摘要：Extensive research activities in the field of blast loads have taken place
in the last few decades. There are many experimental results related to
underground explosions. The mechanism of crater formation is complex and it
is related to the dynamic physical properties of air, soil and
soil-air interface. Studies concerned with the characteristics of craters
caused by explosions usually resort to dimensional analysis and statistics.
Some empirical equations proposed for the evaluation of crater dimensions can
be found in the literature. Nevertheless, they were obtained for particular type
of soils, shapes of explosives, ranges of explosive mass and depth of
explosive and they present considerable variability. The main objective of
this paper is to prove the accuracy of numerical simulation of craters
produced by underground explosions. For this purpose, the numerical analysis
of crater formation due to underground explosions is performed with a
hydrocode. Several numerical approaches are carried out using different
models and processors for the soil. Moreover, different alternatives for the
constitutive model of the soil are used. In order to validate the
numerical approach and prove its ability to model the crater
formation, comparison with experimental results is performed. Many
simulations of the same physical model lead to the same crater dimensions and
a good agreement between the test results and the predicted crater measures
is achieved.
