硬目标内弹体斜侵彻状态的基本演化特性

doi:10.12382/bgxb.2023.0865

摘要/Abstract

摘要：

为归纳已有硬目标内弹体斜侵彻受力和运动模型的普遍模式,基于刚性弹假设和弹靶分离思想,将弹体侵彻硬目标的过程视为侵彻力场中的运动。依据侵彻力场的时间平移不变性和关于正侵彻的对称性,推导了不依赖具体受力模型的弹道稳定性和弹体状态参数演化的共有规律。具体地,在正侵彻工况下、弹体完全侵入硬目标时,给出了弹体运动稳定性判据;在斜侵彻工况下或弹体不完全侵入硬目标时,也给出了弹体运动平衡性与稳定性判据的数值求解方法。上述判据均表明弹体速度、角速度和攻角对于弹体侵彻状态演化有重要影响,而攻角的影响最为显著。此外,对于侵彻过程中的任意时刻,还依据分析力学方法证明了侵彻状态演化的封闭性。上述关于弹体运动平衡性、稳定性和状态演化封闭性的推导具有通用性质,可为侵彻试验和仿真工况的设计提供指导。

关键词: 斜侵彻, 弹道稳定性, 侵彻力场, 攻角

Abstract:

To summarize the general patterns of force and motion models for oblique penetration of projectiles, the penetration process of projectile against hard targets is regarded as the motion in the penetration force field based on the assumption of rigid projectile and the idea of projectile-target separation. The common law of ballistic stability and state-parameter evolution of projectile,which is independent of force models’ form, is derived based on the time translation invariance of force field and the symmetry of normal penetration. Specifically, a criterion for the motion stability of projectile in the case of normal penetration and the projectile completely penetrating in hard target can be given. The numerical solution methods for the balance and stability criteria of projectile motion in the case of oblique or incomplete penetration, are also provided. All types of criteria indicate that the penetration velocity, angular velocity, and angle of attack have the important significant impacts on the evolution of penetration state, where the angle of attack has the most significant impacton the evolution of penetration state. In addition, for any moment during the penetration process, the closeness of the penetration evolution is also proven with analytical mechanics method. The derived characteristics of projectile motion can provide guidance for the design of penetration test and simulation.

Key words: oblique penetration, ballistic stability, penetration force field, angle of attack

中图分类号:

TJ301
TJ302

陈柏翰, 沈子楷, 邹慧辉, 王伟光, 王可慧. 硬目标内弹体斜侵彻状态的基本演化特性[J]. 兵工学报, 2023, 44(S1): 59-66.

CHEN Baihan, SHEN Zikai, ZOU Huihui, WANG Weiguang, WANG Kehui. Basic Evolution Characteristics of Oblique Penetration of Projectile against Hard Target[J]. Acta Armamentarii, 2023, 44(S1): 59-66.

图/表 5

图1 惯性系定义(其中弹体处于初始位置)

Fig.1 Definition of inertial frame, where the projectile is in its initial position

图2 典型工况下角速度和攻角的微分流形

Fig.2 Differentiable manifolds of angular velocity and angle of attack under typical condition

图3 典型工况下的Φ曲面(v=300 m/s空腔膨胀模型的μ值分别取0.05和0.1)

Fig.3 Manifold of Φ under typical condition with v=300 m/s, friction factors of 0.05 and 0.1

图4 速度-攻角演化曲线和速度-角速度演化曲线

Fig.4 Evolution curves of velocity-angle of attack and velocity-angular velocity

图5 试验研究[18]给出的速度-侵深规律

Fig.5 Velocity-penetration depth experiment in Ref.[18]

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