Eventos Anais de eventos
COBEM 2023
27th International Congress of Mechanical Engineering
Computational Analysis Of Weapons Shooting Accuracy Under Vibrations Conditions
Submission Author:
Dante Ricardo Ambrosio , SP
Co-Authors:
Dante Ricardo Ambrosio, Domingos Rade
Presenter: Dante Ricardo Ambrosio
doi://10.26678/ABCM.COBEM2023.COB2023-2342
Abstract
In several situations involving defense or public safety actions, shooters must operate weapons while boarded in moving vehicles, subject to mechanical vibrations. This is the case, for example, of operations carried out from helicopters. Under these conditions, shooting accuracy tends to be compromised by vibrations transmitted from the vehicle to the armament, through the shooter's body and/or support devices. To minimize this transmission of vibrations, specialized troops use elastic hope to support the weapons when shooting. In this context, the present study deals with the effectiveness and performance of these elastic hope to prevent aircraft vibration from compromising the dispersion of shots fired. These shots are carried out by a light weapon, of the rifle type. The procedure involves two main stages, namely: a) the dynamic modeling of the ropes that support the armament. This model allows obtaining the three-dimensional vibration history of the gun barrel end, in terms of its position and velocity; b) the modeling of the exterior ballistics, which allows the determination of the trajectory of the projectile, based on the initial conditions obtained in step a). The study begins with the description of the modeling procedures, followed by the definition of a case study typically found in situations of practical interest. Next, results of several numerical simulations are presented. In these, the influence of several parameters, such as frequency and amplitude of vibrations, and the flexibility of the weapon supports, on the shooting accuracy is evaluated. The study carried out provides means for evaluating this type of operation.
Keywords
Weaponry Vibrations, structural dynamics, exterior ballistics
