Searched for: mods_note_programme_s%3A%22Engineering%255C%2BMechanics%22
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Maljaars, J.L. (author)
Over the years, the installed capacity of offshore wind turbines is increasing rapidly. However, the Levelized Costs Of Energy (LCOE) is still higher than the LCOE of traditional energy production methods like nuclear power or energy from coals or gas. This research focuses on a further decrease of the LCOE, by minimizing the mass of a monopile...
master thesis 2017
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Stolk, M. (author)
Since its introduction, Topology Optimization (TO) has been applied to a broad range of design cases. TO is a material distribution method which finds the optimal material lay-out for a given design space while upholding given constraints and boundary conditions. This has made the method popular in structural mechanics where it is used to find...
master thesis 2017
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Immerzeel, F.C. (author)
Kriging based methods enable the deterministic and robust optimization of computationally expensive systems. With a limited amount of function evaluations the optima are found in an iterative process with expected improvement as infill sampling criteria. Outputs of computer models can be stochastic and/or the models do not always succeed to...
master thesis 2016
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van Breemen, F.C. (author)
Self-excited vibrations in Laval rotors supported by hydrodynamic bearings, know as oil whirl, induce friction losses and noise, or may even damage the system. This transient dynamic behaviour is caused by the stable and unstable equilibria in the system. To study this phenomenon, this research uses numerical continuation. This method determines...
master thesis 2016
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Vermeulen, F. (author)
Selective Laser Melting (SLM) is an Additive Manufacturing (AM) technique that uses a laser to selectively melt metallic powder in a layer-wise manner, in order to produce functional metal components. It offers great freedom in design and facilitates fast iterations, with the potential of speeding up development phases throughout a wide range of...
master thesis 2016
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Feitsma, J.W. (author)
In this work, topology optimization is used to obtain optimal designs with minimal compliance as the objective. The checkerboard problem, refers to a resulting optimal topology where the material is distributed in regions of alternating solid and void elements. It has been shown that these regions emerge due to higher stiffness of the...
master thesis 2016
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Knol, M.F. (author)
Selective Laser Melting (SLM) is a 3D-printing method to produce metal parts. In SLM a part is manufactured layer-by-layer by selectively melting a metal powder with a laser. Although SLM is a promising process for the production of high-quality parts, the implementation in high-tech industry is held back by a few barriers. One of the main...
master thesis 2016
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Van Leeuwe, K. (author)
Much research has been done in the past couple of decades on the vibrations of rotating structures, such as helicopter and wind turbine blades. This is the consequence of ever increasing standards towards dynamic performance of these systems. Previous investigations have primarily dealt with constant rotational velocity, with a focus on the...
master thesis 2016
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Gandhi, N.N. (author)
Rapid growth in automotive sector and stringent safety requirements have led to the need for more sophisticated feedback mechanisms for the vehicle systems. One of the major breakthrough is anticipated with the use of estimated loads with help of a Load Sensing Bearing. Load Sensing Bearing is a concept in which strain is measured on a hub...
master thesis 2016
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Driessen, A.M. (author)
This research aims at improving the synergy between 3D printing and topology optimisation. 3D printing, more formally known as additive manufacturing, forms an object by constructing successive layers on top of each other. This procedure of manufacturing offers new possibilities due to the improved design freedom. Topology optimisation is a...
master thesis 2016
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Van der Linde, T.M. (author)
Topology optimization is increasingly used as a design tool in engineering. Within structural mechanics, most applications focus on statics. An extension to time-domain (transient) dynamics will have many useful applications, but this is currently hindered by high computational costs. The goal of this research is to reduce these costs by...
master thesis 2016
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Theulings, E.C.A.S. (author)
Deformable mirrors are widely used in adaptive optics to correct wavefront aberrations. Actuators are used to deform the mirror into the shape that is needed for this correction. The most common type of actuation is with out-of-plane actuators that are placed on the backside of the mirror surface. Actuation with in-plane actuators placed on the...
master thesis 2015
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Van Der Wurff, S. (author)
This work focuses on a multidisciplinary design optimization of an aircraft wing. Among others, a structural optimization of the wing stiffness is performed. For a certain stiffness model, a set of relevant load cases can be determined that have high chance to cause active constraints. The purpose of this research is to investigate if the set of...
master thesis 2015
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Teunisse, N.K. (author)
Micro air vehicles (MAVs) are small aircraft that are promising for search and rescue missions or remote observations of hazardous or inaccessible areas. Currently one of the problems MAVs face is the limited action radius. To increase the action radius, a more energy efficient MAV is needed. This can be achieved by exploiting the resonance of...
master thesis 2015
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Sombroek, C.S.M. (author)
Nonlinear Normal Modes (NNMs) have a clear conceptual relation to the classical linear normal modes (LNMs), yet they offer a solid theoretical framework for interpreting a wide class of non-linear dynamical phenomena with no linear counterpart. The main difficulty associating with NNMs is that the computation for real-size models is expensive,...
master thesis 2015
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Jain, S. (author)
master thesis 2015
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Singh, A.S. (author)
Computational numerical methods are important tools in science and technology today. Numerical simulations of nonlinear problems are usually computationally expensive. Model order reduction is a technique to reduce computation time of mathematical numerical models. Model order reduction of nonlinear problems is still in its developing state. In...
master thesis 2015
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Van den Boom, S.J. (author)
Buckling is a failure mode of a structure caused by stiffness loss of compressed material. It arises primarily in slender structures, for which the bending stiffness is much lower than the axial stiffness. Slender, buckling sensitive structures occur especially in optimised designs, where an excellent strength-to-weight ratio is required. For...
master thesis 2014
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Sridhar, A. (author)
In high precision motion systems, rather flexible cable slabs provide electrical power and cooling liquid to moving stages. The positioning accuracy of free floating stages is defined by the disturbances action on it. So, it is of utmost importance to accurately quantify the disturbance forces of these cables. The mathematical model of such a...
master thesis 2014
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Bosma, T. (author)
This study focuses on solving steady state fluid-structure interaction (FSI) problems subjected to incompressible flow at low Reynolds numbers and linear elastic structural behavior. The fluid-structure interface geometry is described with a levelset method (LSM). The governing equations are discretized in space with the eXtended Finite Element...
master thesis 2013
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