摘要: The DNA/WES Ground Motion Test Facility is a vertical gas gun with a 1.22-mdiameter projectile. This report describes the selection of a material for use as a standardized granular target. A description of target construction and ... 展开 The DNA/WES Ground Motion Test Facility is a vertical gas gun with a 1.22-mdiameter projectile. This report describes the selection of a material for use as a standardized granular target. A description of target construction and testing procedures is presented. Stress and velocity time-histories from three identical tests (i.e., identical targets and projectile velocities) are presented. Analyses of the data includes determination of the propagation velocity of the loading and relief waves in a test article. The results from identical tests indicate that repeatable ground shock environments were generated on each test. The material used as the target medium, the procedures employed in target construction, and the ability of the gun to deliver the projectile at the same velocity combine to produce known and repeatable stress and motion fields in a target. The predictability and repeatability with which these environments can be generated make the facility a unique tool for conducting instrumentation studies. (MM). 收起