Accession Number : AD0624715

Title :   DECOUPLING ESTIMATES FOR UNDERGROUND EXPLOSIONS.

Descriptive Note : Research paper,

Corporate Author : INSTITUTE FOR DEFENSE ANALYSES ARLINGTON VA RESEARCH AND ENGINEERING SUPPORT DIV

Personal Author(s) : Tucker,B. L.

Report Date : OCT 1965

Pagination or Media Count : 22

Abstract : There is a considerable body of data, including all the direct P-Wave data from Project Cowboy, which indicates a decoupling factor of the order of two for a salt cavity compared to tamped alluvium or valley tuff. Cavities in soft rock probably do not decouple at all but increase the seismic signal. An increase in decoupling due to high frequency absorption appears unlikely, but should such an effect exist, decoupling factors would probably still be less than ten. Cavity decoupling may actually increase detectability because of the lower background noise at the higher frequencies produced by the cavity. (Author)

Descriptors :   (*UNDERGROUND EXPLOSIONS, DAMPING), STATISTICAL ANALYSIS, SOIL MECHANICS, ROCK, NOISE

Subject Categories : Explosions

Distribution Statement : APPROVED FOR PUBLIC RELEASE