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Volume 31 Issue 4
Jul.  2022
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ZOU Yuanjie, ZHAO Deyou. A study on vibro-acoustical characteristics of damped composite shells in water[J]. ACTA ACUSTICA, 2006, 31(4): 342-349. DOI: 10.15949/j.cnki.0371-0025.2006.04.009
Citation: ZOU Yuanjie, ZHAO Deyou. A study on vibro-acoustical characteristics of damped composite shells in water[J]. ACTA ACUSTICA, 2006, 31(4): 342-349. DOI: 10.15949/j.cnki.0371-0025.2006.04.009
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A study on vibro-acoustical characteristics of damped composite shells in water

  • Dept of Naval Architecture, Dalian University of Technology Dalian 116024

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  • Received Date: December 30, 2004
  • Revised Date: July 04, 2005
  • Available Online: July 20, 2022
    Graphical Abstract
    • Abstract
  • Based on the structural FEM and the acoustic BEM, a numerical model of coupled elastic layer and vis-coelastic layer and outside sound field is established and the vibro-acoustical characteristics of damped composite shells are studied systematically. It can be concluded that the structural vibration responses and the sound radiation are reduced significantly due to the viscoelastic layer and its effects are dependent on the geometric, physical parameters of the layer and the exciting force frequencies. It is also shown that, compared with the bare elastic shells, the influence of the fluid compressibility on the vibration responses of shells covered with a damping layer is not evident and the effects of the free surface and the rigid plane are weakened.
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