Temat: Green's functions - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: Acoustical Boundary Elements : Theory and Virtual Experiments
Autorzy:: Piscoya, R.
Ochmann, M.
Powiązania:: https://bibliotekanauki.pl/articles/178118.pdf
Data publikacji:: 2014
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:: boundary elements
Green's functions
non-uniqueness
Opis:: This paper presents an overview of basic concepts, features and difficulties of the boundary element method (BEM) and examples of its application to exterior and interior problems. The basic concepts of the BEM are explained firstly, and different methods for treating the non-uniqueness problem are described. The application of the BEM to half-space problems is feasible by considering a Green’s Function that satisfies the boundary condition on the infinite plane. As a special interior problem, the sound field in an ultrasonic homogenizer is computed. A combination of the BEM and the finite element method (FEM) for treating the problem of acoustic-structure interaction is also described. Finally, variants of the BEM are presented, which can be applied to problems arising in flow acoustics.
Źródło:: Archives of Acoustics; 2014, 39, 4; 453-465
0137-5075
Pojawia się w:: Archives of Acoustics
Dostawca treści:: Biblioteka Nauki

Artykuł

Skocz do pozycji: 2.

Tytuł:: Analytical Model of Three-Dimensional Ultrasonic Beam Interaction with an Immersed Plate
Autorzy:: Soucrati, H.
Chitnalah, A.
Aouzale, N.
Jakjoud, H.
Powiązania:: https://bibliotekanauki.pl/articles/177031.pdf
Data publikacji:: 2018
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:: ultrasonic modeling
immersed plate
Gaussian beams decomposition
Green’s functions
NDUT
Opis:: This paper proposes an analytical model to describe the interaction of a bounded ultrasonic beam with an immersed plate. This model, based on the Gaussian beams decomposition, takes into account multiple reflections into the plate. It allows predicting three-dimensional spatial distributions of both transmitted and reflected fields. Thereby, it makes it easy to calculate the average pressure over the receiver’s area taking into account diffraction losses. So the acoustical parameters of the plate can be determined more accurately. A Green’s function for the interaction of an ultrasonic beam with the plate is derived. The obtained results are compared to those given by the angular spectrum approach. A good agreement is seen showing the validity of the proposed model.
Źródło:: Archives of Acoustics; 2018, 43, 4; 669-679
0137-5075
Pojawia się w:: Archives of Acoustics
Dostawca treści:: Biblioteka Nauki

Artykuł

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