DNA/WES Ground Motion Test Facility-Results and Analysis of Impact Tests AgainstMasonry and Socorro Plaster Sand Testbeds

摘要

The DNA/WES Ground Motion Test Facility is a vertical gas gun with a 4-ftdiameter projectile. This report describes use of this facility for conducting tests with sand testbeds. A description of testbed construction and testing procedures is discussed. Stress and velocity histories are presented from each test. Analysis of the data includes determination of the propagation velocity of the loading and rarefaction waves in a test article. A method for analyzing impacts for planarity and angle of impact is presented. This test facility is a viable tool for instrumentation development studies. Investigations using the limited database available indicate that the gun provides a unique capability for determination of dynamic material properties for large geologic samples. These tests provided valuable information on the performance of weapons effects instruments prior to their use in large field tests. Analytic tools developed for analyzing test data will impact future tests by providing tolerances for various aspects of testing and by optimizing instrument arrays for cross correlation of stress and velocity data. Gas Gun, Instrument calibration, Ground motion, Projectile impact, Ground shock, Planarity.