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Demarcation for the Coupling Strength in the MODENA Approach

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Rotating Machinery, Hybrid Test Methods, Vibro-Acoustics & Laser Vibrometry, Volume 8

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Abstract

MODal ENergy Analysis (MODENA) is an energy-based approach which is proposed recently to provide a pure tone analysis of power flow. The net exchanged power between two coupled oscillators is proportional to the weighted difference of total energies of oscillators. Contrary to Statistical Energy Analysis (SEA) or Statistical modal Energy distribution Analysis (SmEdA), the MODENA approach can deal with strong coupling case where the power can flow from the oscillator with lower energy to the one with higher energy. The level of coupling strength between oscillators may affect the accuracy of the MODENA approach. This research work aims to propose a criterion to determine the level of coupling in the MODENA approach. A non-dimensional parameter named coupling strength factor is defined to clearly demonstrate the level of coupling strength. Two numerical examples: (a) a two-oscillators coupling case and (b) a multi-modal coupling case are conducted to show the effectiveness of the proposed criterion.

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Acknowledgments

The work described in this paper was supported by a Program for New Century Excellent Talents in University (NCET-11-0086), a Research Grant from National Natural Science Foundation of China (No. 10902024) and also funded by Jiangsu Natural Science Foundation (No. BK2010397).

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Authors and Affiliations

  1. Jiangsu Key Laboratory of Engineering Mechanics, Southeast University, Nanjing, 210096, China

    Peng Zhang, Shaoqing Wu, Yanbin Li & Qingguo Fei

  2. Department of Engineering Mechanics, School of Civil Engineering, Southeast University, Nanjing, 210096, China

    Peng Zhang, Shaoqing Wu, Yanbin Li & Qingguo Fei

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  1. Peng Zhang
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  2. Shaoqing Wu
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  3. Yanbin Li
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  4. Qingguo Fei
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Correspondence to Qingguo Fei .

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Editors and Affiliations

  1. Mechanical Engineering, Michigan Technological University Mechanical Engineering, Houghton, Michigan, USA

    James De Clerck

  2. Sandia National Laboratory , Albuquerque, USA

    David S. Epp

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© 2016 The Society for Experimental Mechanics, Inc.

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Zhang, P., Wu, S., Li, Y., Fei, Q. (2016). Demarcation for the Coupling Strength in the MODENA Approach. In: De Clerck, J., Epp, D. (eds) Rotating Machinery, Hybrid Test Methods, Vibro-Acoustics & Laser Vibrometry, Volume 8. Conference Proceedings of the Society for Experimental Mechanics Series. Springer, Cham. https://doi.org/10.1007/978-3-319-30084-9_18

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  • DOI: https://doi.org/10.1007/978-3-319-30084-9_18

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  • Publisher Name: Springer, Cham

  • Print ISBN: 978-3-319-30083-2

  • Online ISBN: 978-3-319-30084-9

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