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- W2981004080 abstract "Generation of elastic waves is a major issue in nondestructive testing. Structural health monitoring of a thin element can be achieved through the analysis of its resonance spectrum. A time reversal mirror (TRM) operating in the audible frequency range (1–10 kHz) is used to remotely excite thin resonant elastic elements. The generation of elastic waves is studied with respect to the geometry of the TRM. It is observed that the quality of focusing only weakly depends on the number of loudspeakers (LS) in the TRM. When the air/plate coupling is at its maximum, the energetic efficiency of the TRM is estimated to be about 0.02%. The TRM is shown to efficiently and selectively excite a small structure embedded in a complex environment such as a hollow cylinder. Finally, the results are discussed in light of the DORT method (French acronym for “decomposition of the time reversal operator”). In particular, the optimal LS placement and emission signals in this configuration to excite individual eigenmodes of a plate is determined." @default.
- W2981004080 created "2019-10-25" @default.
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- W2981004080 date "2019-10-01" @default.
- W2981004080 modified "2023-09-23" @default.
- W2981004080 title "Selective remote excitation of complex structures using time reversal in audible frequency range" @default.
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- W2981004080 doi "https://doi.org/10.1121/1.5129130" @default.
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