Low-frequency acoustic absorption mechanism of a viscoelastic layer with resonant cylindrical scatterers | Zendy

Haibin Yang | Zendy; Yue Li | Zendy; Honggang Zhao | Zendy; Jihong Wen | Zendy; Xisen Wen | Zendy

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Low-frequency acoustic absorption mechanism of a viscoelastic layer with resonant cylindrical scatterers

Author(s) -

Haibin Yang,

Yue Li,

Honggang Zhao,

Jihong Wen,

Xisen Wen

Publication year - 2013

Publication title -

acta physica sinica

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.199

H-Index - 47

ISSN - 1000-3290

DOI - 10.7498/aps.62.154301

Subject(s) - viscoelasticity , mechanism (biology) , absorption (acoustics) , materials science , layer (electronics) , acoustics , constrained layer damping , physics , composite material , vibration , vibration control , quantum mechanics

This paper investigates low-frequency acoustic absorption mechanism of a viscoelastic layer with resonant cylindrical scatterers. The viscoelastic layer is 20 mm-thick, and the cylindrical scatterer is a cylindrical cavity coated with a soft rubber layer, with axis in the lateral layer direction. The absorption properties of the viscoelastic layer under the steel-backing condition are studied using the layer-multiple scattering method. Results show excellent absorption performance in the frequency region of 1000–3000 Hz. The absorption mechanism is investigated by analyzing the absorption cross-section of a single scatterer and the multiple scattering of a periodic array of scatterers, together with the displacement field and power dissipation density. Effects of the resonant absorption of a single scatterer and the coupling resonance between the absorption layer and the steel-backing are revealed.

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