小口径火炮弹炮耦合动态响应有限元时程分析

苏忠亭;徐达;李晓伟;韩振飞

振动与冲击 ›› 2012, Vol. 31 ›› Issue (23) : 104-108.

PDF(1476 KB)
PDF(1476 KB)
振动与冲击 ›› 2012, Vol. 31 ›› Issue (23) : 104-108.
论文

小口径火炮弹炮耦合动态响应有限元时程分析

  • 苏忠亭1, 徐达1,李晓伟2,韩振飞1
作者信息 +

Finite-element Time-history Analysis of Dynamic Response of Small-caliber Guns Projectile-barrel Coupling

  • SU Zhong-ting1,XU Da1,LI Xiao-wei2,HAN Zhen-fei1
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文章历史 +

摘要

基于移动荷载思想应用有限单元法和悬臂梁理论研究了小口径火炮弹丸膛内运动过程中的身管振动情况。应用圆柱坐标系将身管结构离散为标准的扇形单元,依据弹带凹槽部和凸起部沿膛线运动过程对各单元进行编号,将弹带视为弹塑性体,凹槽部应用线性简化模型,凸起部应用Dubowsky模型,身管简化为柔性变截面悬臂梁,考虑弹带挤进过程和刚体前定心部对内膛的瞬态碰撞规律,将弹丸膛内运动过程分为三个阶段,根据工程梁理论建立了移动弹丸作用下身管径向振动的时变动力学方程。将计算结果与炮口振动实验数据相比较,可知在忽略火炮后坐、摇架、炮塔等结构影响下,弹炮耦合模型比较准确。

Abstract

The small-caliber tube vibration when projectile moving in bore was studied applying finite element method and cantilever beam theory based on moving load theory. First the tube structure was discretized into normal sector elements in cylindrical coordinate which were numbered according to the moving process in chamber of projectile rotating band concave parts and bulges. Then the moving process in chamber was separated to three phases considering driving band engraving process and transient collision laws between rigid front band and chamber taking rotating band as elastoplasts, concave parts as linear predigest model, bulges as Dubowsky model and tube as flexible uniform cantilever beam. Lastly the time-variant dynamic equations of tube radial vibration subjected to a moving projectile were set up according to the Euler-Bernoulli beam theory. Ignoring the influence such as recoil, cradle and barbette, the projectile-barrel coupling model was proved to be equivalent to the real station by comparing with the muzzle vibration experiment data.

关键词

小口径火炮 / 弹炮耦合 / 有限单元法 / 悬臂梁 / Dubowsky模型

Key words

Small-caliber guns / Projectile-barrel coupling / Finite element method / Cantilever beam / Dubowsky model

引用本文

导出引用
苏忠亭;徐达;李晓伟;韩振飞. 小口径火炮弹炮耦合动态响应有限元时程分析[J]. 振动与冲击, 2012, 31(23): 104-108
SU Zhong-ting;XU Da;LI Xiao-wei;HAN Zhen-fei. Finite-element Time-history Analysis of Dynamic Response of Small-caliber Guns Projectile-barrel Coupling[J]. Journal of Vibration and Shock, 2012, 31(23): 104-108

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