Approximate solutions to acoustic scattering from a ribbed finite plate
| Autor: | Gérard Maze, Michel Tran-Van-Nhieu, Dominique Décultot |
|---|---|
| Přispěvatelé: | Laboratoire Ondes et Milieux Complexes (LOMC), Centre National de la Recherche Scientifique (CNRS)-Université Le Havre Normandie (ULH), Normandie Université (NU)-Normandie Université (NU) |
| Jazyk: | angličtina |
| Rok vydání: | 2017 |
| Předmět: |
Physics
[PHYS]Physics [physics] Acoustics and Ultrasonics Rank (linear algebra) Scattering Acoustics Mathematical analysis Near and far field Surface pressure 01 natural sciences Expression (mathematics) 03 medical and health sciences 0302 clinical medicine Arts and Humanities (miscellaneous) 0103 physical sciences Reflection (physics) 030223 otorhinolaryngology 010301 acoustics Structural acoustics Beam (structure) ComputingMilieux_MISCELLANEOUS |
| Zdroj: | Journal of the Acoustical Society of America Journal of the Acoustical Society of America, Acoustical Society of America, 2017, 141 (5), pp.3091-3100. ⟨10.1121/1.4982039⟩ |
| ISSN: | 0001-4966 1520-8524 |
| DOI: | 10.1121/1.4982039⟩ |
| Popis: | Acoustic scattering from a finite plate reinforced by parallel ribs with arbitrary rib spacing is investigated by applying thin plate and beam theories. The modal component of the surface pressure is calculated by an asymptotic expression that is only valid for higher-order modes at high frequencies. An approximate expression is derived for the far field scattered pressure by inverting matrices the rank of which is equal to twice the number of ribs. When the ribs are regularly spaced, approximate analytical expressions are proposed to calculate Bragg and forward Bloch-Floquet waves scattering separately from backward Bloch-Floquet waves scattering. These solutions are useful to deal with scattering problems where flexural waves are strongly attenuated after reflection on the edges of the plate. Finally the relevancy of the approximate expressions is evaluated by comparing numerical simulations to experimental data. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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