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Research Papers

Sound Transmission Characteristics of Asymmetric Sandwich Panels

[+] Author and Article Information
Ran Zhou1

Department of Mechanical Engineering, Auburn University, Auburn, AL 36849zhouran@auburn.edu

Malcolm J. Crocker

Department of Mechanical Engineering, Auburn University, Auburn, AL 36849crockmj@auburn.edu

1

Corresponding author.

J. Vib. Acoust 132(3), 031012 (May 13, 2010) (7 pages) doi:10.1115/1.4000786 History: Received April 10, 2009; Revised September 28, 2009; Published May 13, 2010; Online May 13, 2010

Governing equations for the forced vibration of asymmetric sandwich panels are developed from energy relationships. A wave impedance analysis model for the sound transmission loss of asymmetric sandwich panels is presented. The wave impedance analysis model is compared with other wave impedance analysis models for sandwich panels. Comparisons between predictions of the sound transmission loss of two sandwich panels obtained from two wave impedance analysis models for asymmetric sandwich panels are given.

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Copyright © 2010 by American Society of Mechanical Engineers
Topics: Sound , Waves , Equations , Vibration
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References

Figures

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Figure 1

The geometry and loads of a sandwich panel

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Figure 2

Symmetric and antisymmetric face sheet displacements

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Figure 3

Components of sound pressure fields on a sandwich panel

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Figure 4

Predicted sound transmission loss values of sandwich panel A for vibration waves traveling in the x-axis direction (ϕ=0 deg): – – – our model (t1=t2); –+– our model (t1=2t2); and — Dym and Lang’s model (t1=2t2)

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Figure 5

Predicted sound transmission loss values of sandwich panel A(t1=t2): ▼ experimental values; ⋯⋯ field incidence mass law; –★– TL; ––– TL for vibration waves traveling in the y-axis direction (ϕ=90 deg); and ⋅–⋅– TL for vibration waves traveling in the x-axis direction (ϕ=0 deg)

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Figure 6

Predicted sound transmission loss values of sandwich panel B: — our model (t1=t2); – – – our model, (t1=2t2); –⋅– Dym and Lang’s model (t1=t2); ⋯⋯ Dym and Lang’s model (t1=2t2); and –+– field incidence mass law

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