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Journal of Projectiles, Rockets, Missiles and Guidance >

2023 , Vol. 43 >Issue 1: 77 - 84

DOI: https://doi.org/10.15892/j.cnki.djzdxb.2023.01.011

Numerical Simulation of Underground Structure Penetration and Explosion Based on SPH-FEM Method

  • ZHANG Wentang 1 ,
  • SUN Huixiang 1 ,
  • YUAN Yingjie 2 ,
  • SUN Huiying 3 ,
  • KANG Ting 1
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  • 1 Aeronautics Engineering College, Air Force Engineering University, Xi’an 710038, Shaanxi, China
  • 2 No.95455 Unit, Dali 672100, Yunnan, China
  • 3 Zhongtian Northwest Construction Group Co.,Ltd., Xi’an 710077, Shaanxi, China

Received date: 2022-07-20

  Online published: 2025-02-01

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Abstract

In order to improve the survivability of underground protection engineering, it is necessary to accurately consider the damage to the structure caused by the continuous action of penetration and explosion. Through the SPH-FEM coupled numerical simulation method, the simulation of the entire process of penetration and explosion of underground structures is realized, which solves the simulation problem of high intensity and large deformation in the vicinity of the invasion and explosion by the traditional finite element method. According to the empirical formula, the validity of the model is verified. The results show that the penetration projectile has a sealing effect on the rock mass, which enhances the damage effect. SPH algorithm compensates for the penetration hole unloading defect of the erosion algorithm for the penetration explosion process, and more accurately simulates the joint effect of penetration explosion; pouring separately from the straight wall can reduce structural damage; In addition to arch feet, the vault and spandrel are the weak parts of the straight wall arch structure under the action of penetration explosion. The research results can provide a basis for the design of underground protective structures.

Key words： underground protective structure; penetration explosion; SPH-FEM method; numerical simulation; seal role

Cite this article

ZHANG Wentang , SUN Huixiang , YUAN Yingjie , SUN Huiying , KANG Ting . Numerical Simulation of Underground Structure Penetration and Explosion Based on SPH-FEM Method[J]. Journal of Projectiles, Rockets, Missiles and Guidance, 2023 , 43(1) : 77 -84 . DOI: 10.15892/j.cnki.djzdxb.2023.01.011

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