• Title, Summary, Keyword: 직육면체 폐공간

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A Free Vibration Analysis of Sound-Structure Interaction Plate (구조-음향 연성평판의 자유진동해석)

  • Lee, Dong-Ick;O, Jae-Eung
    • Transactions of the Korean Society of Mechanical Engineers A
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    • v.20 no.8
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    • pp.2546-2554
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    • 1996
  • In order to investigate the characteristics of sound-structure interaction problems, we modeled a rectangular cavity and the flexible wall of the cavity. Because the governing equations of motion are coupled through velocity terms, we could redefine them using the velocity potential. We calculated the natural frequencies of plate using orthogonal polynomial functions which satisfy the boundary conditions in the Rayleigh-Ritz Method. As the result, comparisons of theory and experiment show good agreement. and using orthogonal polynomial functions which satisfy the boundary conditions in the Rayleigh-Ritz method show useful method for sound-structure interaction problems too.

A free vibration analysis of sound-structure interaction plate having a small cut-out (부분적으로 열린 구조-음향 연성평판의 자유진동해석)

  • Oh, Jae-Eung;Rhee, Dong-Ick
    • Transactions of the Korean Society of Mechanical Engineers A
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    • v.21 no.10
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    • pp.1666-1673
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    • 1997
  • In order to investigate the characteristics of sound-structure interaction plate having a cut-out, we modeled a rectangular cavity and the flexible plate of the cavity. Because the particle velocity of air is the same as that of plate on the plate, we could easily redefine vibration equation using the velocity potential. We calculated the natural frequencies of plate using orthogonal polynomial functions which satisfy the boundary conditions in the Rayleigh-Ritz method. For the change of vibration characteristics, the effect of sound-structure interaction is more dominant than that of cut-out size.