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Special Topics in Structural Dynamics, Volume 6 pp 67–77Cite as

Modal Parameters of Multiple-Disk Shaft System from Multiple Reference Impact Test

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Abstract

The proposed work is intended for Experimental Modal Analysis (EMA) of a multi-disk shaft system to estimate its modal parameters, i.e., natural frequencies, damping ratios, and mode shapes. The considered system is excited by a roving impact hammer at a set of excitation points, and the vibration response is measured at a number of response points (taken as reference points) using piezoelectric accelerometers. The Frequency Response Function (FRF) matrix and the corresponding Impulse Response Function (IRF) matrix are estimated, which allows the detection and estimation of repeated or closely coupled modes, known to exist in the considered structure. The estimated FRF and IRF matrices are employed with both time and frequency domain algorithms to estimate the desired modal parameters. Modal frequencies are estimated from Finite Element analysis using ANSYS and compared with the experimentally obtained frequencies.

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Acknowledgement

The authors acknowledge support provided the Deanship of Research at Jordan University of Science & Technology (JUST) under grant 2013/198, as well as the valuable discussion with Dr. M. El-Kafafy from Vrije Universiteit Brussel, Belgium

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Authors and Affiliations

  1. Department of Mechanical Engineering, Jordan University of Science & Technology, (JUST), 3030, Irbid, 22110, Jordan

    Naim Khader

  2. Department of Aeronautical Engineering, Jordan University of Science & Technology, (JUST), 3030, Irbid, 22110, Jordan

    Mohammad Ramadan

Authors
  1. Naim Khader
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  2. Mohammad Ramadan
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Corresponding author

Correspondence to Naim Khader .

Editor information

Editors and Affiliations

  1. University of Bristol, Bristol, United Kingdom

    Dario Di Miao

  2. Virginia Polytechnical Institute, Blacksburg, USA

    Pablo Tarazaga

  3. DIISM, Università Politecnica delle Marche, Ancona, Italy

    Paolo Castellini

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© 2016 The Society for Experimental Mechanics, Inc.

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Khader, N., Ramadan, M. (2016). Modal Parameters of Multiple-Disk Shaft System from Multiple Reference Impact Test. In: Di Miao, D., Tarazaga, P., Castellini, P. (eds) Special Topics in Structural Dynamics, Volume 6. Conference Proceedings of the Society for Experimental Mechanics Series. Springer, Cham. https://doi.org/10.1007/978-3-319-29910-5_7

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  • DOI: https://doi.org/10.1007/978-3-319-29910-5_7

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  • Publisher Name: Springer, Cham

  • Print ISBN: 978-3-319-29909-9

  • Online ISBN: 978-3-319-29910-5

  • eBook Packages: EngineeringEngineering (R0)

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