Acoustic source localization in anisotropic plates without knowing their material properties: An experimental investigation

Novonil Sen, Mateusz Gawroński, Pawel Packo, Tadeusz Uhl, Tribikram Kundu

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

2 Scopus citations

Abstract

An integral aspect of modern infrastructural engineering is to constantly monitor the health of a structure either actively or passively in order to ensure its safe performance throughout the design life. For passive structural health monitoring, it is important to estimate the location of an acoustic source that may be caused by events such as impact of a foreign object with the structure, failure of a structural element, formation of cracks, etc. Such an acoustic source generates acoustic waves that propagate through the medium. These waves can be captured by ultrasonic sensors mounted on the structure at some pre-selected locations and, subsequently, analyzed to predict the location of the acoustic source. Over the years, several researchers have proposed techniques for acoustic source localization in both isotropic and anisotropic structures. While acoustic source localization in isotropic structures is relatively simple, introduction of anisotropy adds a layer of difficulty to the problem due to the fact that waves do not propagate with the same speed in all directions. This study presents acoustic source localization techniques for anisotropic plates based on the analysis of the wave front shapes typically observed in anisotropic plates and presents experimental verification of the techniques. Three different geometric shapes are considered as the assumed wave front shapes: a rhombus, an ellipse and a parametric curve. A slightly modified version of the rhombus-based technique from the original approach is proposed. The experimental study is performed on two plates with different degrees of anisotropy.

Original languageEnglish (US)
Title of host publicationHealth Monitoring of Structural and Biological Systems XIII
EditorsPaul Fromme, Zhongqing Su
PublisherSPIE
ISBN (Electronic)9781510625990
DOIs
StatePublished - Jan 1 2019
EventHealth Monitoring of Structural and Biological Systems XIII 2019 - Denver, United States
Duration: Mar 4 2019Mar 7 2019

Publication series

NameProceedings of SPIE - The International Society for Optical Engineering
Volume10972
ISSN (Print)0277-786X
ISSN (Electronic)1996-756X

Conference

ConferenceHealth Monitoring of Structural and Biological Systems XIII 2019
CountryUnited States
CityDenver
Period3/4/193/7/19

Keywords

  • Acoustic source
  • Acoustic source localization
  • Anisotropic structures
  • Experimental verification
  • Passive structural health monitoring
  • Ultrasonic sensors
  • Wave front shapes

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Computer Science Applications
  • Applied Mathematics
  • Electrical and Electronic Engineering

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  • Cite this

    Sen, N., Gawroński, M., Packo, P., Uhl, T., & Kundu, T. (2019). Acoustic source localization in anisotropic plates without knowing their material properties: An experimental investigation. In P. Fromme, & Z. Su (Eds.), Health Monitoring of Structural and Biological Systems XIII [1097224] (Proceedings of SPIE - The International Society for Optical Engineering; Vol. 10972). SPIE. https://doi.org/10.1117/12.2513467