Abstract
A series of digital frequency filters (DFFs) were designed to screen diverse noises and the spectrographic analysis was conducted to isolate complex boundary reflection, which obscures the damage-induced signals. The scale-averaged wavelet power (SAP) technique was applied to enhance the measurement accuracy of Time of Flight (TOF). As an example, the propagation characteristics of elastic wave in a structural beam of square cross-section were analyzed using such an approach and verified experimentally and numerically, with the consideration of the complicated wave scatter caused by the non-ignorable section dimensions.
| Original language | English |
|---|---|
| Pages (from-to) | 1141-1144 |
| Number of pages | 4 |
| Journal | Key Engineering Materials |
| Volume | 334-335 II |
| Publication status | Published - 21 Feb 2007 |
Keywords
- Damage identification
- Signal processing
- Structural health monitoring
- Time of flight
- Wave propagation
- Wavelet transform
ASJC Scopus subject areas
- Ceramics and Composites
- Chemical Engineering (miscellaneous)