Threat factors from Lancet-type adversary UAVs and means of engineering protection against them, including the use of pre-detonation screens

The article analyzes the known parameters of the Russian Lancet-type unmanned aerial vehicles and the threats they pose to military equipment and facilities. Formulas and calculation parameters of damage factors are presented. The mechanisms of destruction of protective materials under the action of these factors were analyzed. It is shown that the main safety during the detonation of the warhead is provided by the cumulative jet. Calculations of engineering defense systems to increase the survivability of military equipment and structures were carried out. It has been proven that shelters should have both pre-detonation screens and an internal protective shell to neutralize all damage factors. Calculated distances at which the cumulative jet does not pose a significant danger and the combat part of unmanned aerial vehicles can be considered as high-explosive fragmentation. The proposed classification of the engineering protection system to increase the survivability of military equipment and structures, by categories, material and degree of protection. The main requirements that protective pre-detonation screens must meet are formulated. Examples of effective options for the arrangement of protective pre-detonation screens are considered, in particular, based on circular weaving nets. The strength of such products has been confirmed by numerical simulations in software complexes based on the finite element method, as well as by full-scale experiments conducted abroad. It was noted that mesh and lattice pre-detonation screens by themselves do not provide full protection, they are only able to create a safe distance from the anti-aircraft missile to the possible point of explosion of the combat part of the unmanned aerial vehicle, and also increase the chance of its trajectory being distorted and the detonator not detonating when it collides with the screen.