Elastodynamic Properties and Signal Propagation in Materials within Time Reversal Acoustics

0367950 - ÚT 2012 RIV CZ eng C - Conference Paper (international conference)
Farová, Zuzana - Převorovský, Zdeněk - Kůs, V. - Dos Santos, S.
Elastodynamic Properties and Signal Propagation in Materials within Time Reversal Acoustics.
Stochastic and Physical Monitoring Systems : SPMS 2011. Praha: České vysoké učení technické v Praze, 2011 - (Hobza, T.), s. 25-33. ISBN 978-80-01-04916-7.
[SPMS 2011. Křižánky (CZ), 27.06.2011-02.07.2011]
Institutional research plan: CEZ:AV0Z20760514
Keywords : time reversal acoustics * deconvolution * Green function
Subject RIV: BI - Acoustics

In this paper we present related parts of elastodynamic theory, which are a keynote for the wave propagation through the medium. We describe the basic material characteristics - strain tensor and stress tensor, also we provide the relations of these tensors and describe the derivation of the well-know Lame's parameters. Further, we deal with the theory of Green functions, its properties, and its form for di®erent sources. Finally, we propose and explain the so-called experimental deconvolution, quite newly developed technique, based on time reversal acoustics with the knowledge of Green function and using the Fourier transform.
Permanent Link: http://hdl.handle.net/11104/0202446