SPH-FEM耦合方法在弹丸膛内运动中的应用

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振动与冲击 ›› 2019, Vol. 38 ›› Issue (8) : 166-172.

论文

孙玉杰，崔青春，丁宏民，徐坚，郭俊行

作者信息 +

Application of a three-dimensional FEM-SPH coupling method to projectile motion in a bore

SUN Yujie,CUI Qingchun,DING Hongmin,XU Jian,GUO Junhang

Author information +

文章历史 +

摘要

大口径火炮弹丸膛内运动是个高度非线性冲击动力学过程，采用有限元(FEM)与光滑粒子(SPH)耦合方法，结合SPH方法处理大变形能力和FEM计算效率高的互补优势，对大变形的弹带采用光滑粒子离散，发射系统的其它结构采用有限元模拟，综合考虑弹带材料的动态力学性能及损伤行为，弹带与身管内膛摩擦界面特性及火药燃气的波尔登效应，建立了较为全面的火炮发射动力学模型，成功模拟出弹丸挤进过程和随后直膛运动。通过与任意的拉格朗日－欧拉自适应网格(ALE)仿真结果相比验证了该方法的优越性，通过对比仿真结果与试验数据验证了其有效性，获得了弹丸膛内运动过程中弹带温度、炮口振动和弹丸运动姿态的变化规律，为火炮弹炮匹配设计及精度设计提供了参考。

Abstract

The projectile motion in a bore of large-caliber artillery is a highly nonlinear impact dynamics process.By adopting a coupling method of finite element method (FEM) and smooth particles hydrodynamics (SPH) and combining the SPH method to handle large deformation capacity with high efficiency FEM calculation, large deformation bands were discrete by smooth particles, other structures of launch system were modeled with finite element, a relatively overall large-caliber artillery launch dynamics model was established, which considered dynamic mechanical properties and damage behaviors of rotating bands, friction interface characteristics between rotating bands and barrel bore, the Bourdon effect of propellant gas et al.The engraving process and subsequent rectilinear-chamber motion of the projectile was successfully modeled.The superiority and validity of the proposed SPH-FEM coupling method was verified by comparing numerical simulation results with the results of an arbitrary Lagrangian-Eulerian method (ALE) and measurement data from living fire.Change rules of temperature distribution of rotating bands, vibrations of muzzle and motion attitude of projectile were obtained during projectile motion in the bore, which provides a reference for artillery projectile-barrel match design and firing accuracy design.

导出引用

孙玉杰，崔青春，丁宏民，徐坚，郭俊行. SPH-FEM耦合方法在弹丸膛内运动中的应用[J]. 振动与冲击, 2019, 38(8): 166-172

SUN Yujie,CUI Qingchun,DING Hongmin,XU Jian,GUO Junhang. Application of a three-dimensional FEM-SPH coupling method to projectile motion in a bore[J]. Journal of Vibration and Shock, 2019, 38(8): 166-172

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