COLLECTION AND ANALYSIS OF SEISMIC WAVE PROPAGATION DATA. SUPPLEMENT 4: TWO-DIMENSIONAL WAVES IN AN INFINITE MEDIUM BOUNDED INTERNALLY BY A HARMONICALLY PRESSURIZED ELLIPSE,

Abstract

This paper studies the role of the cavity shape in determining the two-dimensional far-field radiation from a pressurized source. The radiation patterns are obtained for both the longitudinal and transverse waves radiating from an elliptical region that varies from a line source to a circular source. The results of several cases show that: (1) for all noncicular boundzries the shear wave exists and consistently shows a four-lobed pattern of alternate polarity. (2) the ratio of wavelength to cavity ecicumference and the cavity shape (ellipticity) have a strong influence on the radiation patter. (Author)

Document Details

Document Type
Technical Report
Publication Date
Aug 01, 1966
Accession Number
AD0487427

Entities

People

  • Henry N. Pollack

Organizations

  • University of Michigan

Tags

DTIC Thesaurus Topics

  • Far Field
  • Polarity
  • Radiation
  • Radiation Patterns
  • Secondary Waves
  • Seismic Waves
  • Shape
  • Transverse
  • Transverse Waves
  • Two Dimensional
  • Wave Propagation
  • Waves

Fields of Study

  • Physics

Readers

  • Atmospheric Science / Meteorology, specifically Wind Wave Turbulence.
  • Electromagnetic Wave Scattering and Antenna Radiation Engineering
  • Structural Dynamics.