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Volume 39 Issue 4
Apr.  2013
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Journal of Beijing University of Aeronautics and Astronautics  > 2013  >  39(4): 540-543.
Jin Zhongkun, Wang Tongqing, Yang Mingsui, et al. Experimental validation of non-local property of impedance of viscoelastic material[J]. Journal of Beijing University of Aeronautics and Astronautics, 2013, 39(4): 540-543. (in Chinese)
Citation: Jin Zhongkun, Wang Tongqing, Yang Mingsui, et al. Experimental validation of non-local property of impedance of viscoelastic material[J]. Journal of Beijing University of Aeronautics and Astronautics, 2013, 39(4): 540-543. (in Chinese)
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Experimental validation of non-local property of impedance of viscoelastic material

  • 1.

    Fluid and Acoustic Engineering Lab, Beijing University of Aeronautics and Astronautics, Beijing 100191, China

  • 2. AVIC Shenyang Aeroengine Research Institute, Shenyang 110015, China

  • 3. CSIC 760 Research Institute, Dalian 116013, China

  • Received Date: 29 Jun 2012
  • Publish Date: 30 Apr 2013
    Abstract
  • Based on the definition of transmission impedance the local and non-local properties of viscoelastic material and the relationships between the impedance matrix and the frequency response matrix were described. The expression of frequency response function was derived by discretizing the acoustic pressure to equivalent node force on the surface. Based on the formula of the response function the transmission frequency response experiment was carried out when a node force acted on a viscoelastic plate. The frequency response function of the viscoelastic plate was also got by numerical method on the basis of viscoelastic dynamic finite element. The non-local properties and the experimental and numerical approaches were validated by the comparison of the two results, and these approaches can be used for other researches.

     

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