期刊
MECHANICAL SYSTEMS AND SIGNAL PROCESSING
卷 68-69, 期 -, 页码 462-478出版社
ACADEMIC PRESS LTD- ELSEVIER SCIENCE LTD
DOI: 10.1016/j.ymssp.2015.06.027
关键词
Parameter estimation; Poroelastic Biot theory; Optimisation; Kundt tube; Wave Based Method
资金
- Institute for Promotion of Innovation by Science and Technology Flanders (Belgium) (IWT-Vlaanderen)
- Research Fund KU Leuven
The Biot theory is commonly used for the simulation of the vibro-acoustic behaviour of poroelastic materials. However, it relies on a number of material parameters. These can be hard to characterize and require dedicated measurement setups, yielding a time-consuming and costly characterisation. This paper presents a characterisation method which is able to identify all material parameters using only an impedance tube. The method relies on the assumption that the sample is clamped within the tube, that the shear wave is excited and that the acoustic field is no longer one-dimensional. This paper numerically shows the potential of the developed method. It therefore performs a sensitivity analysis of the quantification parameters, i.e. reflection coefficients and relative pressures, and a parameter estimation using global optimisation methods. A 3-step procedure is developed and validated. It is shown that even in the presence of numerically simulated noise this procedure leads to a robust parameter estimation. (C) 2015 Elsevier Ltd. All rights reserved.
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