little to none options for our environment to react. The excessive use of "conventional" energy is bringing planet Earth to its knees. However, people started recognizing the value of renewable energy sources.<br/>One of the major renewable sources is the wind energy. The wind energy can be...master thesis 2017