Searched for: subject%3A%22shape%255C%2Boptimization%22
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Wang, Weiming (author), Liu, Yong-Jin (author), Wu, J. (author), Tian, Shengjing (author), Wang, C.C. (author), Liu, Ligang (author), Liu, Xiuping (author)
Offsetting-based hollowing is a solid modeling operation widely used in 3D printing, which can change the model's physical properties and reduce the weight by generating voids inside a model. However, a hollowing operation can lead to additional supporting structures for fabrication in interior voids, which cannot be removed. As a consequence...
journal article 2018
document
Swierstra, Marco (author)
Structural design optimization is the process of obtaining an optimized structure while satisfying a set of criteria. The process can be divided into three stages: topology optimization (stage one), geometry extraction (stage two) and shape optimization (stage three). The last two stages are regarded to be the post-processor of topology...
master thesis 2017
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Wang, Z. (author), Turteltaub, S.R. (author), Abdalla, M.M. (author)
This work is concerned with the development of a framework to solve shape optimization problems for transient heat conduction problems within the context of isogeometric analysis (IGA). A general objective functional is used to accommodate both shape optimization and passive control problems under transient conditions. An adjoint sensitivity...
journal article 2017
document
Wang, Zhen Pei (author), Abdalla, M.M. (author), Turteltaub, S.R. (author)
In isogeometric shape optimization, the use of the search direction directly predicted from the discrete shape gradient makes the optimization history strongly dependent on the discretization. This discretization-dependency can affect the convergence and may lead the optimization process into a sub-optimal solution. The source of this...
journal article 2017
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Delissen, A.A.T.M. (author), Radaelli, G. (author), Herder, J.L. (author)
A zero free length (ZFL) spring is a spring with special properties, which is commonly used in static balancing. Existing methods to create ZFL springs all have their specific drawbacks, which rises to the need of a new method to create such a spring. A method is proposed to design planar ZFL springs with specified stiffness (250–750 N/m)...
journal article 2017
document
Van Kempen, R.B. (author)
Energy harvesting is the process by which energy is derived from environmental vibrations in order to power local electronic systems . The technology gets rid of the need for electrical wires or batteries in a wide range of sensor and communication networks. This work tackles the three most challenging aspects in the field of vibration energy...
master thesis 2016
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Wang, Z.P. (author)
The recently developed isogeometric analysis (IGA) was aimed, from the start, at integrating computer aided design (CAD) and analysis. This synthesis of geometry and analysis has naturally led to renewed interest in developing structural shape optimization. The advantages of using isogeometric analysis in shape optimization are embodied in its...
doctoral thesis 2016
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Yan, D. (author)
master thesis 2014
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Dang Manh, N. (author), Evgrafov, A. (author), Gravesen, J. (author), Lahaye, D. (author)
Purpose: The waste recycling industry increasingly relies on magnetic density separators. These devices generate an upward magnetic force in ferro-fluids allowing to separate the immersed particles according to their mass density. Recently a new separator design that significantly reduces the required amount of permanent magnet material has been...
report 2013
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Tang, X. (author), Bassir, D.H. (author), Zhang, W. (author)
In this work, we explore simultaneous designs of materials selection and structural optimization. As the material selection turns out to be a discrete process that finds the optimal distribution of materials over the design domain, it cannot be performed with common gradient-based optimization methods. In this paper, material selection is...
journal article 2010
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Carpentieri, G. (author)
This thesis presents a shape optimization framework for problems that are encountered routinely in Aerodynamic Design. The nature of the framework is numerical. Its focus is wide as different aspects of the shape optimization practice are treated, e.g., the solution of the flow equations, the sensitivity analysis and the parameterization of the...
doctoral thesis 2009
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Langelaar, M. (author)
This thesis explores the possibilities of design optimization techniques for designing shape memory alloy structures. Shape memory alloys are materials which, after deformation, can recover their initial shape when heated. This effect can be used for actuation. Emerging applications for shape memory alloys are e.g. miniaturized medical...
doctoral thesis 2006
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Desideri, J.A. (author), Dervieux, A. (author)
This lecture is devoted to the presentation of two particular "hierarchical" approaches to numerical shape optimization in aerodynamics design: 1) multilevel parametric shape optimization algorithms; 2) additive preconditioners. The first approach is inspired from the classical geometrical multigrid method, except that here the geometrical...
conference paper 2006
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Gauger, N.R. (author)
Because detailed aerodynamic shape optimizations still suffer from high computational costs, efficient optimization strategies are required. Regarding the deterministic optimization methods, the adjoint approach is seen as a promising alternative to the classical finite difference approach. With the adjoint approach the sensitivities needed for...
conference paper 2006
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Peter, J. (author), Mayeur, J. (author)
This paper describes the recent activities developed at ONERA in the field of aerodynamic shape optimization using gradient based methods. Both discrete direct differentiation method and discrete adjoint method have been considered for the computation of the derivatives of a function with respect to the design parameters. The numerical methods...
conference paper 2006
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Peigin, S. (author), Epstein, B. (author)
Blended Wing Body (BWB) Aircraft has aroused a considerable interest as a potential candidate for future large subsonic transport air-vehicles. In this paper, we present the results of one and multi-point multi-constrained optimization of a BWB configuration for minimum total drag. The optimization technique is based on Genetic Algorithms and is...
conference paper 2006
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Carpentieri, G. (author), Van Tooren, M.J.L. (author), Koren, B. (author)
An optimization framework for aerodynamic design on unstructured meshes has been implemented. It includes a finite volume solver based upon a median-dual discretization, its discrete adjoint, and shape parameterization and mesh moving/deforming algorithms. The framework elements are coupled and linked to a Sequential Quadratic Programming (SQP)...
conference paper 2006
document
Dvorak, V. (author)
This contribution deals with aerodynamic optimization using dynamic mesh method provided by Fluent software. A method of transformation of coordinates and an optimization procedure enabling to obtain arbitrary shape of computing mesh are described. This method was developed for shape optimization of axisymmetric ejector in order to obtain the...
conference paper 2006
document
Carpentieri, G. (author), Van Tooren, M.J.L. (author), Koren, B. (author)
An optimization framework for aerodynamic design on unstructured meshes has been implemented. It includes a finite volume solver based upon a median-dual discretization, its discrete adjoint, and shape parameterization and mesh moving/deforming algorithms. The framework elements are coupled and linked to a Sequential Quadratic Programming (SQP)...
conference paper 2006
Searched for: subject%3A%22shape%255C%2Boptimization%22
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