A method for calculating underwater explosion shock wave parameters of slender cone-shaped charges

XU Weizheng; HUANG Chao; ZHANG Pan; HUANG Yu; ZENG Fan; WANG Xing; ZHENG Xianxu

doi:10.11883/bzycj-2021-0095

Volume 42 Issue 1

Jan. 2022

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XU Weizheng, HUANG Chao, ZHANG Pan, HUANG Yu, ZENG Fan, WANG Xing, ZHENG Xianxu. A method for calculating underwater explosion shock wave parameters of slender cone-shaped charges[J]. Explosion And Shock Waves, 2022, 42(1): 014203. doi: 10.11883/bzycj-2021-0095

Citation:

XU Weizheng, HUANG Chao, ZHANG Pan, HUANG Yu, ZENG Fan, WANG Xing, ZHENG Xianxu. A method for calculating underwater explosion shock wave parameters of slender cone-shaped charges[J]. Explosion And Shock Waves, 2022, 42(1): 014203. doi: 10.11883/bzycj-2021-0095

Citation:

XU Weizheng, HUANG Chao, ZHANG Pan, HUANG Yu, ZENG Fan, WANG Xing, ZHENG Xianxu. A method for calculating underwater explosion shock wave parameters of slender cone-shaped charges[J]. Explosion And Shock Waves, 2022, 42(1): 014203. doi: 10.11883/bzycj-2021-0095

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A method for calculating underwater explosion shock wave parameters of slender cone-shaped charges

doi: 10.11883/bzycj-2021-0095

XU Weizheng^1
,,
HUANG Chao^{2, 3
,
,},
ZHANG Pan^{2, 3},
HUANG Yu¹,
ZENG Fan^{2, 3},
WANG Xing^{2, 3},
ZHENG Xianxu¹

1.
Institute of Fluid Physics, China Academy of Engineering Physics, Mianyang 621999, Sichuan, China
2.
Software Center for High Performance Numerical Simulation, China Academy of Engineering Physics, Beijing 100088, China
3.
Institute of Applied Physics and Computational Mathematics, Beijing 100088, China

Received Date: 2021-03-19
Accepted Date: 2021-12-01
Rev Recd Date: 2021-06-14

Available Online: 2021-12-02

Publish Date: 2022-01-20

Abstract

Abstract

In order to estimate the underwater explosion shock wave pressure of slender cone-shaped charges and to study the characteristic of long duration shock waves, an engineering model based on the superposition principle was proposed. Cone-shaped charges are usually used to simulate the far-field shock wave of large equivalent explosives, and the wave strength is generally on the order of MPa, which can be regarded as a weak shock wave, so the problem can be simplified based on the acoustic approximation assumption. Based on the above analysis, the cone-shaped charge is divided into several small charges, and then the shock wave pressure generated by each small charge in the water is superimposed according to the propagation order of the detonation wave to obtain the shock wave pressure curve of the whole cone-shaped charge. The validity of the model was verified through experimental results. Then, the transmission characteristics and the pressure profile of the shock wave at different azimuths of the cone-shaped charge were analyzed. The results show that the shock wave is anisotropic around the charge. Long duration, low amplitude shock waves with a thick wave head are generated at the detonation end. Exponential decaying shock waves with high amplitude are formed on the side of the charge, while on the opposed side of the detonation end the amplitude and duration of the shock wave are between the former two. The differences in the shock wave distributions between the cone-shaped and spherical charges are related to their shapes and detonation methods. Due to the differences in the explosion initiation times of different parts of the explosive charge, the superimposition effect of shock waves at different azimuths is obviously different, which result in an anisotropic pressure field. The proposed method is in good agreement with the experimental and numerical simulation results, which can provide reference and basis for the power and damage assessment of the underwater explosion shock wave of the cone-shaped charges.s of cone-shaped charges.
- underwater explosion,
- shock wave,
- cone-shaped charge,
- long duration pressure

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References(14)

References

[1]	COLE R H. Underwater explosions [M]. New Jersy: Princeton University Press, 1948: 252−253.
[2]	STERNBERG H M. Underwater detonation of pentolite cylinders [J]. The Physics of Fluids, 1987, 30(3): 761–769. DOI: 10.1063/1.866326.
[3]	HAMMOND L. Underwater shock wave characteristics of cylindrical charges: DSTO-GD-0029 [R]. Australia: Aeronautical and Maritime Research Laboratory, 1995.
[4]	刘磊, 郭锐, 裴善报, 等. 柱形装药水下爆炸远场冲击波压力峰值分布 [J]. 振动与冲击, 2016, 35(17): 66–70; 76. DOI: 10.13465/j.cnki.jvs.2016.17.011. LIU L, GUO R, PEI S B, et al. Far-field shock wave peak pressure distribution for underwater explosion of cylindrical charges [J]. Journal of Vibration and Shock, 2016, 35(17): 66–70; 76. DOI: 10.13465/j.cnki.jvs.2016.17.011.
[5]	张弛宇, 郭锐, 刘荣忠, 等. 水下爆炸柱型装药与球形装药远场等效关系 [J]. 鱼雷技术, 2017, 25(1): 65–70. DOI: 10.11993/j.issn.1673-1948.2017.01.0013. ZHANG C Y, GUO R, LIU R Z, et al. Equivalent relationship between cylindrical charge and spherical charge for underwater explosion [J]. Torpedo Technology, 2017, 25(1): 65–70. DOI: 10.11993/j.issn.1673-1948.2017.01.0013.
[6]	HUANG C, LIU M B, WANG B, et al. Underwater explosion of slender explosives: directional effects of shock waves and structure responses [J]. International Journal of Impact Engineering, 2019, 130: 266–280. DOI: 10.1016/j.ijimpeng.2019.04.018.
[7]	黄超, 汪斌, 张远平, 等. 柱形装药自由场水中爆炸气泡的射流特性 [J]. 爆炸与冲击, 2011, 31(3): 263–267. DOI: 10.11883/1001-1455(2011)03-0263-05. HUANG C, WANG B, ZHANG Y P, et al. Behaviors of bubble jets induced by underwater explosion of cylindrical charges under free-field conditions [J]. Explosion and Shock Waves, 2011, 31(3): 263–267. DOI: 10.11883/1001-1455(2011)03-0263-05.
[8]	黄超, 汪斌, 刘仓理, 等. 非球形水下爆炸气泡坍塌机制 [J]. 高压物理学报, 2012, 26(5): 501–507. DOI: 10.11858/gywlxb.2012.05.004. HUANG C, WANG B, LIU C L, et al. On the mechanism of non-spherical underwater explosion bubble collapse [J]. Chinese Journal of High Pressure Physics, 2012, 26(5): 501–507. DOI: 10.11858/gywlxb.2012.05.004.
[9]	ZHANG Z F, WANG L K, MING F R, et al. Application of Smoothed Particle Hydrodynamics in analysis of shaped-charge jet penetration caused by underwater explosion [J]. Ocean Engineering, 2017, 145: 177–187. DOI: 10.1016/j.oceaneng.2017.08.057.
[10]	HUNTER K S, GEERS T L. Pressure and velocity fields produced by an underwater explosion [J]. The Journal of the Acoustical Society of America, 2004, 115(4): 1483–1496. DOI: 10.1121/1.1648680.
[11]	GEERS T L, HUNTER K S. An integrated wave-effects model for an underwater explosion bubble [J]. The Journal of the Acoustical Society of America, 2002, 111(4): 1584–1601. DOI: 10.1121/1.1458590.
[12]	GIROUX E D. HEMP user’s manual: UCRL-51079 [R]. Livermore: Lawrence Livermore National Laboratory, 1973. DOI: 10.2172/4304397.
[13]	KNOCK C, DAVIES N, REEVES T. Predicting blast waves from the axial direction of a cylindrical charge [J]. Propellants, Explosives, Pyrotechnics, 2015, 40(2): 169–179. DOI: 10.1002/prep.201300188.
[14]	BJARNHOLT G. Suggestions on standards for measurement and data evaluation in the underwater explosion test [J]. Propellants, Explosives, Pyrotechnics, 1980, 5(2/3): 67–74. DOI: 10.1002/prep.19800050213.