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Volume 29 Issue 4
 
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Article Navigation >  Journal of Unmanned Undersea Systems  > 2021  >  29(4): 471-476
HUANG Hong, LU Xi, WANG Jian. Near Field Shock Wave Numerical Simulation of Cylindrical Charge Underwater Explosion[J]. Journal of Unmanned Undersea Systems, 2021, 29(4): 471-476. doi: 10.11993/j.issn.2096-3920.2021.04.015
Citation: HUANG Hong, LU Xi, WANG Jian. Near Field Shock Wave Numerical Simulation of Cylindrical Charge Underwater Explosion[J]. Journal of Unmanned Undersea Systems, 2021, 29(4): 471-476. doi: 10.11993/j.issn.2096-3920.2021.04.015
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Near Field Shock Wave Numerical Simulation of Cylindrical Charge Underwater Explosion

doi: 10.11993/j.issn.2096-3920.2021.04.015

  • Department of Equipment Engineering, Shenyang Ligong University , Shenyang 110159, China

  • Received Date: 2020-09-04
  • Rev Recd Date: 2020-10-10
  • Publish Date: 2021-08-31
    Abstract
  • Cylindrical charge, which is a common charge structure for an underwater explosion, is mainly used in far-field underwater explosions. However, there is little research on the near-field shock wave. In order to obtain the parameters related to the forward near-field shock wave power of conventional cylindrical charge underwater explosion, the near-field shock wave power field with the vertical distance of the front-end cylindrical charge x and horizontal distance y is established. In this paper, the underwater explosion process of TNT spherical charge based on equal charge and cylindrical charge, whose ratio of length to diameter ranges from 1.1~2, is simulated using the AUTODYN simulation software. The near-field shock wave attenuation law of cylindrical charge underwater explosion is analyzed. By combining the Cole empirical formula, the simulation value of the cylindrical charge is optimized, and an empirical formula for the forward near-field shock wave pressure peak of cylindrical charge is obtained through logistic regression. The average error of pressure peak is approximately 5%, validating the accuracy of this formula. The research results can be used for the calculation of the near field power assuming a cylindrical charge underwater explosion.

     

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