Low-frequency breakdown of boundary element formulation for closed cavities in excitation conditions with a ?breathing?-type component
✍ Scribed by Sorokin, Sergey ;Christensen, S�ren T�rholm
- Publisher
- John Wiley and Sons
- Year
- 2000
- Tongue
- English
- Weight
- 107 KB
- Volume
- 16
- Category
- Article
- ISSN
- 1069-8299
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✦ Synopsis
Solution of interior problems of structural acoustics by the boundary element method at low frequencies may be inaccurate due to the absence of a quasi-static component in the computed acoustic pressure. This part of the acoustic pressure is generated by uniform displacements of the #uid}structure interface (volume change). The contribution of this component to the overall acoustic pressure decays with frequency growth and at a certain frequency the accuracy of the solution is recovered. A simple approach is suggested to estimate this threshold value and its validity is illustrated by two examples.