Influence of the acoustic-structural couplings upon free vibrations of mechanical systems

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Authors

  • J. HORÁČEK Institute of Thermomechanics, Poland
  • I. ZOLOTAREV Institute of Thermomechanics, Poland

Abstract

The roles of acoustic-structural couplings in three entirely different aeroelastic systems are compared. The first system is a thin elastic cylindrical shell containing fluid in a coaxial annular duct, the second system is a thin plate vibrating in fluid near a rigid wall, and the third system is a simple single degree-of-freedom mechanical system, vibrating in contact with a confined volume of an acoustic medium. It is shown that the nature of the acoustic-structural coupling is identical in all the studied cases.

References

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[2] J. HORACEK, I. ZOLOTAREY, Natural vibration and stability of cylindrical shells conveying fluid, In AN. Guz ed.: Dynamics of bodies in iteraction with surroundings (in Russian) Naukova dumka, Kiev 1991.

[3] J. HORACEK, I. ZOLOTAREV, Acoustic-structural coupling of vibrating cylindrical shells with flowing fluid, Journal of Fluids and Structures, 5, 5, 487—501 (1991).

[4] J. HORACEK, I. ZOLOTAREV, Frequency-model characteristics of cylindrical shell with annular flow of a light fluid, In Proceedings of Eight World Congress IFToMM Prague, Aug. 26—31, 1991, vol. 5, p. 1503—1506.