Szczegóły publikacji
Opis bibliograficzny
Flexural wave energy manipulation by a cluster of nonlinear scatterers / Angelis KARLOS, Paweł PAĆKO, Andrew N. Norris // W: ICSV27 [Dokument elektroniczny] : advances in acoustics, noise and vibration - 2021 : proceedings of the 27th International Congress on Sound and Vibration : the annual congress of the International Institute of Acoustics and Vibration (IIAV) : 11–16 July, 2021, [virtual] / ed. by Eleonora Carletti, [et al.]. — Wersja do Windows. — Dane tekstowe. — Gliwice : Silesian University Press, cop. 2021. — (Proceedings of the ... International Congress on Sound and Vibration ; ISSN 2329-3675). — e-ISBN: 978-83-7880-799-5. — S. 1–8. — Wymagania systemowe: Adobe Reader. — Tryb dostępu: https://iiav.org/content/archives_icsv_last/2021_icsv27/conte... [2021-11-03]. — Bibliogr. s. 8
Autorzy (3)
- AGHKarlos Angelis
- AGHPaćko Paweł
- Norris Andrew N.
Słowa kluczowe
Dane bibliometryczne
| ID BaDAP | 137447 |
|---|---|
| Data dodania do BaDAP | 2021-11-26 |
| Rok publikacji | 2021 |
| Typ publikacji | materiały konferencyjne (aut.) |
| Otwarty dostęp |  |
| Wydawca | Uniwersytet Śląski w Katowicach |
| Czasopismo/seria | Proceedings of the ... International Congress on Sound and Vibration |
Abstract
Point attachments scattering vibrational energy can be used to manipulate incident waves in terms of frequency-dependent reflection and transmission. In general, a combination of scatterers of different properties results in specific propagation and absorption behavior at different directions, depending also on the direction of incidence. The manipulation capabilities of a cluster may also include energy transfer between different frequency bands if the nonlinear properties of the attachments are considered. In this article, the multiple scattering problem for a cluster of nonlinear point scatterers on a beam is formulated and solved through a perturbation strategy. Apart from the linear attachment force on the beam, an additional nonlinear force with cubic dependence with the displacement is considered. A perturbation analysis of the equation of motion is used to derive the displacement field of the system. It is shown that the cubic nonlinearity generates harmonics at three times the fundamental frequency, along with shifting the response at the fundamental. Depending on the selection of the number of scatterers, their positions and impedance properties, various wave manipulation effects and devices are possible; for instance, suppression of the reflection and transmission at the fundamental frequency, while producing a non-symmetric scattered field at higher harmonics, resulting in a device that transfers energy from one frequency band to another.
