Geotechnical soil parameters and soil moisture content in particular, were found tohave a significant effect on the total impulse inflicted on a structure by a buriedexplosive charge [1, 2, 3]. Previous research conducted by Plasan [6] quantified theblast intensity of a buried explosive charge in graded gravel by two measuringroutines: steel plate deformation and flying plate. In the study, which was presentedin previous IBS conference [7] an additional soil types and soil parameters whereexamined while utilizing improved measuring apparatus.The experimental study was conducted on three different soils: sand, clayey sandand graded gravel with silt. The blast intensity was measured by mine impulsependulum (MIP).Results obtained indicate that saturation ratio is the most dominant factorinfluencing buried- charge blast impulse magnitude.Sequential to experiments, a numerical investigation was performed in order tocharacterize the blast and to relate its characteristics to soil type and properties.Finite element (FE) explicit simulation was conducted using Ls-Dyna. In thenumeric model, impulse load was inflicted to the MIP by implementing bothsoftware embedded blast subroutines, i.e. *LOAD_BLAST_ENHANCED and*INITIAL_IMPULSE_MINE, by Arbitrary Lagrangian Eulerian (ALE)formulation and DES with Particle Blast method. In order to accurately simulateburied charge impulse load, it is required to use either ALE formulation ParticleBlast or to scale reflected pressure pulse duration. The correlation of the differentblast modeling methods to the test results for the different soil types and saturationdegree will be presented and discussed.
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