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Nonlinear Time Reversal Tomography of Structural Defects
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SYSNO ASEP 0334392 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Ostatní články Title Nonlinear Time Reversal Tomography of Structural Defects Author(s) Vejvodová, Šárka (UT-L)
Převorovský, Zdeněk (UT-L) RID
Dos Santos, S. (FR)Source Title POMA - ISSN N
Roč. 3, č. 1 (2009), 045003-045010Number of pages 11 s. Action ICNEM /14/ Event date 01.06.2009 - 06.06.2009 VEvent location Lisabon Country PT - Portugal Event type WRD Language eng - English Country US - United States Keywords nonlinear elastic wave spectroscopy (NEWS) ; DORT method ; time reversal (TR) Subject RIV BI - Acoustics R&D Projects GA106/07/1393 GA ČR - Czech Science Foundation (CSF) FR-TI1/198 GA MPO - Ministry of Industry and Trade (MPO) CEZ AV0Z20760514 - UT-L (2005-2011) DOI org/10.1121/1.3231998 Annotation A modification of TR-NEWS is proposed in this paper, referred to as Nonlinear Time Reversal Tomography. The procedure uses transducer array providing improvement of damaged zone localization. DORT method, enhanced by focused beams and virtual transducers concepts (FDORT) is used to derive Green’s function of defects. The TR-NEWS procedure is completed by the Excitation Symmetry Analysis Method (ESAM) as to extract 3rd order nonlinearities from spectral matrices along different wave-paths. Test results, obtained on metallic and composite parts, illustrate performance of the proposed procedure. Advantages of TR-NEWS tomography are in their potentiality to acquire very complex information about the tested structure. Workplace Institute of Thermomechanics Contact Marie Kajprová, kajprova@it.cas.cz, Tel.: 266 053 154 ; Jana Lahovská, jaja@it.cas.cz, Tel.: 266 053 823 Year of Publishing 2010
Number of the records: 1