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A theoretical research of the model shot modernization using high-energy paste-like propellants (PP) as a travelling charge (TC) for a 130 mm caliber installation was carried out. To simulate the shot on the 130 caliber installation, the model parameters were calculated based on the analysis of experimental data obtained on a 30-mm model ballistic installation at the Research Institute of Applied Mathematics and Mechanic at Tomsk State University. It was necessary to assess the possibility of shot modernization at the expense of the TC on the installation of 130 mm caliber. Using the ballistic parameters obtained on the model installation, a parametric study was carried out for a single-segment and two-segment PP, in order to determine the most optimal loading parameters that will increase the muzzle velocity of the projectile. The research was conducted in three stages. At the first stage, the possibility of modernization the shot was tested, in which only one type of PP was used as a PP - PP-2. At the second stage, the possibility of using two segmented PP with a constant mass of the PP-1 retarder was investigated, and at the third stage, the retarder mass increased by 66.7%. [ABSTRACT FROM AUTHOR]

In this paper we present calculating and experimental study of high-speed interaction between explosive content, protected by layered-spaced design, and the cermet impactor in wide speed range. An experimental technique and mathematical model of during the behavior of explosives, protected by layer-spaced design, by with high-speed impact. The process of the interaction between the cermet impactor and element of the protective design is customized and depends on the materials of the interacting bodies, the speed and angle of impact. [ABSTRACT FROM AUTHOR]

Special features of material behavior of a supercavitating projectile are investigated at various initial velocities of entering water on the basis of the developed stress-strain state model with possibility of destruction of solids when moving in water and interacting with various underwater barriers with the use of consistent methodological approach of mechanics of continuous media. The calculation-experimental method was used to study the modes of motion of supercavitating projectiles at sub- and supersonic velocities in water medium after acceleration in the barrelled accelerator, as well as their interaction with barriers. Issues of stabilization of the supercavitating projectile on the initial flight path in water were studied. Microphotographs of state of solids made of various materials, before and after interaction with water, at subsonic and supersonic velocities were presented. Supersonic velocity of the supercavitating projectile motion in water of 1590 m/s was recorded. [ABSTRACT FROM AUTHOR]

The given article presents the conducted calculation and experimental study on destruction of heat-resistant coating material of an aircraft in the process of high-speed interaction of the steel spherical projectile. The projectile is imitating a meteoric particle. The study was conducted in the wide range of velocities. The mathematical behavioral model of heat-resistant coating under high-speed impact was developed. The interaction of ameteoric particle with an element of the protective structure has especially individual character and depends on impact velocity and angle, materials of the interacting solids. [ABSTRACT FROM AUTHOR]