Locating point of impact on an anisotropic cylindrical surface using acoustic beamforming technique

Hayato Nakatani, Talieh Hajzargarbashi, Kaita Ito, Tribikram Kundu, Nobuo Takeda

Research output: Chapter in Book/Report/Conference proceedingConference contribution

11 Scopus citations

Abstract

A beamforming array technique with four sensors is applied to a cylindrical geometry for detecting point of impact. A linear array of acoustic sensors attached to the plate record the waveforms of Lamb waves generated at the impact point with individual time delay. A beamforming technique in conjunction with an optimization scheme that incorporates the direction dependent guided Lamb wave speed in cylindrical plates is developed. The optimization is carried out using the experimentally obtained wave speed as a function of propagation direction. The maximum value in the beamforming plot corresponds to the predicted point of impact. The proposed technique is experimentally verified by comparing the predicted points with the exact points of impact on a cylindrical aluminum plate and a cylindrical composite shell. For randomly chosen points of impact the beamforming technique successfully predicts the location of the acoustic source.

Original languageEnglish (US)
Title of host publicationStructural Health Monitoring
Subtitle of host publicationResearch and Applications
PublisherTrans Tech Publications Ltd
Pages331-340
Number of pages10
ISBN (Print)9783037857151
DOIs
StatePublished - Jan 1 2013
Event4th Asia-Pacific Workshop on Structural Health Monitoring - Melbourne, VIC, Australia
Duration: Dec 5 2012Dec 7 2012

Publication series

NameKey Engineering Materials
Volume558
ISSN (Print)1013-9826
ISSN (Electronic)1662-9795

Other

Other4th Asia-Pacific Workshop on Structural Health Monitoring
CountryAustralia
CityMelbourne, VIC
Period12/5/1212/7/12

Keywords

  • Beamforming
  • Composite
  • Cylindrical surface
  • Guided wave
  • Impact
  • Optimization

ASJC Scopus subject areas

  • Materials Science(all)
  • Mechanics of Materials
  • Mechanical Engineering

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  • Cite this

    Nakatani, H., Hajzargarbashi, T., Ito, K., Kundu, T., & Takeda, N. (2013). Locating point of impact on an anisotropic cylindrical surface using acoustic beamforming technique. In Structural Health Monitoring: Research and Applications (pp. 331-340). (Key Engineering Materials; Vol. 558). Trans Tech Publications Ltd. https://doi.org/10.4028/www.scientific.net/KEM.558.331