Low-frequency breakdown of boundary element formulation for closed cavities in excitation conditions with a ?breathing?-type component
| Autor: | Søren Tørholm Christensen, Sergey Sorokin |
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| Rok vydání: | 2000 |
| Předmět: |
Component (thermodynamics)
Applied Mathematics Structural acoustic General Engineering Mechanics Type (model theory) Low frequency Classical mechanics Computational Theory and Mathematics Simple (abstract algebra) Modeling and Simulation Sound pressure Structural acoustics Boundary element method Software Excitation Mathematics |
| Zdroj: | Sorokin, S & Christensen, S T 2000, ' Low-Frequency Breakdown of Boundary Element Formulation for Closed Cavities in Excitation Conditions with a "Breathing"-Type Component ', International Journal for Numerical Methods in Biomedical Engineering, vol. 16, pp. 325-334 . Aalborg University |
| ISSN: | 1099-0887 1069-8299 |
| DOI: | 10.1002/(sici)1099-0887(200005)16:5<325::aid-cnm339>3.0.co;2-g |
| Popis: | 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 fluid–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. Copyright © 2000 John Wiley & Sons, Ltd. |
| Databáze: | OpenAIRE |
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