Mode shape comparison using continuous-scan laser doppler vibrometry and high speed 3D digital image correlation

David A. Ehrhardt, Shifei Yang, Timothy J. Beberniss, Matthew S. Allen

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

Abstract

Experimental structural dynamic measurements are traditionally obtained using discrete sensors such as accelerometers, strain gauges, displacement transducers, etc. These techniques are known for providing measurements at discrete points. Also, a majority of these sensors require contact with the structure under test which may modify the dynamic response. In contrast, a few recently developed techniques are capable of measuring the response over a wide measurement field without contacting the structure. Two techniques are considered here: continuous-scan laser Doppler vibrometry (CSLDV) and high speed three dimensional digital image correlation (3D-DIC). The large amount of measured velocities and displacements provide an unprecedented measurement resolution; however, they both require post processing to obtain measurements. In this investigation, the frequency response function of a clamped-clamped flat beam will be determined using a modal hammer test, CSLDV, and high speed 3D-DIC. The mode shapes of the beam determined by each of these experimental methods will then be compared to assess the relative merits of each measurement approach.

Original languageEnglish (US)
Title of host publicationExperimental Mechanics of Composite, Hybrid, and Multifunctional Materials - Proceedings of the 2013 Annual Conference on Experimental and Applied Mechanics
EditorsGary Foss, Christopher Niezrecki
PublisherSpringer
Pages321-331
Number of pages11
ISBN (Print)9783319008721, 9783319047287
DOIs
StatePublished - 2014
Externally publishedYes
Event32nd IMAC Conference and Exposition on Structural Dynamics, 2014 - Orlando, United States
Duration: Feb 3 2014Feb 6 2014

Publication series

NameConference Proceedings of the Society for Experimental Mechanics Series
Volume6
ISSN (Print)2191-5644
ISSN (Electronic)2191-5652

Conference

Conference32nd IMAC Conference and Exposition on Structural Dynamics, 2014
Country/TerritoryUnited States
CityOrlando
Period2/3/142/6/14

Keywords

  • Continuous scan laser
  • Digital image correlation

ASJC Scopus subject areas

  • Engineering(all)
  • Computational Mechanics
  • Mechanical Engineering

Fingerprint

Dive into the research topics of 'Mode shape comparison using continuous-scan laser doppler vibrometry and high speed 3D digital image correlation'. Together they form a unique fingerprint.

Cite this