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Using performant modern technology, meaning high speed camera capable of recording images up to the speed of 1 million frames/second.
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Description of the equipment It have been used an optical method to record the bending vibrations of the barrel, The barrel cross section m mass of the barrel y=y(x) vertical deflection of barrel axis from its initial position, as a function of x-coordinate F(t) acting force, varying in time after a certain low. The differential equation of a constant cross section barrel bending vibration is : This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.Ĩ83 UnauthenticatedDownload Date | 2/15/17 8:37 PMīarrel (consequence of the clearance between the driving band of the projectile and the barrel grooves), by static disequilibrium (the projectile centre of mass is outside the axis of symmetry) and dynamic disequilibrium (some mobile parts of the weapon have the centre of mass outside the axis of symmetry). Bending vibrations are mainly caused by the pressure of hot gases produced from the burning propellant, but also by the forces occurring between the projectile and theĭOI: 10.1515/kbo-2015-0150 2015. The oscillation phase when the projectile exits the barrel is passed on to the projectile, causing the bullet to leave the barrel at a specific angle up against the original axis of the muzzle (ballistic jump), also with a vertical velocity and a vertical acceleration, therefore influencing the trajectory and the hitting point at the target. The most important factor of all is barrel oscillations, particularly the bending vibrations. Projectile (nutation of projectile at muzzle and the influence of propellant gases that flow out after firing) influence the kinematics of the bullet when it leaves the muzzle. The oscillations of the barrel, along with other initial perturbing factors of the The ballistic jump error is normally used, meaning the angle measured between the tangent to the axis of the bore at the bullet exit time (the point in time when the driving band of the projectile leaves the muzzle) and the same line before shooting. The jump error is understood to be the angle between a reference line drawn through the weapon barrel prior to firing the round and the actual initial flight direction (launch direction) of the projectile. IntroductionPrevious investigations of the jump have shown that vibrations of the barrel of a weapon during the firing process, transmitted into the entire body of the firearm, along with the dynamic couple generated by the recoil forces, cause the jump error. Keywords: vibratory movement, firing accuracy, bending vibrations, high speed cameraġ.
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This paper presents a method of recording the flexural vibrations of the barrel in the muzzle section of a 5,56mm automatic rifle and the influence of muzzle devices, using modern equipment (high speed cameras) and dedicated software. The most important ones are considered to be the flexural or bending vibrations, especially the ones recorded in the muzzle section. There are flexural, longitudinal, radial and torsional vibrations.
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Military Technical Academy, Bucharest, Romania, It is known that the forces and shocks that occur during the firing process of a firearm induce vibrations to the barrel of the weapon and to the weapon as a whole. THE ANALYSIS OF THE VIBRATORY MOVEMENT OF THE GUN BARREL AND ITS INFLUENCE ON THE FIRING ACCURACYĪlin-Constantin SAVA, Ioan-Liviu PITICARI, Diana-Georgeta NISTORAN, Cristian-Emil MOLDOVEANU International Conference KNOWLEDGE-BASED ORGANIZATION Vol.