Inversion of Rayleigh Wave Group Velocities from High-Explosive Tests.

Abstract

Rayleigh-wave group-velocity have been obtained by the moving window analysis of high-explosive ground motion records at McCormick Ranch, Kirtland AFB. Fundamental mode velocities (225 to 264 m/s) were determined for the period range 50-160 ms at a recording distance of 229 m. Also, higher mode dispersion was observed for periods 25-60 ms with group velocities of 280 305 m/s. Possible spall phase dispersion was observed at distances of 11-36 m. Seismic refraction surveys provided initial model parameter for the test site. An iterative inversion method was used to estimate the shear velocity distribution. Constant layer thickness and attenuation values equal 50-100 were additional initial constraints. Inversion results yielded a shear-wave velocity model of 245-610 m/s to a depth of 24 m at McCormick Ranch. Originator-supplied keywords include: Rayleigh wave, group velocity, and high explosive tests.

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Document Details

Document Type
Technical Report
Publication Date
Jan 01, 1985
Accession Number
ADA152172

Entities

People

  • G. W. Simila

Organizations

  • California State University, Northridge

Tags

Communities of Interest

  • Weapons Technologies

DTIC Thesaurus Topics

  • Air Force
  • California
  • Computer Programming
  • Computer Programs
  • Explosions
  • Explosive Testing
  • Explosives
  • Frequency
  • Group Velocity
  • High Explosives
  • New Mexico
  • Phase Velocity
  • Rayleigh Waves
  • Secondary Waves
  • Surface Waves
  • Wave Propagation
  • Waveforms

Readers

  • Environmental Remediation and Restoration.
  • Seismology