A new procedure for detecting the presence, position and size of structural defects in Hopkinson bars is discussed. The acquisition system is based on a phonometer linked up a recording system and a calculus code to process the acoustic vibrations data acquired at bars end. The technique for data processing is mainly based on the triple Fourier transform of the diagnostic signal acquired in the time domain. The procedure allows the detection of a defect of only 5% of the bar cross-section.
The triple Fourier transform for structural diagnosis
BASSO, ROBERTO;FANTI, GIULIO
2000
Abstract
A new procedure for detecting the presence, position and size of structural defects in Hopkinson bars is discussed. The acquisition system is based on a phonometer linked up a recording system and a calculus code to process the acoustic vibrations data acquired at bars end. The technique for data processing is mainly based on the triple Fourier transform of the diagnostic signal acquired in the time domain. The procedure allows the detection of a defect of only 5% of the bar cross-section.
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