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Localization of Acoustic Emissions in a Numerical T-Shaped Concrete Beam Using Multi-segment Path Analysis

2017; Springer Nature; Linguagem: Inglês

10.1007/978-3-319-29052-2_4

1867-4941

Stephan Gollob, Georg Karl Kocur, Thomas Vogel,

Seismic Waves and Analysis

Common source localization algorithms assume a straight-wave propagation path. If the straight connection between source and sensor passes air, this straight connection surely does not represent the wave propagation path. A crack can be such an air barrier between source and sensor. However, in case of complex specimens (e.g., T-shaped or C-shaped cross section) the straight connection between source and sensor can also pass the air surrounding the specimen. FastWay is a novel source localization method, based on multi-segmented path analysis and a heterogeneous velocity model. In order to determine the source location, the fastest wave travel path between the sensor and an estimated source location is determined. This wave travel path is multi-linear, bypasses air, and is based on a heterogeneous velocity model. In this chapter, the estimated source location of acoustic emissions within a numerically simulated T-shaped concrete beam, determined with FastWay, is compared with the results provided by a homogeneous and a heterogeneous Geiger method.