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Yao, W. (author), Chen, X. (author), Ouyang, Q. (author), Van Tooren, M. (author)Optimization procedure is one of the key techniques to address the computational and organizational complexities of multidisciplinary design optimization (MDO). Motivated by the idea of synthetically exploiting the advantage of multiple existing optimization procedures and meanwhile complying with the general process of satellite system design...journal article 2011
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Delinchant, B. (author), Lahaye, D. (author), Wurtz, F. (author), Coulomb, J.L. (author)This paper deals with the Space Mapping optimization algorithms in general and with the Manifold Mapping technique in particular. The idea of such algorithms is to optimize a model with a minimum number of each objective function evaluations using a less accurate but faster model. In this optimization procedure, fine and coarse models interact...report 2012
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Velez Quintero, C.A. (author)In this research a considerable amount of scientific evidence had been collected which leads to the conclusion that the urban wastewater components should be designed as one integrated system, if the protection of the receiving waters is to be achieved cost-effectively. Even more, there is a need to optimize the design and operation of the...doctoral thesis 2012
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De Baar, J.H.S. (author)Both measurements and computer simulations of fluids introduce a prediction problem. A Particle Image Velocimetry (PIV) measurement of a flow field results in a discrete grid of velocity vectors, from which we aim to predict the velocity field or related quantities. In Computational Fluid Dynamics (CFD), the output of the computer code depends...doctoral thesis 2014
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Dufour, R. (author), De Meulenaere, J. (author), Elham, A. (author)This paper presents the multidisciplinary optimization of an aircraft carried sub-orbital spaceplane. The optimization process focused on three disciplines: the aerodynamics, the structure and the trajectory. The optimization of the spaceplane geometry was coupled with the optimization of its trajectory. The structural weight was estimated using...journal article 2015
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Mahulja, S. (author)The project covers creation of a framework for optimisation of wind farm layouts. The optimisation is done with an objective of maximising the Net Present Value of the farm. With that aim, both power production and the fatigue driven component degradation are considered. The work is split in two main parts. First, in order to circumvent the use...master thesis 2015
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Chatzikonstantinou, I. (author)Environmentally friendly and comfortable buildings are a much sought after goal in today's architectural practice. In order to improve energy consumption of buildings without sacrificing indoor comfort, careful consideration of design decisions is needed. Simulation tools provide a solution to one aspect arising from this need, namely the...conference paper 2016
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Bahamonde, Juan S. (author), Pini, M. (author), Colonna, Piero (author)The fluid dynamic preliminary design of unconventional turbomachinery is customary done with meanline design procedures coupled with gradient-free optimizers. This method features various drawbacks, since it might become computationally expensive, and it does not provide design insights or guidelines to the designer. This work proposes a...conference paper 2016
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Lambers, A.C. (author)Aircraft concepts with high aspect ratio wings have been investigated more extensively in the recent past, as such configurations would reduce the induced drag significantly. At the same time, the high aspect ratio challenges the wing’s aero-structural stability (flutter). Therefore there is a need to perform aero-structural analysis already...master thesis 2016
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Wolken, M. (author)A surrogate model is used to predict the energy dissipation response for a rectangular beam, initiated by an axial impact. This method is used for one type of steel, after which a generalization is performed to make it available for multiple types of metal.master thesis 2017
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Ketelaars, Martijn (author)During aircraft design,multiple tools are utilised to inspect the performance of the configuration. As the design matures, higher fidelity analyses are conducted to predict the flight dynamics of the aircraft. These analyses are conducted by using semi-empirical relations, numerically analysing flow behaviour, conducting wind-tunnel tests and...master thesis 2017
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Bellos, Vasilis (author), Kourtis, Ioannis M. (author), Moreno Rodenas, A. (author), Tsihrintzis, Vassilios A. (author)A methodology is presented which can be used in the evaluation of parametric uncertainty in urban flooding simulation. Due to the fact that such simulations are time consuming, the following methodology is proposed: (a) simplification of the description of the physical process; (b) derivation of a training data set; (c) development of a data...journal article 2017
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Mahmoodian, M. (author), Torres-Matallana, Jairo Arturo (author), Leopold, Ulrich (author), Schutz, Georges (author), Clemens, F.H.L.R. (author)In this study, applicability of a data-driven Gaussian Process Emulator (GPE) technique to develop a dynamic surrogate model for a computationally expensive urban drainage simulator is investigated. Considering rainfall time series as the main driving force is a challenge in this regard due to the high dimensionality problem. However, this...journal article 2018
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Mahmoodian, M. (author), Carbajal, Juan Pablo (author), Bellos, Vasilis (author), Leopold, Ulrich (author), Schutz, Georges (author), Clemens, F.H.L.R. (author)Urban drainage modelling typically requires development of highly detailed simulators due to the nature of various underlying surface and drainage processes, which makes them computationally too expensive. Application of such simulators is still challenging in activities such as real-time control (RTC), uncertainty quantification analysis or...journal article 2018
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Alba, Christian (author), Elham, Ali (author), German, Brian J. (author), Veldhuis, L.L.M. (author)This paper presents a multi-disciplinary design optimization (MDO) framework for design of a general aviation aircraft wing considering the effects of tractor propellers on the wing aerodynamic characteristics. In pursuit of this objective, a wing–propeller full-interaction aerodynamic routine was developed and integrated with structural and...journal article 2018
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Gkoutis, Konstantinos (author)Surrogate modeling is a family of engineering techniques that attracts great interest today and can be applied in many challenging fields. A big advantage of it is that surrogate models (models based on these techniques) offer reliable results by being computationally cheaper than other candidate models. The savings in computational time is...master thesis 2018
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Bailleul, Wouter (author)Surrogate models are used to approximate the expensive ‘true’ simulation codes and thus have the potential to speed up the wind farm layout optimisation problem (WFLOP). One technique to make surrogate models is Polynomial Chaos Expansion (PCE). PCE can approximate a (wind farm) model by using orthogonal polynomials which are constructed based...master thesis 2018
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Papp, David (author)New generation combat aircraft are expected to operate over extended flight envelopes, including flight at high flow angles and rapid maneuvers. Conditions beyond traditional limits are giving rise to nonlinear phenomena, such as flow separation, large scale energetic vortices, fluctuations etc. These phenomena have significant impact on...master thesis 2018
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Moreno Rodenas, A. (author), Bellos, V. (author), Langeveld, J.G. (author), Clemens, F.H.L.R. (author)This work presents a method to emulate the flow dynamics of physically based hydrodynamic simulators under variations of time-dependent rainfall and parametric scenarios. Although surrogate modelling is often employed to deal with the computational burden of this type of simulators, common techniques used for model emulation as polynomial...journal article 2018
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Li, Ang (author)Structural optimization for crashworthiness in composite structures has become an important topic of research in aerospace, attributable to its proven benefits to the occupants' safety in an aircraft during a crash event. This thesis provides a comprehensive investigation on LS-DYNA modeling and design optimization of composite square tubes for...master thesis 2019