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|Title:||Influence of burst position on airblast, ground shock, and cratering in sandstone|
|Authors:||United States. Army. Office of the Chief of Engineers.|
Ingram, James K.
Drake, James L.
Ingram, Leo F.
|Publisher:||Weapons Effects Laboratory (U.S.)|
Engineer Research and Development Center (U.S.)
|Series/Report no.:||Miscellaneous paper (U.S. Army Engineer Waterways Experiment Station) ; N-75-3.|
Abstract: Seven 1000-lb nitromethane spheres were detonated at different height/depths of burst with respect to the surface of a sandstone rock mass near Grand Junction, Colorado. The purpose of the tests was to study the effects of burst position on airblast, ground shock (the primary interest), and cratering phenomena. Ground motions were measured directly beneath the charges to maximum depths of 60 ft and at several locations near the ground surface within horizontal distances of 100 ft. Airblast pressure-time histories were determined along the rock surface at five stations extending to the 10-psi level. "Postshot surveys were made to determine apparent and true crater dimensions. Test results showed crater dimensions, horizontal motions near the surface, and peak airblast pressure were strongly dependent on burst position." The most influential charge elevations ranged from two charge radii above the surface to two charge radii below the surface. Airblast, crater, and ground motion parameters were normalized and plotted as functions of normalized charge elevation to provide a direct and simple assessment of charge position effects.
|Rights:||Approved for public release; distribution is unlimited.|
|Appears in Collections:||Miscellaneous Paper|
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