期刊
JOURNAL OF THE ACOUSTICAL SOCIETY OF AMERICA
卷 142, 期 5, 页码 3205-3215出版社
ACOUSTICAL SOC AMER AMER INST PHYSICS
DOI: 10.1121/1.5011946
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资金
- Ministerio de Economa y Competitividad of the Spanish government
- European Union Fondo Europeo de Desarrollo Regional (FEDER) [TEC2014-53088-C3-1-R]
- National Science Foundation of China [11432004]
- China Scholarship Council [201606120070]
The impedance matrix method is applied to study the scattering of flexural waves propagating in an infinite thin plate containing an N-beam resonator. The resonator consists of a circular hole containing a smaller plate connected to the background plate by a number N of rectangular beams. After representing the boundary conditions in a modal multipole expansion form, a compact expression is obtained for the T-matrix, which relates the incident and the scattered transverse (out-of-plane) waves. The analysis of the scattering cross-section reveals interesting scattering features, like resonances and anisotropy, associated to this type of resonators. Numerical experiments performed within the framework of the finite element method support the accuracy of the model here developed. (C) 2017 Acoustical Society of America.
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