University of Hertfordshire

And yet another method for the identification of modal constants in Experimental Modal Analysis

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

  • D. Montalvão
  • D. M. Amafabia
  • J. M. M. Silva
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Original languageEnglish
Title of host publicationIOMAC 2017 - 7th International Operational Modal Analysis Conference
PublisherInternational Operational Modal Analysis Conference (IOMAC)
Number of pages4
Publication statusPublished - May 2017
Event7th International Operational Modal Analysis Conference, IOMAC 2017 - Ingolstadt, Germany
Duration: 10 May 201712 May 2017


Conference7th International Operational Modal Analysis Conference, IOMAC 2017


Modal Identification from Frequency Response Functions (FRFs) is a chapter of Experimental Modal Analysis (EMA) that many would consider as something from the past. Yet, in a previous work [2], a new approach to determine the modal damping factors from FRFs was proposed. Contrary to other modal identification methods which are based on the dynamic motion governing equations, the method used the dissipated energy per cycle of vibration as a starting point. The method used a plot of the sine of the phase of the receptance against its amplitude. In this paper, it will be shown that near resonant frequencies, its shape is elliptical, whereby the modal constants can be determined.

ID: 12315868