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Van Ginhoven, J. (author)Voor de opwekking van duurzame energie neemt het aandeel offshore windturbines stelselmatig toe, dit door de vele voordelen ten opzichte van landelijke windturbines. Het principe is overal hetzelfde; in de gondel wordt de mechanische energie wordt omgezet in elektrische energie. Hoe hoger de mast, hoe hoger de energieproductie omdat de...master thesis 2006
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Versteijlen, W.G. (author)In today’s cutting costs environment in the offshore wind industry, significant achievements can be made with a better assessment of dynamic soil-pile interaction. More knowledge regarding the contribution of the dynamic soil-pile interaction to damping of an offshore wind turbine structure (OWT) could perceptibly reduce the fabrication costs of...master thesis 2011
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De Blaeij, T. (author)Monopiles are being used more extensively for offshore wind turbine foundation. Current guidelines on the construction of fixed offshore foundations still base the design of laterally loaded piles in sand on empirical data (p-y curves), originating from the oil and gas industry, from field tests executed in 1974 on 0.61 m diameter piles. However...master thesis 2013
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Van den Brink, F. (author)Scour hole formation around offshore monopile foundations is a threat for the structure’s stability. Large uncertainty leads to conservatism in design codes and hence to high construction costs. Under the same hydrodynamic loading as for scour hole formation the soil can liquefy due to structural vibrations or waves. The aim of this study is to...master thesis 2014
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Velarde, J. (author)Further advancements in the offshore wind industry, which come with the use of larger wind turbines at deeper water, require larger support structures. For shallow and intermediate water depths, monopile foundations still remain the most widely-used and cost-effective support structure due to the relative simplicity of fabrication and...master thesis 2015
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Michalopoulos, V. (author)The optimal design and preliminary strength assessment of offshore wind support structures gain growing interest given the potential to drive the costs further down. This study develops a framework for Fatigue Limit State (FLS) estimations of monopiles in a simple and quick manner so as to address site variations in an offshore wind farm (OWF)....master thesis 2015
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Centen, I. (author)In this report a prediction method is developed for scour around monopiles. A soft computing technique called genetic programming (GP) is used to create a scour prediction formula that can compute scour in all offshore conditions, meaning current-induced, wave-induced and combined current- and wave-induced scour. The GP was trained with an...master thesis 2015
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Crol, J.B. (author)The subject of this report is the upending of a floating monopile for an offshore wind turbine foundation. This is an assignment of Van Oord Dredging and Marine Contractors BV. An analytical model has been developed to simulate the upending of a monopile in MapleTM, based on the general theoretical principles and the experience of Van Oord. An...master thesis 2015
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Louis, O. (author)A significant reduction in the levelized cost of electricity is necessary for offshore wind farms to become a competitive energy source. Amongst other methods, overall project cost reduction can be achieved by optimized support structure design. An upcoming trend is the use of `XL monopiles', which provide a cost effective foundation solution...master thesis 2015
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Rosales Gonzalez, M.L. (author)With the depletion of traditional energy sources, the usage of renewable energy alternatives has increased over the past years. Among them, wind energy is considered as one of the most economical and environmentally friendly alternatives, and is seen as one of the main sources of energy in the future. A very promising field in the area of wind...master thesis 2016
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Buitendijk, L.G. (author)Offshore wind turbines are growing significantly to become a cost-effective alternative for the offshore oil and gas market. This causes rapid growth of offshore wind turbine foundations (monopiles). Currently, monopiles are installed using jack-up vessels like Aeolus. However operations will be limited by crane capacity and its cost...master thesis 2016
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Haarman, Mirthe (author)The demand for offshore wind farms is developing rapidly due to the increased demand for renewable energy. Installation of foundation piles for offshore wind, however, are accompanied by a serious by-product which is the high underwater noise levels emitted during the pile-driving process. Current mitigation methods have proven to decrease the...master thesis 2017
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Nikiforakis, Ioannis (author)The application of stability checks in simulated offshore wind structures is performed through tools that are established in the offshore wind industry. In particular, the structure should fulfill certain strength and fatigue criteria among which Fatigue Limit States (FLSs) checks are critical. In terms of the process, fatigue assessment can be...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
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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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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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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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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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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