Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 6 of 6 for “"Wave propagation problem"”.
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Design optimization of acoustic metamaterials and phononic crystals with a time domain method
… with periodic arrays of cylinders. The acoustic wave propagation problem is solved in the time-domain using a Streamline Upwind/Petrov Galerkin formulation. Topology parameterization is accomplished using the homogenization method, and shape optimization is subsequently used afterwards to refine …
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Higher order numerical schemes for propagation of wind wave spectra
Spectral wind wave models seek to solve a four-dimensional energy (or action) balance equation for values of the spectrum discretized in frequency and direction of propagation at fixed positions in space. When modeling an ocean area of any appreciable size, computational time and storage capacity …
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On numerical methods for direct and inverse problems in electromagnetism
… is devoted to the study of processes in the propagation of electromagnetic fields. We do not aim at one particular problem, actually very different kinds of topics are analyzed here. We deal with direct problems as well as with inverse ones, low frequency electromagnetism is discussed and …
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Experimental studies of wave propagation in three-dimensional photonic crystals
… crystals were proposed fifteen years ago. Propagation is selectively prevented through these crystals resulting in a photonic band gap, that is, a frequency region where light cannot propagate. These frequency bands are analogous to electronic band gaps in solid-state crystals. The optical …
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Splitting solution scheme for material point method
… modelling large deformations of solid mechanics problems. Due to the particle based spatial discretiza- tion, MPM is naturally capable of handling large mass movements together with topological changes. Further, the Lagrangian particles in MPM allow an easy implementation of history dependent …
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The non-symmetric coupling of virtual and boundary elements for wave propagation problems in unbounded domains
L'abstract è presente nell'allegato / the abstract is in the attachment