为探究带攻角杆状弹高速入水的侵彻特性，采用LS-DYNA中的流固耦合算法，研究不同攻角下弹体速度、长径比对弹体入水后的剩余特性、空泡形状及弹体姿态的影响。结果表明：长杆弹入水后会发生弹体姿态翻转，经过一段时间弹体姿态稳定，而攻角较小时会发生二次翻转现象；长杆弹带攻角高速入水后弹头将产生非对称的墩粗侵蚀变形、整体塑性弯曲变形及2种变形模式的耦合；长径比小的弹体其破坏能力较小，弹道偏航较小，但姿态偏转较大；长径比较大的弹体破坏能力强，弹体姿态偏转较小，但弹道偏航距离较大；长径比越大的弹体对攻角的变化越敏感。
To reveal the penetration characteristics of long- rod projectile with angle of attack entering water at high velocity, fluid-structure coupling algorithm in LS-DYNA was adopted to study the influence of velocity and length-diameter ratio of projectile body at different angle of attack on residual characteristics, cavity shape and attitude of projectile body after entering water. The results show that the attitude of the long-rod projectile will turn over after it hits the water, and the attitude of the long rod will be stable after a period of time. After entering water at high speed with the angle of attack, the warhead will produce asymmetric coarse erosion deformation, integral plastic bending deformation and coupling of the two deformation modes. The projectile with small aspect ratio has smaller damage ability, smaller trajectory yaw, but larger attitude deflection. The projectile with a large aspect ratio has stronger damage ability, smaller attitude deflection, but larger trajectory yaw distance. The larger the aspect ratio is, the more sensitive the projectile is to the change of the Angle of attack.
2023,45(13): 6-13 收稿日期：2022-06-25
DOI：10.3404/j.issn.1672-7649.2023.13.002
分类号：U663.85
基金项目：国家自然科学基金资助项目（51979277）
作者简介：王克(1997-)，男，硕士研究生，研究方向为舰船抗爆抗冲击
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