Operational dynamic testing in the presence of harmonic excitation

Prasenjit Mohanty, Daniel J. Rixen

Research output: Chapter in Book/Report/Conference proceedingChapterpeer-review

1 Scopus citations

Abstract

A new procedure to identify modal parameters is proposed to take into account harmonic components while applying techniques originally suitable for random inputs only. This operational modal analysis technique is based on the natural excitation approach where the correlation functions of the outputs are considered as impulse responses. Modal parameters are then obtained using identification method like the Least Square Complex Exponential. In the presence of harmonic components, we propose to modify the identification algorithm so that, even when the harmonic part of the response has a frequency close to eigenfrequencies, modal parameters can still be identified accurately.

Original languageEnglish
Title of host publicationComputational Fluid and Solid Mechanics 2003
PublisherElsevier Inc.
Pages477-481
Number of pages5
ISBN (Electronic)9780080529479
ISBN (Print)9780080440460
DOIs
StatePublished - 2 Jun 2003
Externally publishedYes

Keywords

  • Harmonic response
  • Modal testing
  • Operational modes
  • Random vibration
  • System identification

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