Accession Number:

ADA270102

Title:

Wave Propagation Near Explosive Sources

Descriptive Note:

Technical rept.

Corporate Author:

CALIFORNIA UNIV BERKELEY SEISMOGRAPHIC STATION

Personal Author(s):

Report Date:

1993-05-20

Pagination or Media Count:

32.0

Abstract:

A basic goal of seismic yield estimation is to understand the relationship between the yield of an explosion and the amplitude of seismic waves radiated into the far field. Of particular interest in this relationship is the role played by material properties in the vicinity of the source. This study is all attempt to investigate this problem through the use of an equivalent elastic treatment for the region between the original cavity radius and the elastic radius. Equations are developed which allow the material properties to be modified as a function of the level of stress, and a propagator method is presented which solves the elastodynamic equations for a visco-elastic material with properties that vary as a function of radial distance from the explosive source. The relations between parameters measures in laboratory tests and the material properties required in wave propagation problems are also reviewed. While this approach is only an approximation to calculations with hydrodynamic and equation-of-state codes, it has the advantage of providing simple analytic results in which the role of various model parameters is easily investigated.... Wave propagation, Explosive sources, Nonlinear elastic

Subject Categories:

  • Seismology
  • Explosions

Distribution Statement:

APPROVED FOR PUBLIC RELEASE