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Related Experiment Videos

Circumferential waves on an immersed, fluid-filled elastic cylindrical shell.

X L Bao1, P K Raju, H Uberall

  • 1Department of Mechanical Engineering, Auburn University, Alabama 36849-5341, USA.

The Journal of the Acoustical Society of America
|May 21, 1999
PubMed
Summary

This study explores circumferential waves in elastic shells surrounded by fluids. Shell-fluid coupling causes significant repulsion in wave dispersion curves, impacting acoustic scattering.

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Area of Science:

  • Acoustic scattering
  • Elasticity
  • Fluid dynamics

Background:

  • Circumferential waves propagate along the surface of cylindrical structures.
  • Shell-fluid interactions influence wave behavior and acoustic properties.
  • Dispersion curves illustrate wave speed changes with frequency.

Purpose of the Study:

  • To investigate the existence and behavior of circumferential waves in a fluid-filled elastic cylindrical shell.
  • To analyze the phenomenon of dispersion curve repulsion in this system.
  • To understand the role of shell-fluid coupling in acoustic scattering.

Main Methods:

  • Analytic calculation of partial-wave resonances.
  • Analysis of acoustic scattering amplitude for a normally incident plane wave.

Related Experiment Videos

  • Examination of phase-velocity dispersion curves for circumferential waves.

    • Main Results:

    • Identified various types of circumferential waves, categorized as shell-borne or fluid-borne.
    • Observed and documented a significant number of dispersion curve repulsion cases.
    • Demonstrated the direct impact of shell-fluid coupling on wave dispersion.

    Conclusions:

    • Shell-fluid coupling is a critical factor governing the behavior of circumferential waves.
    • Repulsion in dispersion curves is a key characteristic of this wave system.
    • The findings contribute to understanding acoustic wave propagation and scattering in complex fluid-structure systems.