The aim of this research is to characterize the guided waves behavior in a seven wire strand with particular interest to the dispersive waves attenuation. Here, a pilot study is carried out on a carbon-fiber-reinforced-polymer (CFRP) wire to test a new signal processing procedure aimed at the extraction of the dispersive waves attenuation. The approach uses a novel timefrequency transform (TFR) capable to isolate the dispersive behavior of a single mode from a multimodal and dispersive recorded time-waveform. This TFR, called “Warped Frequency Transform” (WFT), is based on a time-frequency domain tiling chosen to match the spectro-temporal structure of the different propagating guided waves. The WFT is used to highlight the energy content of a guided wave traveling along the wire at different locations from which its dispersive attenuation information can be extracted. Here, the longitudinal L(0,1) wave in a single CFRP wire is studied.

A. Marzani, L. De Marchi, N. Speciale, P. Rizzo (2009). High frequency guided waves in a 7 wire strand: Warped Frequency Transform for spectro-temporal characterization. ROMA : IEEE UFFC Society.

High frequency guided waves in a 7 wire strand: Warped Frequency Transform for spectro-temporal characterization

MARZANI, ALESSANDRO;DE MARCHI, LUCA;SPECIALE, NICOLO'ATTILIO;
2009

Abstract

The aim of this research is to characterize the guided waves behavior in a seven wire strand with particular interest to the dispersive waves attenuation. Here, a pilot study is carried out on a carbon-fiber-reinforced-polymer (CFRP) wire to test a new signal processing procedure aimed at the extraction of the dispersive waves attenuation. The approach uses a novel timefrequency transform (TFR) capable to isolate the dispersive behavior of a single mode from a multimodal and dispersive recorded time-waveform. This TFR, called “Warped Frequency Transform” (WFT), is based on a time-frequency domain tiling chosen to match the spectro-temporal structure of the different propagating guided waves. The WFT is used to highlight the energy content of a guided wave traveling along the wire at different locations from which its dispersive attenuation information can be extracted. Here, the longitudinal L(0,1) wave in a single CFRP wire is studied.
2009
2009 IEEE International Ultrasonics Symposium Proceedings
1503
1506
A. Marzani, L. De Marchi, N. Speciale, P. Rizzo (2009). High frequency guided waves in a 7 wire strand: Warped Frequency Transform for spectro-temporal characterization. ROMA : IEEE UFFC Society.
A. Marzani; L. De Marchi; N. Speciale; P. Rizzo
File in questo prodotto:
Eventuali allegati, non sono esposti

I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.

Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11585/88656
 Attenzione

Attenzione! I dati visualizzati non sono stati sottoposti a validazione da parte dell'ateneo

Citazioni
  • ???jsp.display-item.citation.pmc??? ND
  • Scopus 1
  • ???jsp.display-item.citation.isi??? ND
social impact