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Analysis of absorption performances of anechoic layers with steel plate backing
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10.1121/1.4728198
/content/asa/journal/jasa/132/1/10.1121/1.4728198
http://aip.metastore.ingenta.com/content/asa/journal/jasa/132/1/10.1121/1.4728198

Figures

Image of FIG. 1.
FIG. 1.

The sketch of the structure model. The incident plane wave enters form the negative of z-axis. (a) The homogenous slab, (b) the Alberich anechoic layer, and (c) the local resonance slab.

Image of FIG. 2.
FIG. 2.

(Color online) Comparison of the absorptances of the homogenous slab with different backings. Solid line: water backing. Dash dotted line: steel plate backing.

Image of FIG. 3.
FIG. 3.

(Color online) The displacement vectors graph of a unit cell of the homogenous slab on the zOx cross section with the steel plate backings. The incident wave enters the structure from the bottom of the panels. The arrows denote the displacement vectors of the nodes in the model.

Image of FIG. 4.
FIG. 4.

(Color online) Comparison of the absorptances of Alberich anechoic layer with different backings. Solid line: water backing. Dash dotted line: steel plate backing.

Image of FIG. 5.
FIG. 5.

(Color online) The displacement vectors graph of a unit cell of the Alberich anechoic layer on the zOx cross section with the steel plate backings. The incident wave enters the structure from the bottom of the panels. The arrows denote the displacement vectors of the nodes in the model. (a) The displacement vectors at 1680 Hz, and (b) the frequency of 4600 Hz.

Image of FIG. 6.
FIG. 6.

(Color online) Comparison of the absorptances of the local resonance slab with different backings. Solid line: water backing. Dash dotted line: steel plate backing.

Image of FIG. 7.
FIG. 7.

(Color online) The displacement vectors graph of a unit cell of the local resonance slab on the zOx cross section with the steel plate backings. The incident wave enters the structure from the bottom of the panels. (a) The displacement vectors on the cross-section at 1070 Hz, and (b) the frequency of 2500 Hz.

Image of FIG. 8.
FIG. 8.

(Color online) Comparison of the absorptances of the local resonance slab with different thicknesses. Solid line: the 1-layer local resonance slab. Dash dotted line: the 2-layers local resonance slab.

Image of FIG. 9.
FIG. 9.

(Color online) Comparison of the absorptances of the local resonance slab under the steel slab backings with different thicknesses. Dash dotted line: 6 mm-steel-slab. Dashed line: 10 mm-steel-slab. Solid line: 15 mm-steel-slab.

Image of FIG. 10.
FIG. 10.

Cross sections of the array of units embedded in the host rubber for the samples.

Image of FIG. 11.
FIG. 11.

Experimental absorption coefficients of the sample with the steelplate of different thickness. Solid line: 10 mm-steel-slab. Dashed line: 15 mm-steel-slab.

Tables

Generic image for table
TABLE I.

Physical parameters of materials for the local resonance slab.

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/content/asa/journal/jasa/132/1/10.1121/1.4728198
2012-07-10
2014-04-17
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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Analysis of absorption performances of anechoic layers with steel plate backing
http://aip.metastore.ingenta.com/content/asa/journal/jasa/132/1/10.1121/1.4728198
10.1121/1.4728198
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