大口径锥头弹体高速倾斜入水偏转规律数值模拟

陈建良 杨璞 李继承 陈刚 邓宏见 范志庚

陈建良, 杨璞, 李继承, 陈刚, 邓宏见, 范志庚. 大口径锥头弹体高速倾斜入水偏转规律数值模拟[J]. 爆炸与冲击. doi: 10.11883/bzycj-2023-0398
引用本文: 陈建良, 杨璞, 李继承, 陈刚, 邓宏见, 范志庚. 大口径锥头弹体高速倾斜入水偏转规律数值模拟[J]. 爆炸与冲击. doi: 10.11883/bzycj-2023-0398
CHEN Jianliang, YANG Pu, LI Jicheng, CHEN Gang, DENG Hongjian, FAN Zhigeng. Numerical simulation on the deflection behavior of large caliber conical nose projectile at oblique high-speed water entry[J]. Explosion And Shock Waves. doi: 10.11883/bzycj-2023-0398
Citation: CHEN Jianliang, YANG Pu, LI Jicheng, CHEN Gang, DENG Hongjian, FAN Zhigeng. Numerical simulation on the deflection behavior of large caliber conical nose projectile at oblique high-speed water entry[J]. Explosion And Shock Waves. doi: 10.11883/bzycj-2023-0398

大口径锥头弹体高速倾斜入水偏转规律数值模拟

doi: 10.11883/bzycj-2023-0398
基金项目: 四川省自然科学基金杰出青年科学基金(2023NSFSC1913)
详细信息
    作者简介:

    陈建良(1991- ),男,硕士,工程师,chen729@caep.cn

    通讯作者:

    陈 刚(1971- ),男,博士,研究员,chengang@caep.cn

  • 中图分类号: O353.4

Numerical simulation on the deflection behavior of large caliber conical nose projectile at oblique high-speed water entry

  • 摘要: 结合某大口径锥头弹体高速倾斜入水试验,采用任意拉格朗日-欧拉(arbitrary Lagrange-Euler,ALE)流固耦合方法对弹体倾斜入水偏转行为进行数值模拟。研究了弹体以500 m/s高速倾斜入水过程中不同受力模式、载荷变化特征以及弹体发生偏转的力学机理,分析了入水角度对弹体偏转规律的影响。结果表明:在俯仰力矩作用下,弹体均发生抬头方向偏转,且偏转速度呈现先增大后减小的趋势,偏转程度在不同入水角度范围内呈现不同的变化趋势。当入水角度小于15°时,弹体会发生“跳弹”现象;当入水角度为30°~60°时,弹体偏转趋势基本一致,均由初始倾斜状态逐渐转动至水平状态、竖直状态并最终以弹头入水反方向的“出水”姿态向水下运动;当入水角度为75°时,弹体转动至水平状态后,并未继续偏转至竖直状态,弹头以朝斜上方的姿态向水下运动;弹体的入水侵深随入水角度的增大而增大,且增大趋势近似满足指数函数关系。
  • 图  1  弹体和靶体有限元几何模型

    Figure  1.  Finite element model of the projectile and target

    图  2  弹体斜入水角度定义

    Figure  2.  Definition of inclined angle for oblique water entry of projectile

    图  3  试验系统示意图(正视图)

    Figure  3.  Schematic diagram of test system (front view)

    图  4  试验弹体及水箱的有限元模型(正视图)

    Figure  4.  Finite element model of projectile and water tank (front view)

    图  5  弹体入水偏转过程对比

    Figure  5.  Comparison of numerical deflection process with test

    图  6  弹体水中姿态对比

    Figure  6.  Comparison of numerical attitude with test

    图  7  水中空泡形态对比

    Figure  7.  Comparison of numerical cavity shape with test

    图  8  60°入水角度时弹体入水偏转过程

    Figure  8.  Trajectory deflection process of the projectile water entry under 60° entry angle

    图  9  弹体受力模式变化示意图

    Figure  9.  Variation of contact force mode on the penetrator during the penetration

    图  10  60°入水角度时弹体水平和竖直方向的载荷时程曲线

    Figure  10.  Variation of horizontal force and vertical force on the penetrator under 60° entry angle

    图  11  60°入水角度时弹体锥段和柱段的横向载荷时程曲线

    Figure  11.  Variation of lateral force of the cone head and cylinder under 60° entry angle

    图  12  60°入水角度时弹体锥段和柱段载荷引起的俯仰力矩时程曲线

    Figure  12.  Variation of pitch moment of the cone head and cylinder under 60° entry angle

    图  13  60°入水角度时弹体偏转角速度时程曲线

    Figure  13.  Variation of deflection angular velocity under 60° entry angle

    图  14  60°入水角度时弹体轴向和横向载荷时程曲线

    Figure  14.  Variation of axial force and lateral force on the penetrator under 60° entry angle

    图  15  不同入水角度时弹体的运动轨迹

    Figure  15.  Trajectory deflection process of the projectile under different entry angles

    图  16  不同入水角度时弹体的速度变化时程曲线

    Figure  16.  Variation of the velocity attenuation under different entry angles

    图  17  不同入水角度时弹体水平和竖直方向载荷时程曲线

    Figure  17.  Variation of horizontal force and vertical force on the penetrator under different entry angles

    图  18  不同入水角度时弹体轴向和横向载荷时程曲线

    Figure  18.  Variation of axial force and lateral force on the penetrator under different entry angles

    图  19  弹体偏转角和偏转角速度时程曲线

    Figure  19.  Variation of deflection angle and deflection angular velocity under different entry angles

    图  20  弹体俯仰角变化时程曲线

    Figure  20.  Variation of pitch angle under different entry angles

    图  21  弹体侵深与入水角度的关系

    Figure  21.  Relation between penetration depth and entry angles

    表  1  材料Johnson-Cook模型参数[21-22]

    Table  1.   Johnson-Cook model parameters of materials[21-22]

    材料 ρ/(kg·m–3) E/GPa ν cp/(J·kg–1·K–1) Tr/K Tm/K $\dot\varepsilon $/s–1 A/MPa B/MPa n C
    G50 7 620 205 0.28 469.0 300 1765 1 1 445 1 326 0.356 0.005
    7A04 2 850 69.35 0.33 921.0 293 878 1 602.5 732.1 0.753 0.014
    材料 m D1 D2 D3 D4 D5 c0/(m·s–1) S1 γ0 a
    G50 1.12 0.10 0.76 1.57 0 0 4280 1.99 2.00 0.46
    7A04 1.015 0.059 0.246 –2.41 –0.1 –0.1 5240 1.40 1.97 0.48
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出版历程
  • 收稿日期:  2023-11-02
  • 修回日期:  2023-12-26
  • 网络出版日期:  2024-03-04

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