Searched for: subject:"modeling"
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Liu, Y. (author), Ferrari, Riccardo M.G. (author), Wu, Ping (author), Jiang, X. (author), Li, Sunwei (author), van Wingerden, J.W. (author)
Floating Offshore Wind Turbines (FOWTs) operate in the harsh marine environment with limited accessibility and maintainability. Not only failures are more likely to occur than in land-based turbines, but also corrective maintenance is more expensive. In the present study, a mixed model and signal-based Fault Diagnosis (FD) architecture is...
journal article 2021
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van der Tuin, M.S. (author), Pel, A.J. (author)
Transport infrastructure owners are moving from reactive toward proactive infrastructure management. This involves computation of costs associated with failure or maintenance, including expected transport delays. These delays are often computed by multiplying additional travel time by the number of travellers. However, this does not reflect...
journal article 2020
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Boersma, Q.D. (author)
Responsibly using the subsurface for geo-energy extraction or storage requires an accurate understanding of the static and dynamic behaviour of the targeted reservoirs. While mostly dependent on intrinsic rock properties (e.g. porosity and permeability), this behaviour is also believed to be significantly impacted by the presence of natural...
doctoral thesis 2020
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Lopes Fernandes, R. (author), Teixeira De Freitas, S. (author), Budzik, Michal K. (author), Poulis, J.A. (author), Benedictus, R. (author)
The aim of this study is to investigate the effect of the adherend material on the mode I fracture behaviour of bi-material composite bonded joints. Both single-material (steel-steel and composite-composite) and bi-material (steel-composite) joints bonded with a structural epoxy adhesive are studied. Additionally, two adhesive bondline...
journal article 2020
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Kocaman, E. S. (author), Chen, B. Y. (author), Pinho, S. T. (author)
Design and optimisation of large structures, including the positioning of lower-level components, typically require extensive user involvement and sequential mechanical analysis/optimisation iterations. This paper presents an original method that enables adaptive positioning of lower-level models (such as components) within higher level...
journal article 2020
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Naeimi, M. (author)
Rolling contact fatigue (RCF) is an important form of damage in wheels and rails that typically has surface and subsurface cracks. Squats are one of the major RCF defects that occur in the running band of rails and can create high dynamic forces and cause rail fracture if they are not detected and treated in time. In the current research, three...
doctoral thesis 2020
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de Wildt, T.E. (author)
This thesis introduces an approach to support the long-term social acceptance of energy systems by addressing value conflicts embedded in regulatory and technical designs. When designing energy systems, the realisation of some values can conflict with the realisation of other values. The decision to deploy energy systems therefore inevitably...
doctoral thesis 2020
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Kavisha, K. (author)
A 3D city model is a digital representation of the spatial features in an urban<br/>environment. Buildings, terrain, vegetation, water bodies, etc. all form an integral part of a 3D city model. The possibility to enrich these city models with additional application-specific information, whether new semantics or geometry, further increases their...
doctoral thesis 2020
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Eleftheroglou, N. (author)
Prognostics is an emerging field of research that enables the real-time health assessment of an engineering system and the prediction of its future state based on up-to-date information. This field integrates various scientific disciplines including physics/mechanics, computational statistics and probabilistic modeling, machine learning and...
doctoral thesis 2020
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Zhang, W. (author)
The assessment of the potentially destructive impacts of subaqueous landslides on offshore pipelines is required when the pipeline route passes through zones with a risk of mass movements. Therefore, quantifying and evaluating the ultimate load/pressure acting on the pipeline is one of the key factors in geotechnical safety design of the...
doctoral thesis 2020
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Li, Q. (author)
Although wind energy capacity has increased significantly in the last few decades, the installed capacity of offshore wind turbine still lags far behind that of onshore wind turbines due to the installation and foundation cost. The aim of this research project has been to clarify the influence of combined vertical and lateral loads, lateral...
doctoral thesis 2020
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Lindhout, P. (author), Reniers, G.L.L.M.E. (author)
Our current predicament, the Covid-19 pandemic is first of all a health crisis. However, social disruption and economic damage are becoming visible some 7 months after the Wuhan City outbreak early December 2019. The authors wondered what could have been done better in prevention and repression of the Covid-19 pandemic from a safety...
journal article 2020
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Derakhshanfar, P. (author), Olsthoorn, M.J.G. (author), Devroey, Xavier (author)
Model seeding is a strategy for injecting additional information in a search-based test generation process in the form of models, representing usages of the classes of the software under test. These models are used during the search-process to generate logical sequences of calls whenever an instance of a specific class is required. Model seeding...
conference paper 2020
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Liu, H. (author)
The wind energy industry has gained a key role in the global fight against greenhouse gas emissions. Although fossil fuels have still the largest share in the global energy mix, the production of wind energy, especially offshore, has rapidly grown since the 1990s. According to the International Energy Association, Europe targets offshore wind to...
doctoral thesis 2020
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Lepillier, B.P. (author)
In 2020, as the world Energy demand keeps on rising (International Energy Agency (IEA), 2019), and with the global climate warming a reality (The Organisation for Economic Co-operation and Development (OECD), 2020), reducing our societal impact on Earth is of utmost importance. Energy and Climate have always been intrinsically related. Therefore...
doctoral thesis 2020
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Doekemeijer, B.M. (author)
Open-loop wake steering inconsistently improves the energy yield of wind farms in field experiments in the literature. This thesis matures wind farm control technologies for power maximization in a model-based closed-loop framework towards real-world practical applicability. Firstly, open-loop wake steering is evaluated on a commercial onshore...
doctoral thesis 2020
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Ralph, Paul (author), Baltes, Sebastian (author), Adisaputri, Gianisa (author), Torkar, Richard (author), Kovalenko, V.V. (author), Kalinowski, Marcos (author), Novielli, Nicole (author), Yoo, Shin (author), Devroey, Xavier (author), Tan, Xin (author), Zhou, Minghui (author), Turhan, Burak (author), Hoda, Rashina (author), Hata, Hideaki (author), Robles, Gregorio (author), Milani Fard, Amin (author), Alkadhi, Rana (author)
Context: As a novel coronavirus swept the world in early 2020, thousands of software developers began working from home. Many did so on short notice, under difficult and stressful conditions.<br/><br/>Objective: This study investigates the effects of the pandemic on developers’ wellbeing and productivity.<br/><br/>Method: A questionnaire survey...
journal article 2020
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Mulders, S.P. (author)
In the last decades, tremendous efforts have been put in advancements of wind turbine technology by scientific research and industrial developments. One of the focal areas has been the upscaling of turbines to increase power capacity. However, by enlarging turbine sizes, the square-cube law dictates rising costs per unit of power capacity. To...
doctoral thesis 2020
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Lyu, W. (author)
When concrete is subjected to sustained load, it first deforms elastically and then continues to deform with time. The stress-induced time-dependent deformation is, by definition, creep. Creep plays an important role in view of the serviceability, durability and sometimes even the safety of concrete structures. Prediction of the long-term creep...
doctoral thesis 2020
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Pippia, T.M. (author)
Energy systems influence many aspects of society, from the residential sector to the commercial one. Improving the performance and efficiency of energy systems and guaranteeing their stability is a fundamental task of control engineers. In this regard, this thesis presents modeling and control solutions for energy systems, with a focus on both...
doctoral thesis 2020
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