Numerical simulation of surface explosions over dry, cohesionless soil

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• 作者：Anirban De ^{anirban.de@manhattan.edu}
• 关键词：Numerical modeling ; Centrifuge modeling ; Explosion ; Blast loading ; Underground tunnel
• 刊名：Computers and Geotechnics
• 出版年：2012
• 期刊代码：38_0266352x
• 类别：et
• 出版时间：June, 2012
• 卷：43
• 期：Complete
• 页码：72-79
• 文件大小：2672 K

摘要

Numerical modeling of the effects of explosions relies on suitable material models appropriate for large deformation problems. Available results of a wide range of static and dynamic tests on Nevada #120 sand, completed as part of an earlier project (VELACS), were utilized to calibrate a numerical model for sand, suitable for modeling surface explosions. A fully-coupled Euler-Lagrange Interaction was utilized to correctly model pressures created by the explosion simultaneously with the large deformations in the soil. The model was used to study two cases - the first with a 2-D axisymmetric case of crater formation; and the second with a 3-D case of surface explosion above an underground tunnel. The results of numerical analyses were found to closely match those from other analyses, field tests, and centrifuge model tests.