Механика

The results of experimental and theoretical investigation of high-velocity penetration of compact and elongatedprojectiles on concrete and reinforced concrete plates in velocity range up to 1 km/s are presented. Thealgorithm of calculate of penetration depth in concrete for 10 kg high durable steel projectiles, based on experimentallydetermined ejecting work until of concrete, is offered.

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Stability of two-step finite-difference schemes is performed. The time derivative is approximated by thecentral difference. The stability analysis with respect to initial conditions is performed. The Neumann method isused. The special approximations for the convective terms in the kinetic equations are considered. It is shownthat schemes are conditionally stable and have a non-empty stability domain.

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