1. 清华大学 工程物理系, 北京 100084
2. 西北核技术研究所, 陕西 西安 710024
*邮箱: wangkehui@nint.ac.cn
收稿:2023-09-05,
网络出版:2024-01-03,
纸质出版:2023-12-08
移动端阅览
陈柏翰, 王笠镔, 邹慧辉, 等. 自旋对弹体侵彻效应的影响[J]. 兵工学报, 2023,44(S1):117-124.
Baihan CHEN, Libin WANG, Huihui ZOU, et al. Influence of Spin on the Penetration Effect of Projectile[J]. Acta Armamentarii, 2023, 44(S1): 117-124.
陈柏翰, 王笠镔, 邹慧辉, 等. 自旋对弹体侵彻效应的影响[J]. 兵工学报, 2023,44(S1):117-124. DOI: 10.12382/bgxb.2023.0864.
Baihan CHEN, Libin WANG, Huihui ZOU, et al. Influence of Spin on the Penetration Effect of Projectile[J]. Acta Armamentarii, 2023, 44(S1): 117-124. DOI: 10.12382/bgxb.2023.0864.
为解释带有自旋角速度的侵彻弹体在试验和仿真中的更好表现
开发了考虑自旋角速度的弹体侵彻模型。姿态动力学分析表明了一般侵彻情况下自旋角速度引起弹体非平面运动
正侵彻情况下则出现自旋弹体保持平面运动的特殊情况。基于空腔膨胀模型的推导表明
弹靶接触处的切应力方向改变是自旋弹体侵彻阻力减小的原因之一
与剪切效应导致的空腔表面正应力衰减共同构成了侵彻深度增加的机制。刚体运动学推导表明
多层间隔靶侵彻情况下
靶间进动导致弹体轴线与靶面法向夹角增速减缓甚至减小
是弹道稳定性增加的重要原因。自旋角速度改变了弹体侵彻过程的受力和运动形式
导致其侵彻深度和弹道稳定性增加
总体上对弹体侵彻效应起积极作用。
A projectile penetration model considering spin angular velocity is developed to explain the better performance of penetrating projectile with spin angular velocity in experiment and simulation. The effect of spin angular velocity on the projectile penetration behavior is revealed through theoretical research and simulation. The attitude dynamics analysis shows that the spin angular velocity causes the non-planar motion of projectile in general penetration cases
while the spinning projectile maintains planar motion only in ideal penetration. The derivation based on the cavity expansion theory indicates that the change in the direction of shear stress on the contact surface between projectile and target is one of the reasons for the decrease of penetration resistance. Together with the attenuation of normal stress on the cavity surface caused by shear effect
it forms the mechanism for the increase in penetration depth. The derivation of rigid body kinematics shows that the precession between targets leads to a slowdown or even decrease in the angle of fall
which is an important reason for the increase of ballistic stability in the case of multi-layered target penetration. Therefore
the spin angular velocity changes the force and motion mechanism of projectile throughout penetration
leading to the increase of its penetration depth and ballistic stability.
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