Time reverse characterization of sources in heterogeneous media
METADATA ONLY
Loading...
Author / Creator
Date
2011-12
Publication Type
Journal Article
ETH Bibliography
yes
Citations
Altmetric
METADATA ONLY
Data
Rights / License
Abstract
Time reverse modeling of wave propagation in elastic media is applied to localize and characterize acoustic emission using a numerical concrete model. The aim is to transform a specific method within exploration geophysics to non-destructive testing. In contrast to previous standard localization techniques, no single event or first onset time identification is applied. The method is described and illustrated with synthetic data. Time reverse localization and characterization with limited knowledge of boundary values are feasible using the rotated staggered finite-difference method. Several imaging conditions are applied and compared to each other. We demonstrate the localization of two synchronous acoustic emissions with a limited number of sensors and using effective elastic properties. The imaging condition based on the maximum energy density is most indicative. Source characteristics can also be recovered. The goal is to apply our method to acoustic emissions measured during experiments carried out on concrete and reinforced concrete specimen. Several aspects of the described methodology can also be transferred back to exploration geophysics. © 2011 Elsevier Ltd. All Rights Reserved.
Permanent link
Publication status
published
External links
Editor
Book title
Volume
44 (8)
Pages / Article No.
751 - 759
Publisher
Elsevier
Event
Edition / version
Methods
Geographic location
Date collected
Date created
Subject
Time reverse imaging; Concrete; Acoustic emission; Localization; Finite-differences; Effective elastic properties
Organisational unit
Notes
Received 2 November 2010. Revised 5 July 2011. Accepted 21 July 2011. Published online 30 July 2011.