Accession Number : AD0487427

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

Corporate Author : MICHIGAN UNIV ANN ARBOR INST OF SCIENCE AND TECHNOLOGY

Personal Author(s) : Pollack, Henry N.

Report Date : AUG 1966

Pagination or Media Count : 10

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)

Descriptors :   (*SEISMIC WAVES, PATTERN RECOGNITION), DETONATION WAVES, STRESSES, MATHEMATICAL MODELS, DIFFERENTIAL EQUATIONS, EXPLOSIONS, MATHEMATICAL ANALYSIS.

Subject Categories : Seismology

Distribution Statement : APPROVED FOR PUBLIC RELEASE