Numerical simulation on shock critical initiation velocity of cylindrical covered charge by multiple fragment impacts

GUO Chun; GUO Shangsheng; QIAN Jianping; GU Wenbin

doi:10.11883/bzycj-2019-0391

Volume 40 Issue 6

Jun. 2020

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GUO Chun, GUO Shangsheng, QIAN Jianping, GU Wenbin. Numerical simulation on shock critical initiation velocity of cylindrical covered charge by multiple fragment impacts[J]. Explosion And Shock Waves, 2020, 40(6): 062301. doi: 10.11883/bzycj-2019-0391

Citation:

GUO Chun, GUO Shangsheng, QIAN Jianping, GU Wenbin. Numerical simulation on shock critical initiation velocity of cylindrical covered charge by multiple fragment impacts[J]. Explosion And Shock Waves, 2020, 40(6): 062301. doi: 10.11883/bzycj-2019-0391

Citation:

GUO Chun, GUO Shangsheng, QIAN Jianping, GU Wenbin. Numerical simulation on shock critical initiation velocity of cylindrical covered charge by multiple fragment impacts[J]. Explosion And Shock Waves, 2020, 40(6): 062301. doi: 10.11883/bzycj-2019-0391

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Numerical simulation on shock critical initiation velocity of cylindrical covered charge by multiple fragment impacts

doi: 10.11883/bzycj-2019-0391

GUO Chun^1
,,
GUO Shangsheng²,
QIAN Jianping^{1
,
,},
GU Wenbin^{1, 3}

1.
School of Mechanical Engineering, Nanjing University of Science and Technology, Nanjing 210094, Jiangsu, China
2.
Product R&D Center, Liaoshen Industries Group Co., Ltd., Shenyang 110045, Liaoning, China
3.
The Army Engineering University of PLA, Nanjing 210007, Jiangsu, China

Received Date: 2019-10-12
Rev Recd Date: 2020-03-05

Available Online: 2020-05-25

Publish Date: 2020-06-01

Abstract

Abstract

In order to investigate the shock initiation of missile warhead (cylindrical covered charge) by multiple tungsten spherical fragment impacts under actual combat circumstance, based on the analysis of single fragment impact, the numerical simulations were carried out by using AUTODYN-3D software. The influence on the shock initiation characteristics of different number, distance separation (impact angle θ and axial spherical center distance l), time separation were analyzed, and the critical initiation velocity of covered Comp B was obtained by the up-down method. The obtained simulation results show that, the critical initiation velocity decreases with the tungsten fragments number increase and the distance separation decrease. The critical initiation velocity of cylindrical covered charge impacted by six fragments synchronously is about 50% compare to the single fragment. The cylindrical covered charge is more difficult than plane covered charge to detonate by double fragments when the impact velocity below the critical velocity of a single fragment. The critical initiation velocity decreases initially and then increases with the increase of time separation when fragments impacting asynchronously on the cylindrical covered charge. The minimum critical initiation velocity of cylindrical covered charge impacted by double fragments synchronously is about 95% comparinge with that of impacted by double fragments asynchronously. For |θ₂|＜|θ₁| (θ₁ is the impact angle of the first fragment, θ₂ is the impact angle of the second fragment), the cylindrical covered charge is easy to detonate by double fragments asynchronously. The results provide the reference for cumulative damage assessment of cylindrical covered charge by multiple fragment impacts.
- cylindrical covered charge,
- multiple fragments,
- shock initiation,
- critical initiation velocity

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References(17)

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