REFLECT-4 Code Computations of 40 KT Nuclear Blast Waves Reflected from the Ground for Four Heights-of-Burst. Volume 2. Detailed Data and Plots.
Technical rept. 1 Sep 83-31 Aug 84,
KAMAN AVIDYNE BURLINGTON MA
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The REFLECT-4FAB-2D two-dimensional hydrodynamic computer codes were used to compute the blast flow characteristics for 40-KT nuclear bursts reflected from the surface of the earth in a non-homogeneous atmosphere for four heights of burst. Detailed results are presented for overpressure, dynamic pressure, positive impulses, positive pressure durations and arrival times for 40-KT bursts in a standard non-uniform atmosphere for heights of burst of 1026, 1710 and 2052 feet scaled heights of burst of 300, 500, and 600 ftKT to the 13 power down to ground peak overpressure levels less than 0.4 psi. In addition, results are presented from a very high resolution run for a 40-KT burst at 1368-ft HOB 400-ft SHOB for ground ranges through the transition range. The numerical results are generally in agreement with nuclear test results and indicate a possible need for revisions of present height-of-burst charts. Effects of small heights above the ground on the overpressure and dynamic pressure blast environment are discussed. Volume I of this report summarizes the computed data obtained. Volume II presents detailed tabular data and time histories of overpressure and dynamic pressure at the ground and the associated impulses.