ASSESSMENT OF THE SENSITIVITY OF RADIAL-AXIAL HIGH-EXPLOSIVE FRAGMENTATION PROJECTILE TO LOADS DURING FIRING
DOI:
https://doi.org/10.17721/2519-481X/2025/87-07Keywords:
radial-axial projectile, sensitivity to loads, non-linearity of the barrel bore, natural frequencies of oscillations, dynamic coefficient, accuracy of shooting, radial-axialprojectileAbstract
The article is devoted to the urgent problem of increasing the accuracy of firing radial-axial shells and their sensitivity to the complex of disturbing loads that arise during the shot. Considerable attention is paid to the study of the influence of the non-linearity of the axis of the gun barrel as one of the key factors. A qualitative method for assessing the sensitivity of radial-axial projectiles to a complex of disturbing loads that inevitably arise during the firing process is proposed. The research method consists in a detailed comparison of the natural frequencies of oscillations of radial-axial projectiles with the frequency spectrum of those disturbing loads that act on the projectile at the moment of firing and its movement through the barrel, which allows identifying potential resonance phenomena and assessingthe degree of influence of dynamic processes on the stability of projectiles.
An analysis of the influence of the ratio between the natural frequencies of the projectile and the frequencies of disturbing loads on the intensity of the development of oscillatory processes was carried out. A special criterion was introduced to quantitatively assess the influence - the dynamic coefficie. Aspects of the application of the proposed method for a comprehensive assessment of existing designs of radial-axial shells of various types are considered, and the level of their relative sensitivity to loads caused by the non-linearity of the axis of the barrel bore is determined.
The results of numerous calculations of dynamic coefficients for various types of radial-axial projectile vibrations occurring in both vertical and horizontal planes are presented. Also, statistical data in the form of percentages for a sample of tank gun barrels characterized by intense vibration modes of different types of radial-axial projectiles during firing. Thus, a method for qualitative assessment of the dynamic sensitivity of radial-axial projectiles is proposed, which combines the characteristics of external influences with the ballistic parameters of the projectile.
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