SPHERICAL WAVES IN VISCOELASTIC MEDIA

Closed form solutions to the propagation of spherical waves from an internal steady oscillating pressure source and the transient response of the viscoelastic medium to a pressure impulse are presented. The displacement functions and the stress functions are expressed in terms of the input source and the basic mechanical constants of the medium. In the investigation of impulse-caused propagation phenomenon it is assumed that the loss factors are independent of frequency. Numerical examples for the displacement and stress functions illustrate the damping effect of a viscoelastic medium by comparison with its special case-the elastic medium. The amplitude of the viscoelastic waves from a spherical source decays exponentially; this factor causes the amplitude to depart from that of an elastic wave when the vibration frequency is high and when the distance from the source is large.

Media Info

  • Features: Figures; References;
  • Pagination: 14 p.

Subject/Index Terms

Filing Info

  • Accession Number: 00264443
  • Record Type: Publication
  • Report/Paper Numbers: Research Rpt 158
  • Files: TRIS
  • Created Date: Jan 9 1975 12:00AM