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Journal of Projectiles, Rockets, Missiles and Guidance >

2023 , Vol. 43 >Issue 1: 8 - 15

DOI: https://doi.org/10.15892/j.cnki.djzdxb.2023.01.002

Influence of Sand Land on Near-earth Detonation Wave of Cylindrical Charge

  • WU Hao 1, 2 ,
  • WU Guodong 1 ,
  • WANG Zhenning 1 ,
  • WANG Hao 1, 2 ,
  • MA Likang 3
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  • 1 School of Mechatronics Engineering,North University of China,Taiyuan 030051,Shanxi, China
  • 2 Science and Technology on Transient Impact Laboratory,Beijing 102202,China
  • 3 Jinxi Industrial Group Co., Ltd.,Taiyuan 030027,Shanxi,China

Received date: 2022-06-13

  Online published: 2025-02-01

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Abstract

In order to study the influence of sandy land on the shock wave propagation of cylindrical charge, AUTODYN-2D was used to numerically simulate the explosion of cylindrical charge with different burst heights and different incident angles on rigid ground and sand ground near the ground. By comparing the numerical simulation of the vertical ground with different burst heights, it is found that when the explosion height is less than 0.5 m, the pits on the sand soil ground will form aggregation effect on the shock wave, which makes the peak overpressure of the sand soil ground attachment greater than that the rigid ground. When the burst height is greater than 0.5 m, the energy absorption effect of sand soil ground occupies the main factor, so that the peak overpressure of rigid ground accessories is greater than that of sand soil ground, and the average attenuation rate of peak overpressure of sand soil ground is about 20% compared with that of rigid ground. And due to the soft characteristics of sandy soil ground, it will increase the positive pressure time, and the positive pressure time increases by at least 0.6 ms. By comparing the numerical simulation of different azimuth angles of the charge, the peak overpressure on both sides of the charge is significantly different when the azimuth angle is 0°~90°. When the azimuth angle is 0°, the peak overpressure on both sides of the charge is larger, and the damage effect is better.

Key words： shock wave; peak overpressure; positive pressure action time; Mach wave; numerical simulation

Cite this article

WU Hao , WU Guodong , WANG Zhenning , WANG Hao , MA Likang . Influence of Sand Land on Near-earth Detonation Wave of Cylindrical Charge[J]. Journal of Projectiles, Rockets, Missiles and Guidance, 2023 , 43(1) : 8 -15 . DOI: 10.15892/j.cnki.djzdxb.2023.01.002

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