Work

Ensuring the World-class Tactical and Technical Characteristics of Combat Armored Vehicles by Substantiating the Design and Technological Solutions for Elements of Loading Mechanisms: Basic Approaches and Models

Year: 2024

Type: article

Abstract: The work is aimed at ensuring high tactical and technical characteristics of domestic armored combat vehicles by increasing the contact strength of the most critical and loaded elements of the charging mechanisms. This is due to the fact that due to the conditions of combat operations in modern conditions, the load on these elements of armored combat vehicles is sharply increasing. In such conditions, traditional methods for calculating the contact strength of these elements by conditional stresses with correction factors are not applicable. Therefore, in the course of research, we improved the models of contact interaction based on the development of the theory of variational inequalities. This model includes both variable and sought-after modifications of the shape of the working surfaces of the contacting elements of armored combat vehicles and the properties of the materials of the surface layers. A search for progressive design and technological solutions for these elements has been carried out. This makes it possible to develop a new generation of charging mechanisms that allow for an increase in the caliber of weapon projectiles and the rate of fire from advanced standard weapons. Such advanced solutions make it possible to ensure the tactical and technical characteristics of domestic advanced armored combat vehicles at the world level. The regularities of the influence of the varied parameters (geometric shape and properties of surface layers) on the contact strength of the elements of the charging mechanisms of armored combat vehicles are established. In particular, a significant asymmetry of the area of contact interaction between rollers and drive sprockets was found. This effect is caused by the general deformation, first of all, of the rollers. In this case, the contact area is shifted to the periphery of the working surface. Accordingly, the modification of this working surface (the formation of a “barrel”) has a positive effect on the load capacity of the contacting elements. The levels of contact pressure and equivalent Mises stresses decrease.

Source: Bulletin of the National Technical University «KhPI» Series Engineering and CAD

DOI: 10.20998/2079-0775.2024.2.04