Most finite element models of small arms focus on an idealized barrel, typically one with a perfectly straight bore centerline. Using five different experimentally measured bore centerlines, this investigation analyzes the effect centerline nonlinearity has on projectile exit conditions. This includes the effect of rotating a centerline through several orientations. Modeled using Abaqus/Explicit, this dynamic analysis simulates a single firing cycle for each centerline. Projectile jump is calculated for each model as a measure of the effects of warped centerlines. The warped centerlines have a small effect on barrel dynamics.

中文翻译：

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膛线中心线对小型武器射弹射出条件的影响分析

大多数小型武器的有限元模型都关注理想化的枪管，通常是具有完美直孔中心线的枪管。本研究使用五种不同的实验测量孔中心线，分析了中心线非线性对射弹射出条件的影响。这包括通过多个方向旋转中心线的效果。使用 Abaqus/Explicit 建模，此动态分析模拟了每个中心线的单个点火周期。为每个模型计算射弹跳跃作为扭曲中心线影响的度量。弯曲的中心线对枪管动力学影响很小。