Attenuation measurement of cylindrical guided waves

Fumiko Aoki, Kosuke Kanda, Toshihiko Sugiura

Research output: Contribution to journalArticle

1 Citation (Scopus)

Abstract

Guided waves can propagate along waveguides with low attenuation. Therefore, guided waves are expected to be used for non-destructive testing especially of cylindrical structures such as wire-ropes. However, as guided waves propagate over longer distance, their attenuation cannot be neglected, though quantitative measurement of attenuation of cylindrical guided waves has not yet been given enough. Thus, we conducted theoretical analysis and experiment of wave attenuation. In theoretical analysis, we derived dispersion curves including effects of material attenuation in order to obtain frequency-dependent attenuation coefficients. In experiment, we transmitted and received guided waves by electromagnetic acoustic transducers (EMATs) in order to measure attenuation of guided waves. By comparing the experimental results with the theoretical ones, we showed that the experimental results of wave attenuation increased with frequency just as the theoretical ones, though the formers were larger than the latters.

Original languageEnglish
Pages (from-to)1201-1206
Number of pages6
JournalInternational Journal of Applied Electromagnetics and Mechanics
Volume52
Issue number3-4
DOIs
Publication statusPublished - 2016

Keywords

  • attenuation
  • Cylindrical guided waves
  • EMATs

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering
  • Electrical and Electronic Engineering

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