PULSE SHAPES OF CREEPING WAVES AROUND SOFT CYLINDERS,

Abstract

The process of diffraction of sound waves by finite obstacles is now commonly analyzed in terms of creeping waves that encircle the scattering object azimuthally. For the example of a soft infinite circular cylinder, we have studied the scattering of pulsed sound waves, both of delta-function and of finite step function shape (with or without harmonic modulation). We investigated the changes in pulse shape which occur as the pulse propagates over the cylinder surface. This constitutes an extension of previous work by Friedlander and by the present authors in which only the initial rise of the creeping pulses was obtained numerically, and it has been accomplished by an asymptotic expansion in the Laplace-transform variable s. (Author)

Document Details

Document Type
Technical Report
Publication Date
Feb 01, 1968
Accession Number
AD0675055

Entities

People

  • H. Uberall
  • J. V. Mcnicholas
  • K. Choate

Organizations

  • The Catholic University of America

Tags

DTIC Thesaurus Topics

  • Acoustic Propagation
  • Acoustic Waves
  • Asymptotic Series
  • Delta Functions
  • Diffraction
  • Mathematical Analysis
  • Mathematics
  • Modulation
  • Scattering
  • Shape
  • Sound Waves
  • Step Functions
  • Waves

Readers

  • Electromagnetic Wave Scattering and Antenna Radiation Engineering
  • Structural Dynamics.