摘要:Shallow buried explosives pose a significant threat to lightweight vehicles and
their occupants. Short term loading imparted by the explosion is enormously
complex and can be significantly affected by a number of parameters including
the size, shape, type, detonation point and depth of burial of the explosive
and the type of soil. Extensive research activities in the field of
buried blast loads have taken place in the last few decades. Nevertheless,
the knowledge about the effect on objects placed over the ground is still
limited. Most results are restricted to experimental observations or what
have occurred during actual blast events. Recent advances in numerical
simulation have enabled the blast of buried explosives to be simulated. The
accuracy of numerical simulation of craters produced by underground explosions
was proved in a previous paper. The numerical analysis of crater formation
due to underground explosions was performed with a hydrocode. Further
validation of the modeling technique is considered in the current paper.
First, the crater produced by spherical explosives loads varying from 10 to 100
kg of TNT, placed at different depths, are simulated and compared with
experimental results. Then the effect on objects located at the ground level
and over the ground is analyzed. The paper is completed with comparison with
experimental results and numerical results obtained by other researchers.