Mechanical parameters of the overwhelm process of fluted liner for 30 mm rifled gun based on SPH method

WANG Xiaofeng; TAO Gang; REN Baoxiang; PANG Chunqiao; FAN Qiang; LIU Long

doi:10.11883/bzycj-2017-0291

Volume 39 Issue 1

Oct. 2018

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WANG Xiaofeng, TAO Gang, REN Baoxiang, PANG Chunqiao, FAN Qiang, LIU Long. Mechanical parameters of the overwhelm process of fluted liner for 30 mm rifled gun based on SPH method[J]. Explosion And Shock Waves, 2019, 39(1): 012201. doi: 10.11883/bzycj-2017-0291

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Mechanical parameters of the overwhelm process of fluted liner for 30 mm rifled gun based on SPH method

doi: 10.11883/bzycj-2017-0291

1.
School of Energy and Power Engineering, Nanjing University of Science and Technology, Nanjing 210094, Jiangsu, China
2.
Chongqing Chang'an Industry(Group) Limited Liability Company, Chongqing 401120, China

Received Date: 2017-08-06
Rev Recd Date: 2018-03-05
Publish Date: 2019-01-05

Abstract

Abstract

In order to study the effect of high rotation on the shell-penetration of 30 mm shaped charge and the mechanism of spin-compensation, we simulated the overwhelm process of the fluted liner for the 30 mm rifle gun using the SPH method of LS-DYNA finite element software, and found that the actual movement of particles can be decomposed into centripetal motion and tangential motion around the center circle. We then put forward the four stages of the overwhelm process, those of the early crush, the buffer, the particle velocity increase in the fluted liner area and the central particle interaction. The jet forming layer rotates in a counterclockwise direction, whereas the material forming the pestle body rotates in the opposite direction. The results show that the special design of the fluted liner can compensate the negative impact of the rotating disturbance on the penetration effect of the 30 mm shaped charge. The compensating rotating speed of the projectile is 379 r/s and larger.
- SPH method,
- shaped charge,
- fluted liner,
- spin-compensation,
- overwhelm process,
- rotating speed

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References

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