COMPUTER-AIDED MODELLING OF GAS-CUMULATIVE EFFECT
Intensive development of computer technology hardware and software products opens up new opportunities for studying the gas-cumulative effect of a charge. Modern personal computers allow processing the data of any complexity, and intelligent programs allow accurately predicting the penetration of shaped charges. Computer simulation is known to be one of the most progressive methods of modeling phenomena characterized by short flow times, large deformations and displacements, and partial or complete material destruction. Therefore, a promising way to solve such problems is to use the universal computational capabilities of modern ANSYS AUTODYN application software, which has the most extensive modeling capabilities of such systems. The software environment allows you to visualize the experiment at different points in time, which is impossible when conducting a full-scale experiment. ANSYS AUTODYN contains many solvers and computational methods that allow one to effectively solve complex problems of high-speed impact or explosion, where load changes occur in a short period of time. Therefore, the study of the possibility of using computer simulation of the punching action of a cumulative charge based on modern information technologies is an urgent task of scientific interest and practical significance. In this paper, using modern computer technology, we developed and tested a computer simulation technique for the penetration of charges of different heights (20, 30, and 50 mm) in ANSYS AUTODYN. We also clearly demonstrated forecasting the values of penetration depths and diameters of holes of steel barriers is clearly demonstrated. Using ANSYS AUTODYN, we investigated the dependences of penetration depths and hole diameters on charge heights. Dependence of penetration depths on charge heights, obtained based on computer-aided modelling results, is of non-linear nature, where the penetration depths are observed to increase by 33 % within the height range of 20...30 mm, while they do not change within the range of 30…50 mm (i.e., they have a permanent value, plateau stage). Dependence of penetration diameters on charge heights, obtained based on computer-aided modelling results, is of linear nature, where no changes in the values of penetration diameters are observed within the entire range of data. The dependences obtained were analyzed comparatively. Comparative studies were conducted regarding the results obtained in computer-aided modeling and in natural experiments.