THE SCALE SIMULATION APPLICATION IN THE MILITARY VEHICLES ARMORING

Abstract

The armoring of the civilian vehicles during martial law requires the search for new parameters selecting methods that provide the required indicators of dynamic properties. The additional armored sheets installation on ordinary civilian vehicles leads to the weight increase, the center of mass position change and dynamic properties deterioration. Therefore, the ordinary civilian vehicles armoring can also be considered from the perspective of large-scale modeling. One of the ways to ensure the necessary dynamic indicators of the ordinary civilian vehicles when armoring is to use the theory of large-scale modeling due to the use of the mass scale as the main scale. In the study, using the theory of similarity, a system of scale coefficients was developed for choosing the main design parameters of armored vehicles. The dependences of engine power, wheel diameter and rigid suspension and tires, engine and transmission torques on the car reservation coefficient are obtained. The value of the indicator of the relevant parameters of the vehicle degree is given. The higher the degree indicator, the higher the sensitivity of the vehicle parameter to increase when armoring. It was determined that different physical (mechanical) quantities have different sensitivity to the increase in the weight of the vehicle. The greatest sensitivity is the value of the engine torque, and the least is the linear dimension. These dependencies can be used in the process of designing a car armoring. In addition, it was determined that there is a relationship between the maximum permissible parameter measurement error during dynamic tests of full-scale models and the maximum permissible parameter measurement error during full-scale machine testing. Іmproved requirements for the dynamic parameters measurement accuracy during armored vehicles tests are considered. During armored vehicles tests, the maximum permissible error of dynamic parameters measuring increases, which makes it possible not to use more complex measuring and recording equipment.