An improved DPSM technique for modelling ultrasonic fields in cracked solids

Sourav Banerjee, Tribikram Kundu, Dominique Placko

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

Abstract

In recent years Distributed Point Source Method (DPSM) is being used for modelling various ultrasonic, electrostatic and electromagnetic field modelling problems. In conventional DPSM several point sources are placed near the transducer face, interface and anomaly boundaries. The ultrasonic or the electromagnetic field at any point is computed by superimposing the contributions of different layers of point sources strategically placed. The conventional DPSM modelling technique is modified in this paper so that the contributions of the point sources in the shadow region can be removed from the calculations. For this purpose the conventional point sources that radiate in all directions are replaced by Controlled Space Radiation (CSR) sources. CSR sources can take care of the shadow region problem to some extent. Complete removal of the shadow region problem can be achieved by introducing artificial interfaces. Numerically synthesized fields obtained by the conventional DPSM technique that does not give any special consideration to the point sources in the shadow region and the proposed modified technique that nullifies the contributions of the point sources in the shadow region are compared. One application of this research can be found in the improved modelling of the real time ultrasonic non-destructive evaluation experiments.

Original languageEnglish (US)
Title of host publicationHealth Monitoring of Structural and Biological Systems 2007
DOIs
StatePublished - Nov 5 2007
EventHealth Monitoring of Structural and Biological Systems 2007 - San Diego, CA, United States
Duration: Mar 19 2007Mar 22 2007

Publication series

NameProceedings of SPIE - The International Society for Optical Engineering
Volume6532
ISSN (Print)0277-786X

Other

OtherHealth Monitoring of Structural and Biological Systems 2007
CountryUnited States
CitySan Diego, CA
Period3/19/073/22/07

Keywords

  • CRS
  • Controlled radiation sources
  • DPSM
  • Distributed point source method
  • Numerical modelling
  • Transducer radiation modelling
  • Ultrasonic field modelling

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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