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Physical Only Modes Identification Using the Stochastic Modal Appropriation Algorithm

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Design and Modeling of Mechanical Systems - IV (CMSM 2019)

Part of the book series: Lecture Notes in Mechanical Engineering ((LNME))

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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.

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References

  1. Abdelghani M, Inman DJ (2015) Modal appropriation for use with In-Operation modal analysis. J Shock Vib

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  2. Abdelghani M, Friswell MI (2018) Stochastic modal appropriation (SMA). In: IMAC’2018, USA

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  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, Orlando

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Author information

Authors and Affiliations

  1. University of Sousse, Sousse, Tunisia

    Maher Abdelghani

  2. LASMAP, EPT, La Marsa, Tunisia

    Maher Abdelghani

Authors
  1. Maher Abdelghani
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Corresponding author

Correspondence to Maher Abdelghani .

Editor information

Editors and Affiliations

  1. Preparatory Institute of Engineering Studies of Monastir (IPEIM), Monastir, Tunisia

    Nizar Aifaoui

  2. National Engineering School of Monastir (ENIM), Monastir, Tunisia

    Zouhaier Affi

  3. National School of Engineers of Sfax (ENIS), Sfax, Tunisia

    Mohamed Slim Abbes

  4. National School of Engineers of Sfax (ENIS), Sfax, Tunisia

    Lassad Walha

  5. National School of Engineers of Sfax (ENIS), Sfax, Tunisia

    Mohamed Haddar

  6. National Engineering School of Sousse (ENISO), Sousse, Tunisia

    Lotfi Romdhane

  7. National Engineering School of Monastir (ENIM), Monastir, Tunisia

    Abdelmajid Benamara

  8. National Engineering School of Monastir (ENIM), Monastir, Tunisia

    Mnaouar Chouchane

  9. Department of Mechanical Engineering, National School of Engineers of Sfax (ENIS), Sfax, Tunisia

    Fakher Chaari

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Abdelghani, M. (2020). Physical Only Modes Identification Using the Stochastic Modal Appropriation Algorithm. In: Aifaoui, N., et al. Design and Modeling of Mechanical Systems - IV. CMSM 2019. Lecture Notes in Mechanical Engineering. Springer, Cham. https://doi.org/10.1007/978-3-030-27146-6_30

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  • DOI: https://doi.org/10.1007/978-3-030-27146-6_30

  • Published:

  • Publisher Name: Springer, Cham

  • Print ISBN: 978-3-030-27145-9

  • Online ISBN: 978-3-030-27146-6

  • eBook Packages: EngineeringEngineering (R0)

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