Abstract: A theoretical model is developed to predict the sound radiation ability of a cylindrical thin elastic shell of finite length,
covered with a damp layer and terminated with infinite
cylindrical rigid baffles. This shell is immersed in a heavy
fluid extending up to infinity, and excited by a constant point
load continuously traveling along the circumferential direction.
A frequency-domain representation of the rotating load and three
equations of the vibroacoustic coupling problem are given. The
equations are solved by means of modal analysis method and
asymptotic expansion method. Also, a mathematical expression of
modal amplitude of shell radial displacement is obtained. The
sound radiation ability of this kind of shell is evaluated and
the corresponding numerical results are given.
Key words: Rotating
load Heavy fluid Cylindrical shell Sound radiation
*
This project
is supported by Doctorate Foundation of Xi'an Jiaotong University. Manuscript received on
December 24, 1997; revised manuscript March 8, 1997
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