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Deterministic and s...
Deterministic and statistical methods for the characterisation of poroelastic media from multi-observation sound absorption measurements
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- Cuenca, J. (författare)
- Siemens Ind Software, Interleuvenlaan 68, BE-3001 Leuven, Belgium.
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- Göransson, Peter, 1959- (författare)
- KTH,Strömningsmekanik och Teknisk Akustik
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- De Ryck, L. (författare)
- Siemens Ind Software, Interleuvenlaan 68, BE-3001 Leuven, Belgium.
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- Lahivaara, T. (författare)
- Univ Eastern Finland, Dept Appl Phys, POB 1627, FIN-70211 Kuopio, Finland.
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Siemens Ind Software, Interleuvenlaan 68, BE-3001 Leuven, Belgium Strömningsmekanik och Teknisk Akustik (creator_code:org_t)
- Elsevier BV, 2022
- 2022
- Engelska.
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Ingår i: Mechanical systems and signal processing. - : Elsevier BV. - 0888-3270 .- 1096-1216. ; 163
- Relaterad länk:
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https://doi.org/10.1...
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https://doi.org/10.1...
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https://urn.kb.se/re...
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https://doi.org/10.1...
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Abstract
Ämnesord
Stäng
- This paper proposes a framework for the estimation of the transport and elastic properties of open-cell poroelastic media based on sound absorption measurements. The sought properties are the Biot-Johnson-Champoux-Allard model parameters, namely five transport parameters, two elastic properties and the mass density, as well as the sample thickness. The methodology relies on a multi-observation approach, consisting in combining multiple independent measurements into a single dataset, with the aim of over-determining the problem. In the present work, a poroelastic sample is placed in an impedance tube and tested in two loading conditions, namely in a rigid-backing configuration and coupled to a resonant expansion chamber. Given the nonmonotonic nature of the experimental data, an incremental parameter estimation procedure is used in order to guide the model parameters towards the global solution without terminating at local minima. A statistical inversion approach is also discussed, providing refined point estimates, uncertainty ranges and parameter correlations. The methodology is applied to the characterisation of a sample of melamine foam and provides estimates of all nine parameters with compact uncertainty ranges. It is shown that the model parameters are retrieved with a lower uncertainty in the multi-observation case, as compared with a single-observation case. The method proposed here does not require prior knowledge of the thickness or any of the properties of the sample, and can be carried out with a standard two-microphone impedance tube.
Ämnesord
- NATURVETENSKAP -- Matematik -- Sannolikhetsteori och statistik (hsv//swe)
- NATURAL SCIENCES -- Mathematics -- Probability Theory and Statistics (hsv//eng)
Nyckelord
- Poroelastic media
- Parameter estimation
- Coupled problems
- Deterministic framework
- Bayesian framework
- Uncertainty quantification
Publikations- och innehållstyp
- ref (ämneskategori)
- art (ämneskategori)
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