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Physical Only Modes Identification Using the Stochastic Modal Appropriation Algorithm

  • Maher AbdelghaniEmail author
Conference paper
  • 63 Downloads
Part of the Lecture Notes in Mechanical Engineering book series (LNME)

Abstract

Recently the author proposed a new In-Operation modal identification algorithm, namely the Stochastic Modal Appropriation algorithm (SMA) which identifies the frequency and the damping ratio simultaneously in a single step. The key idea is to rotate parametrically the outputs correlation sequence so as it looks like the system impulse response. We show in this work that SMA rejects automatically harmonics as well as spurious/numerical modes leading therefore to physical-only modes identification. After a mathematical proof, the method is validated on a simulated system.

Keywords

In-operation modal analysis Modal appropriation Spurious modes SMA 

References

  1. 1.
    Abdelghani M, Inman DJ (2015) Modal appropriation for use with In-Operation modal analysis. J Shock VibGoogle Scholar
  2. 2.
    Abdelghani M, Friswell MI (2018) Stochastic modal appropriation (SMA). In: IMAC’2018, USAGoogle Scholar
  3. 3.
    Balmès E, Chapelier C, Lubrina P, Fargette P (1996) An evaluation of modal testing results based on the force appropriation method. In: International modal analysis conference, OrlandoGoogle Scholar
  4. 4.
    Meirovitch L (1986) Elements of vibration analysis. McGraw-HillGoogle Scholar

Copyright information

© Springer Nature Switzerland AG 2020

Authors and Affiliations

  1. 1.University of SousseSousseTunisia
  2. 2.LASMAP, EPTLa MarsaTunisia

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