Modelling of High-Frequency Scattering from Elastic Spheres

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Authors
  1. Fawcett, J.A.
Corporate Authors
Defence Research Establishment Atlantic, Dartmouth NS (CAN)
Abstract
Elastic objects, either solid or shelled, may have a complicated temporal response, consisting, possibly of a specular reflection followed by energy which travels circumferentially about the object. As well, energy may propagate and reflect internally within a solid object or fluid-filled shell. Thus, the highlight region of a sonar return may have structure and be extended in time due to the non-specular arrivals. The elastic responses of spheres, steel-shelled with air or water fill or solid spheres (rocks), are modelled for the high frequencies typical of minehunting sonars and the resulting features in the time domain are examined. The effect of attenuation in the materials is also examined.
Keywords
Elastic scattering
Report Number
DREA-TM-98-233 — Technical Memorandum
Date of publication
01 Feb 1999
Number of Pages
29
DSTKIM No
99-01498
CANDIS No
511052
Format(s):
Hardcopy

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