A digital shearing speckle interferometry technique for modal analysis

T. W. Ng, F. S. Chau

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Abstract

Digital shearing speckle interferometry is a laser-based, optical, non-contacting and non-destructive method widely used for the stress and strain analysis of loaded static objects. In this paper, the authors have adapted the technique for whole-field modal analysis. The theoretical basis for this technique is presented and experimental verification is performed on a thin square plate fully constrained and subjected to a steady-state excitation.

Original languageEnglish
Pages (from-to)175-185
Number of pages11
JournalApplied Acoustics
Volume42
Issue number2
DOIs
Publication statusPublished - 1 Jan 1994
Externally publishedYes

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