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Prediction of the transient energy response for complex vibro-acoustic systems

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Abstract

As research works of the transient statistical energy analysis (TSEA) and transient local energy approach (TLEA) mostly focus on simple structures, TSEA and TLEA are adopted to quantify the transient response of a complex vibro-acoustic system at the mid-high frequency range in this paper. Numerical examples of a coupled oscillator system, an L-shaped plate, and a launch vehicle fairing model are conducted to demonstrate the effectiveness and accuracy of TSEA and TLEA. The computational precision of TSEA and TLEA is verified by the analytical solution and finite element method. Furtherly, the transient energy responses of subsystems with different coupling ratios between subsystems are investigated. Results show that TLEA has a better performance than TSEA. With the increasing coupling ratio between subsystems, the rise time and peak energy of transient energy response of subsystems decrease gradually. Both ratios of rise time and peak energy predicted by TLEA to these of the TSEA increase as the rising of the coupling ratio.

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Authors and Affiliations

  1. Institute of Aerospace Machinery and Dynamics, Southeast University, Nanjing, 211189, China

    Qiang Chen, Qingguo Fei, Yanbin Li, Shaoqing Wu & Xuan Yang

  2. Department of Engineering Mechanics, Southeast University, Nanjing, 211189, China

    Qiang Chen & Shaoqing Wu

  3. School of Mechanical Engineering, Southeast University, Nanjing, 211189, China

    Yanbin Li & Xuan Yang

Authors
  1. Qiang Chen
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  2. Qingguo Fei
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  3. Yanbin Li
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  4. Shaoqing Wu
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  5. Xuan Yang
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Corresponding author

Correspondence to Qingguo Fei.

Additional information

Recommended by Associate Editor Jin Woo Lee

Qiang Chen is a Ph.D. candidate in Engineering Mechanics of Southeast University. His research is focused on prediction of high-frequency dynamic response of vibro-acoustics systems.

Qingguo Fei, Ph.D., Professor, graduated from Nanjing University of Aeronautics and Astronautics. His research interests include structural dynamics, inverse problems as system identification, structural vibration acoustics/vibroacoustics, dynamical strength assessment and composite material.

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Chen, Q., Fei, Q., Li, Y. et al. Prediction of the transient energy response for complex vibro-acoustic systems. J Mech Sci Technol 33, 495–504 (2019). https://doi.org/10.1007/s12206-019-0102-y

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  • DOI: https://doi.org/10.1007/s12206-019-0102-y

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