Extraction of normal modes from experimental data

Charles Hsu, Ming-Shaung Ju, Y. G. Tsuei

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

2 Citations (Scopus)


A technique is presented to extract normal modes from complex modes. The frequency response function relation of the complex and the normal modes are derived, then an algorithm is developed to calculated the normal modes from the complex modes. A numerical example and an experiment are used to illustrate the applicability of the technique. The results indicate that the technique can extract normal modes well only need fewer FRF vectors for structures with lightly viscous damping and structural damping. For heavily damping, the accuracy of extraction depends on how many FRF vectors are included in the calculation.

Original languageEnglish
Title of host publicationProceedings of SPIE - The International Society for Optical Engineering
Editors Anon
PublisherPubl by Society of Photo-Optical Instrumentation Engineers
Number of pages6
Editionpt 2
ISBN (Print)0912053410
Publication statusPublished - 1993
EventProceedings of the 11th International Modal Analysis Conference - Kissimmee, FL, USA
Duration: 1993 Feb 11993 Feb 4


OtherProceedings of the 11th International Modal Analysis Conference
CityKissimmee, FL, USA

All Science Journal Classification (ASJC) codes

  • Electrical and Electronic Engineering
  • Condensed Matter Physics


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