结构变形对深侵彻弹体偏转的影响

何丽灵; 郭虎; 陈小伟; 颜怡霞; 李继承; 陈刚

doi:10.11883/bzycj-2023-0068

结构变形对深侵彻弹体偏转的影响

doi: 10.11883/bzycj-2023-0068

何丽灵^{1, 2,},
郭虎^{1, 2},
陈小伟^{3, 4},
颜怡霞^{1, 2, ,},
李继承^{1, 2},
陈刚^{1, 2}

1.
中国工程物理研究院总体工程研究所，四川绵阳 621999
2.
工程材料与结构冲击振动四川省重点实验室，四川绵阳 621999
3.
北京理工大学前沿交叉科学研究院，北京 100081
4.
北京理工大学爆炸科学与技术国家重点实验室，北京 100081

基金项目: 国家自然科学基金（11302210）；中国工程物理研究院创新与发展基金（CX20210031）；四川省自然科学基金（2023NSFSC1913）

详细信息

作者简介:
何丽灵（1984－　），女，博士，副研究员，heliling1984@139.com

通讯作者:
颜怡霞（1973－　），女，硕士，研究员，13990111459@163.com

中图分类号: O385
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- 文章访问数: 157
- HTML全文浏览量: 74
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- 被引次数: 0
出版历程
- 收稿日期: 2023-02-28
- 录用日期: 2023-07-04
- 修回日期: 2023-06-24
- 网络出版日期: 2023-07-13
- 刊出日期: 2023-09-11

Influence of structural deformation on the deflection of penetrator into concrete target with deep penetration

HE Liling^{1, 2
,},
GUO Hu^{1, 2},
CHEN Xiaowei^{3, 4},
YAN Yixia^{1, 2
, ,},
LI Jicheng^{1, 2},
CHEN Gang^{1, 2}

1.
Institute of Systems Engineering, China Academy of Engineering Physics, Mianyang 621999, Sichuan, China
2.
Shock and Vibration of Engineering Materials and Structures Key Laboratory of Sichuan Province, Mianyang 621999, Sichuan, China
3.
Advanced Research Institute for Multidisciplinary Science, Beijing Institute of Technology, Beijing 100081, China
4.
State Key Laboratory of Explosion Science and Technology, Beijing Institute of Technology, Beijing 100081, China

摘要

摘要: 钻地弹是打击地下工事的利器，弹道偏转是降低钻地弹侵彻效率的重要原因之一，弹道偏转的本质原因是弹体偏转，亟需快速且精确地预测多侵彻姿态下弹体的侵深与偏转角度。基于微分面力法，将计及有限大靶所有自由面影响的靶体响应力函数加载在弹体表面，快速模拟了弹体的运动和变形。靶体响应力函数和数值计算模型通过了试验校核。利用刚性弹与可变形弹的运动和变形的对比，剥离并分析了结构变形对弹体偏转的影响。分析显示，结构变形是可变形弹偏转的驱动源之一，其可改变弹体外力矩，并影响弹体瞬时偏转速度。相同条件下，可变形弹偏转角度大于刚性弹。随着弹体长径比减小、着靶速度降低及侵彻斜角增大，刚性弹偏转角度增大；而随着弹体长径比增大、侵彻斜角增大及弹体壁厚减小，可变形弹偏转角度增大。着靶速度对可变形弹偏转角度的影响不单调。当着靶速度不高于800 m/s、侵彻斜角不小于20°时，着靶速度越高、侵彻斜角越大、弹体长径比越大、壁厚越小，则结构变形对弹体偏转的贡献越大。为此，建议选择可变形弹分析非理想侵彻弹体的运动和变形，以提高分析精度与合理性。
- 弹体偏转 /
- 结构变形 /
- 刚体转动 /
- 自由面效应
Abstract: Earth penetration weapon (EPW) is commonly used to attack the underground target. However, the ballistic trajectory deflection, which is essentially caused by the deflection of the penetrator, commonly decreases the penetration efficiency of the penetrator. Thus, both the deflection angle and depth of penetration (DOP) of the projectile demand rapid and precise predictions. Based on the differential-areal-force-law (DAFL) approach, an analytical contact-resistant pressure is applied on the projectile surface in simulation. It represents the resistant force of the target and considers the free-surface effects of all surfaces of a finite concrete target. The simulation model is verified by comparing with the test results of the DOP and rotation angle of projectiles in open references. The influence of structural deformation upon the deflection of the penetrator is investigated by comparing the dynamics and movement of rigid and deformable projectiles. It indicates that the structural deformation drives the deformable projectile to deflect, which changes the total moment and instant angular velocity of the projectile. Under the same impact conditions, the rotation angle of the deformable projectile is usually larger than that of the rigid projectile. With the aspect ratio of projectile and impact velocity of the projectile decreasing, and the oblique angle of the projectile increasing, the rotation angle of the rigid projectile increases. However, for the deformable projectile, with the aspect ratio and oblique angle of the projectile increasing and the thickness of the projectile decreasing, the rotation angle of projectile increases. The rotation angle of deformable projectile does not monotonously increase with the impact velocity of the projectile increasing. It should be analyzed according to its actual structural deformation. When the impact velocity is less than or equal to 800 m/s and the oblique angle of the projectile is larger than or equal to 20°, the higher the impact velocity, the larger the oblique angle and the aspect ratio, the thinner the thickness of the projectile, the structural deformation contributes larger deflection of the projectile. In this way, to promote the accuracy and reasonability of simulation, it is suggested that the projectile should be deformable when the deformation and dynamics of the projectile are demanded for non-ideal penetration of a penetrator.
- deflection of penetrator /
- structural deformation /
- rotation of rigid body /
- effect of free surface of target

HTML全文

图 1 环氧树脂屈服后的应力-应变关系

Figure 1. Plastic stress-strain curve of epoxy resin

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图 2 刚性弹和可变形弹的侵深计算结果与试验结果^[10]的对比

Figure 2. Comparison of the depth of penetration between simulation results and test results^[10] of rigid and deformable projectiles

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图 3 弹体平面内转动角度计算示意图

Figure 3. Schematic diagram of the rotation angle of the projectile

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图 4 斜侵彻时刚性弹和可变形弹偏转角度的数值模拟结果与试验结果^[10]的对比

Figure 4. Comparison of the rotation angle between simulation and test results^[10] of rigid and deformable projectiles

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图 5 刚性弹与可变形弹的偏转角度和角速度的对比（Ⅲ-2）

Figure 5. Comparison of rotation angle and angular velocity between rigid and deformable projectiles (Ⅲ-2)

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图 6 刚性弹与可变形弹绕质心的转动力矩的对比（Ⅲ-2）

Figure 6. Comparison of moments between rigid and deformable projectiles (Ⅲ-2)

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图 7 可变形弹不同时刻的弹靶位置（Ⅲ-2）

Figure 7. Relative locations of the deformable projectile and target at typical times (Ⅲ-2)

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图 8 不同时刻可变形弹的形貌和塑性变形分布（Ⅲ-2）

Figure 8. Deformation and distribution of plastic strain of the deformable projectile at different times ( Ⅲ-2)

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图 9 刚性弹与可变形弹侵彻阻力的对比（Ⅲ-2）

Figure 9. Comparison of penetration resistance force between rigid and deformable projectiles (Ⅲ-2)

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图 10 刚性弹和可变形弹的偏转角度随着靶速度和侵彻斜角的变化

Figure 10. Variations of the rotation angles of rigid and deformable projectiles with impact velocity and oblique angle, respectively

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图 11 刚性弹和可变形弹的偏转角度随弹体结构特征的变化

Figure 11. Variations of the rotation angles of rigid and deformable projectiles with structural characteristics

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图 12 结构变形对偏转角度的贡献与刚性弹偏转角度之比随着靶速度与侵彻斜角的变化

Figure 12. Variations of the rotation ratio of rotation angle induced by structural deformation to that of the rigid projectile with impact velocity and oblique angle, respectively

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图 13 结构变形对偏转角度的贡献与刚性弹偏转角度之比随弹体结构特征的变化

Figure 13. Variation of the rotation ratio of rotation angle induced by structural deformation to that of the rigid projectile with structural characteristics

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表 1 弹体的特征参数与尺寸^[10]

Table 1. Characteristic parameters and dimensions of projectiles^[10]

弹型	质量/g	直径/ mm	弹长/ mm	长径比	质心系数	转动惯量/ （g·m²）	弹头曲径比	外壳				填塞体
弹型	质量/g	直径/ mm	弹长/ mm	长径比	质心系数	转动惯量/ （g·m²）	弹头曲径比	材料	密度/ (kg·m⁻³)	厚度/mm	无量纲厚度	材料	密度/ (kg·m⁻³)
Ⅰ	314	25.3	151.8	6	0.573	0.59	3	DA6	7 850	2.65	0.10	环氧树脂	1 650
Ⅱ	359	25.3	151.8	6	0.571	0.63	3	DA6	7 850	3.80	0.15	环氧树脂	1 650
Ⅲ	415	25.3	202.4	8	0.555	1.41	3	DA6	7 850	2.65	0.10	环氧树脂	1 650
Ⅳ	481	25.3	202.4	8	0.553	1.54	3	DA6	7 850	3.80	0.15	环氧树脂	1 650
Ⅴ	516	25.3	253.0	10	0.545	2.75	3	DA6	7 850	2.65	0.10	环氧树脂	1 650
Ⅵ	604	25.3	253.0	10	0.543	3.06	3	DA6	7 850	3.80	0.15	环氧树脂	1 650

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表 2 文献[10]中的弹体着靶姿态

Table 2. Impact conditions of projectiles in Ref. [10]

弹型	组1			组2			组3
	侵彻斜角/(º)		着靶速度/ (m∙s⁻¹)	侵彻斜角/(º)		着靶速度/ (m∙s⁻¹)	侵彻斜角/(º)		着靶速度/ (m∙s⁻¹)
	设计值	实际值	着靶速度/ (m∙s⁻¹)	设计值	实际值	着靶速度/ (m∙s⁻¹)	设计值	实际值	着靶速度/ (m∙s⁻¹)
Ⅰ	0	0	775	20	19.6	815	30	27.9	815
Ⅱ	0	0	765	20	20.0	767	30	30.6	769
Ⅲ	0	0	721	20	24.0	723	30	29.4	721
Ⅳ	0	0	674	20	17.0	681	30	30.1	676
Ⅴ	0	0	656	20	19.0	657	30	30.1	656
Ⅵ	0	0	615	20	18.0	613	30	31.6	620

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表 3 混凝土靶参数^[10]

Table 3. Parameters of concrete target^[10]

密度/(kg·m⁻³)	无约束抗压强度/MPa	直径/mm	最长母线长度/mm	斜面角度/(º)	骨料
密度/(kg·m⁻³)	无约束抗压强度/MPa	直径/mm	最长母线长度/mm	斜面角度/(º)	材料	强度/MPa	平均直径/mm
2 400	45	640	885	20	石灰石	60～80	8

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