Dynamic of Tubes Crossed by High Speed Projectiles, Influence of Tube and Weapon Geometry on Accuracy and Dispersion

Chevalier, Ophélie; Liennard, Mathilda; Langlet, André; Guilmard, Yann; Mansion, Marcel; Bailly, Patrice

doi:10.12783/ballistics2017/16880

Cited by 3 publications

(1 citation statement)

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“…Although barrel vibrations can be accessed via strain gauges, laser-vibrometers or image-correlation techniques, measurement of the bullet's transverse motion during firing remains an unsolved problem. On-board accelerometers, which have successfully been used in large caliber weapons [1], are not readily available for small calibers due to the prevalent space limitations. This necessitates the use of numerical simulations to investigate the transverse motion of the projectile during the launch cycle.…”

Section: Introductionmentioning

confidence: 99%

A Numerical Analysis of the In-Bore Motion of Small Caliber Projectiles

Dutschke¹,

Hunzinger²,

Sättler³

2019

31st International Symposium on Ballistics

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Finite Element simulations have become a popular tool to investigate the mechanisms of launch dynamics. However, the common techniques for evaluating the simulation results in terms of target impact accuracy are far from ideal. This paper presents a method for the postprocessing of such simulations. The approach is based on a decomposition of the bullet's transverse motion during launch into a regular rotation caused by the rifling, irregular oscillations (balloting) and muzzle motion. Target impact dispersion is evaluated separately for each of these motion components, which provides a deeper understanding of the dynamic processes determining the weapon's hit performance. In contrast to traditional methods, where the assessment of dispersion requires large numbers of simulations with varying launch conditions, the evaluation of accuracy is based on a single simulation.

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Section: Introductionmentioning

confidence: 99%