外界条件对中空结构物内爆冲击波的影响

孟令存; 闫明; 杜志鹏; 张磊

doi:10.11858/gywlxb.20190849

外界条件对中空结构物内爆冲击波的影响

doi: 10.11858/gywlxb.20190849

孟令存^{1, 2,},
闫明^1,*, ,,
杜志鹏²,
张磊²

1.
沈阳工业大学机械工程学院，辽宁沈阳　110870
2.
海军研究院，北京　100161

基金项目: 国家自然科学基金（10672181）

详细信息

作者简介:
孟令存（1994－），男，硕士研究生，主要从事光电倍增管内爆研究. E-mail：1605733924@qq.com

通讯作者:
闫　明（1978－），男，博士，教授，主要从事设备抗冲击研究. E-mail：yanming7802@163.com

中图分类号: O381; U663.85
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出版历程
- 收稿日期: 2019-10-24
- 修回日期: 2019-11-09
- 刊出日期: 2020-03-25

Influence of External Conditions on Implosion Shock Wave of Hollow Structure

MENG Lingcun^{1, 2
,},
YAN Ming^{1,*
, ,},
DU Zhipeng²,
ZHANG Lei²

1.
School of Mechanical Engineering, Shenyang University of Technology, Shenyang 110870, Liaoning, China
2.
Naval Research Academy, Beijing 100161, China

摘要

摘要: 在深水中工作的中空结构物承受巨大的静水压，突然被压溃时会发生内爆，产生冲击波，对周围结构造成损伤。针对内爆冲击波受静水压力、真空体积影响机理不清的问题，开展了光电倍增管水下内爆试验，验证了ABAQUS中CEL耦合计算方法满足光电倍增管内爆模拟精度的要求，并通过数值模拟分析了外界静水压、中空结构物的真空体积对内爆冲击波的影响规律。结果表明：随着静水压、真空体积的增加，冲击波压力峰值呈线性增加，且距离内爆中心越远，冲击波峰值增加越缓慢；冲击波脉宽随静水压力的增加基本保持不变，随真空半径的增加缓慢降低。
- 水下内爆 /
- 光电倍增管 /
- 内爆机理 /
- 内爆仿真 /
- 内爆冲击波
Abstract: The hollow structure working in deep water is subjected to huge hydrostatic pressure. When it is suddenly crushed, it will explode and generate shock waves, and cause damages to the surrounding structure. Aiming at the problem that the implosion shock wave is affected unclearly by hydrostatic pressure and vacuum volume, the underwater implosion test of photomultiplier tube (PMT) was carried out. It was verified that the CEL coupling calculation method in ABAQUS satisfies the requirements of PMT implosion simulation accuracy, and then the effects of external hydrostatic pressure and vacuum volume of hollow structures on implosion shock waves were analyzed by simulation. The results show that with the increase of hydrostatic pressure and vacuum volume, the peak value of the shock wave increases linearly, and the farther away from the implosion center, the slower the increase of peak value of the shock wave. The pulse width of the shock wave remains basically unchanged with the increase of hydrostatic pressure, and decreases slowly with the increase of vacuum radius.
- underwater implosion /
- photomultiplier tube /
- mechanism of implosion /
- simulation of implosion /
- shock wave of implosion

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图 1 PMT实物

Figure 1. Picture of actual PMT

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图 2 压力罐示意图

Figure 2. Schematic of the pressure tank

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图 3 PMT内爆过程

Figure 3. Implosion process of PMT

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图 4 PMT内爆仿真模型

Figure 4. Implosion simulation model of PMT

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图 5 水域流场变化过程

Figure 5. Change process of flow field in the water

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图 6 内爆压力对比曲线

Figure 6. Comparison curves of implosion pressure

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图 7 内爆简化模型

Figure 7. Simplified model of implosion

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图 8 内爆水流涌入过程

Figure 8. Water influx of implosion

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图 9 压力时程曲线

Figure 9. Curves of pressure varied with time

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图 10 冲击波压力峰值和脉宽随测点距离变化曲线

Figure 10. Curves of shock wave peak and pulse width with measuring point distance

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图 11 冲击波压力峰值和脉宽随静水压变化曲线

Figure 11. Curves of shock wave peak and pulse width with hydrostatic pressure

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图 12 不同真空球体半径的冲击波压力时域曲线

Figure 12. Curves of shock wave pressure with time under different vacuum sphere radii

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图 13 冲击波压力峰值和脉宽随真空半径变化曲线

Figure 13. Curves of shock wave peak and pulse width with vacuum radius

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表 1 试验和模拟得到的冲击波压力峰值对比

Table 1. Comparison of tested and simulated shock wave pressure peaks

Measuring point
Pressure peak/MPa Error/%

Test Simulation

F₁ 14.63 11.28 22.90
F₂ 7.68 5.53 27.90
F₃ 6.18 5.53 10.51
F₄ 3.19 2.49 21.90

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表 2 拟合系数值

Table 2. Fitting coefficient values

Hydrostatic pressure/MPa a b

0.3 4.216 −1.067
0.4 4.957 −1.096
0.5 5.761 −1.084
0.6 6.488 −1.079
0.7 7.001 −1.107

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表 3 拟合系数值

Table 3. Fitting coefficient values

Measuring point distance/m c d

0.25 34.075 8.631
0.35 23.771 6.004
0.45 17.434 4.770
0.55 14.026 3.932
0.65 11.409 3.338

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表 4 拟合系数值

Table 4. Fitting coefficient values

Measuring point distance/m m n

0.25 147.97 −11.125
0.35 100.68 −7.623
0.45 74.26 −5.351
0.55 58.72 −3.998
0.65 47.55 −3.045

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参考文献(9)

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