Study on Pressure Field Characteristics of Underwater Explosion of Neighbor Air Domain Charge Structure

doi:10.12382/bgxb.2023.1099

Abstract

Abstract:

In order to control the energy distribution of underwater explosion of explosive for the directional striking,the distribution characteristics of the explosion pressure field of a typical explosive-air column charge structure are studied.The pressure and impulse distribution of underwater explosions of explosives with different sizes of air domains are explored through experiment and numerical simulation.It is found that the air domain has a directional enhancement effect on the underwater explosions.The simulated results show that the air domain would cause the explosive products to impact the air-water boundary,resulting in an enhancement of peak pressure in the direction of the air domain in the near field water.With the change in bubble morphology,a vase-shaped bubble isolating energy is formed,leading to an enhancement of impulse behind the air domain.The above enhancement effects gradually disappear with the increase in distance,and the influence range of the impulse enhancement effect is wider.The research results indicate that the presence of air domain can significantly enhance the destructive effect within the near field in that direction.

Key words: underwater explosion, charge structure, bubble dynamics, energy distribution

CLC Number:

O382+.1

YANG Ke, ZHOU Zhangtao, MA Honghao, YAO Xiangyang, FU Liheng, XU Qingtao, SHEN Zhaowu. Study on Pressure Field Characteristics of Underwater Explosion of Neighbor Air Domain Charge Structure[J]. Acta Armamentarii, 2025, 46(1): 231099-.

Figures/Tables 21

Fig.1 Neighbor air domain charge structure

Fig.2 Schematic diagram of detonation wave action

Fig.3 PVDF pressure measuring circuit

Fig.4 Experiment layout

Fig.5 Convergence analysis

Fig.6 Numerical calculation model

Table 1 JWL parameters of TNT explosive

ρ₀/ (g·cm^-3)	D/ (m·s^-1)	A/ GPa	B/ GPa	R₁	R₂	ω	e/ (J·g^-1)
1.63	6900	371	3.2	4.15	0.95	0.3	7000

Table 2 Equation of state parameters for water

ρ₀/(g·cm^-3)	c(cm·μs^-1)	γ₀	a	S₁	S₂	S₃
1	0.164 7	0.5	0	2.56	1.986	1.226 8

Table3 Equation of state parameters for air

C₁	C₂	C₃	C₄	C₅	C₆
0	0	0	0.4	0.4	0

Table 4 Parameters of steel

A/MPa	B/MPa	C	m	n	T_m
293	230	0.0652	0.706	0.578	1795

Fig.7 Comparison of experimental and numerical results

Fig.8 Comparison of steel plate deformations

Fig.9 Deflection of the deformed plate after experiment

Table 5 Parameters of each case

炸高与空气域高度	K
炸高与空气域高度	0	0.5	1.0	1.5	2.0
炸药高度/mm	20	20	20	20	20
空气域高度/mm	0	10	20	30	40

Fig.10 Peak pressure distribution under each condition

Fig.11 Impulse distribution under each condition

Fig.12 Pressure-time curves of measuring points under different conditions

Fig.13 The peak pressure(left) and mass flow nephograms(right) of measuring points at the K=1 boundaries

Fig.14 Development of boundary external energy under different conditions(left:pressure cloud image,and right:material flow cloud image)

Fig.15 Shock wave peak pressure distribution

Fig.16 Impulse distributions in all directions

References 23

[1]	COLE R H. Underwater explosion[M]. Princeton, NJ, US: Princeton University Press, 1948.
[2]	ZHANG A M, LI S M, CUI P, et al. A unified theory for bubble dynamics[J]. Physics of Fluids, 2023, 35(3):033323.
[3]	武海军, 成乐乐, 陈文戈, 等. 典型舰船结构的水下爆炸耦合毁伤研究进展[J]. 北京理工大学学报, 2023, 43(5):439-459.
	WU H J, CHENG L L, CHEN W G, et al. Review on coupling damage effects of underwater explosion on typical ship structures[J]. Transactions of Beijing Institute of Technology, 2023, 43(5):439-459. (in Chinese)
[4]	张阿漫, 明付仁, 刘云龙, 等. 水下爆炸载荷特性及其作用下的舰船毁伤与防护研究综述[J]. 中国舰船研究, 2023, 18(3):139-154,196.
	ZHANG A M, MING F R, LIU Y L, et al. Review of research on underwater explosion related to load characteristics and ship damage and protection[J]. Chinese Journal of Ship Research, 2023, 18(3):139-154,196. (in Chinese)
[5]	秦健, 张延泽, 孟祥尧, 等. 近场水下爆炸过程中气泡脉动与射流载荷特性研究[J]. 中国科学:物理学力学天文学, 2022, 52(12):92-105.
	QIN J, ZHANG Y Z, MENG X Y, et al. Research on bubble pulsation and jet loading characteristics during a near-field underwater explosion[J]. Science China Physics, Mechanics & Astronomy, 2022, 52(12):92-105. (in Chinese)
[6]	姚熊亮, 刘文韬, 张阿漫, 等. 水下爆炸气泡及其对结构毁伤研究综述[J]. 中国舰船研究, 2016, 11(1):36-45.
	YAO X L, LIU W T, ZHANG A M, et al. Review of the research on underwater explosion bubbles and the corresponding structural damage[J]. Chinese Journal of Ship Research, 2016, 11(1):36-45. (in Chinese)
[7]	黄亮亮, 王林桂, 张西良, 等. 空气层对RDX水下爆炸性能影响的实验研究[J]. 工程爆破, 2021, 27(5):32-38.
	HUANG L L, WANG L G, ZHANG X L, et al. Experimental study on the influence of air layer on the underwater explosion properties of RDX[J]. Engineering Blasting, 2021, 27(5):32-38. (in Chinese)
[8]	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
[9]	马腾, 王金相, 刘亮涛, 等. 不同长径比柱形装药水下爆炸冲击波演化规律[J]. 振动与冲击, 2022, 41(8):149-157,222.
	MA T, WANG J X, LIU L T, et al. Shock wave evolution of cylindrical charge with different slender ratios[J]. Journal of Vibration and Shock, 2022, 41(8):149-157,222. (in Chinese)
[10]	李金河, 汪斌, 王彦平, 等. 不同装药形状TNT水中爆炸近场冲击波传播的实验研究[J]. 火炸药学报, 2018, 41(5):461-464,500. doi: 10.14077/j.issn.1007-7812.2018.05.007
	LI J H, WANG B, WANG Y P, et al. Experimental study on near-field shock wave propagation of underwater explosion of TNT with different charge shape[J]. Chinese Journal of Explosives & Propellants, 2018, 41(5):461-464,500. (in Chinese)
[11]	徐维铮, 黄超, 张磐, 等. 锥形长药柱水下爆炸冲击波参数计算方法[J]. 爆炸与冲击, 2022, 42(1):014203.
	XU W Z, HUANG C, ZHANG P, et al. A method for calculating underwater explosion shock wave parameters of slender cone-shaped charges[J]. Explosion and Shock Waves, 2022, 42(1):014203. (in Chinese)
[12]	高祥涛. 切缝药包爆轰冲击动力学行为研究[D]. 北京: 中国矿业大学(北京),2013:84-90.
	GAO X T. Detonation shock dynamic behavior of split-tube charge holder[D]. Beijing: China University of Mining and Technology-Beijing, 2013:84-90. (in Chinese)
[13]	SHAN F, HE Y, JIAO J J, et al. Experimental and theoretical analysis of detonation products state on bubble dynamics and energy distribution in underwater explosion[J]. Journal of Applied Physics, 2021, 130 (17):174701.
[14]	安丰江, 吴成, 王宁飞. 圆柱装药在偏心定向起爆时水中近场压力特性[J]. 爆炸与冲击, 2011, 31(5):463-468.
	AN F J, WU C, WANG N F. Pressure characteristics in the near field of underwater explosion for cylindrical charge directed detonation[J]. Explosion and Shock Waves, 2011, 31(5):463-468. (in Chinese)
[15]	郭锐, 刘磊. 椭球罩作用下的水下爆炸冲击波反射聚焦模型[J]. 爆炸与冲击, 2018, 38(1):174-182.
	GUO R, LIU L. Modeling on the reflection and focusing process of the underwater explosion shock waves by an ellipsoidal reflector[J]. Explosion and Shock Waves, 2018, 38(1):174-182. (in Chinese)
[16]	林尚剑, 王金相, 马腾, 等. 水下多点爆炸冲击波叠加效应研究[J]. 兵工学报, 2020, 41(增刊1):39-45.
	LIN S J, WANG J X, MA T, et al. Superimposed effect of shock waves of underwater explosion[J]. Acta Armamentarii, 2020, 41(S1):39-45. (in Chinese)
[17]	程素秋, 秦健, 况贶, 等. 战斗部壳体对水下爆炸威力影响的数值模拟研究[J]. 兵工学报, 2015, 36(增刊1):115-121.
	CHENG S Q, QIN J, KUANG K, et al. Numerical simulation on influence of warhead shell on underwater explosion power[J]. Acta Armamentarii, 2015, 36(S1):115-121. (in Chinese)
[18]	ZHANG A M, WANG S P, HUANG C, et al. Influences of initial and boundary conditions on underwater explosion bubble dynamics[J]. European Journal of Mechanics-B/Fluids, 2013,42:69-91.
[19]	王海福, 何锁, 蔡轶强, 等. 活性复合射流侵彻多层间隔靶毁伤行为[J]. 兵工学报, 2023, 44(2):325-333. doi: 10.12382/bgxb.2021.0755
	WANG H F, HE S, CAI Y Q, et al. Damage behavior of multi-layer spaced target plates penetrated by reactive composite jet[J]. Acta Armamentarii, 2023, 44(2):325-333. (in Chinese) doi: 10.12382/bgxb.2021.0755
[20]	贾鑫, 黄正祥, 徐梦雯, 等. 聚能射流对厚壁移动靶的侵彻理论与数值模拟分析[J]. 兵工学报, 2019, 40(8):1553-1561. doi: 10.3969/j.issn.1000-1093.2019.08.001
	JIA X, HUANG Z X, XU M W, et al. Theoretical model and numerical study of shaped charge jet penetrating into thick moving target[J]. Acta Armamentarii, 2019, 40(8):1553-1561. (in Chinese) doi: 10.3969/j.issn.1000-1093.2019.08.001
[21]	范志强, 马宏昊, 沈兆武, 等. PVDF压力计在结构表面爆炸压力测量中的应用技术研究[J]. 兵工学报, 2014, 35(增刊2):27-32.
	FAN Z Q, MA H H, SHEN Z W, et al. Investigation on application of PVDF gauges in blast pressure measurement on structure surfaces[J]. Acta Armamentarii, 2014, 35(S2):27-32. (in Chinese)
[22]	张社荣, 李宏璧, 王高辉, 等. 水下爆炸冲击波数值模拟的网格尺寸确定方法[J]. 振动与冲击, 2015, 34(8):93-100.
	ZHANG S R, LI H B, WANG G H, et al. A method to determine mesh size in numerical simulation of shock wave of underwater explosion[J]. Journal of Vibration and Shock, 2015, 34(8):93-100. (in Chinese)
[23]	范志强, 常瀚林, 何天明, 等. 封装因素对PVDF压力计测量性能的影响[J]. 振动与冲击, 2023, 42(3):287-296.
	FAN Z Q, CHANG H L, HE T M, et al. Effects of packaging factors on measurement performance of PVDF pressure gauges[J]. Journal of Vibration and Shock, 2023, 42(3):287-296. (in Chinese)