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Mesh size effect in numerical simulation of blast wave propagation and interaction with structures

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Abstract

Numerical method is popular in analysing the blast wave propagation and interaction with structures. However, because of the extremely short duration of blast wave and energy transmission between different grids, the numerical results are sensitive to the finite element mesh size. Previous numerical simulations show that a mesh size acceptable to one blast scenario might not be proper for another case, even though the difference between the two scenarios is very small, indicating a simple numerical mesh size convergence test might not be enough to guarantee accurate numerical results. Therefore, both coarse mesh and fine mesh were used in different blast scenarios to investigate the mesh size effect on numerical results of blast wave propagation and interaction with structures. Based on the numerical results and their comparison with field test results and the design charts in TM5-1300, a numerical modification method was proposed to correct the influence of the mesh size on the simulated results. It can be easily used to improve the accuracy of the numerical results of blast wave propagation and blast loads on structures.

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Authors and Affiliations

  1. School of Civil Engineering, Tianjin University, Tianjin, 300072, China

    Yanchao Shi  (师燕超), Zhongxian Li  (李忠献) & Hong Hao  (郝 洪)

  2. School of Civil and Resource Engineering, The University of Western Australia, Crawley, WA, 6009, Australia

    Hong Hao  (郝 洪)

Authors
  1. Yanchao Shi  (师燕超)
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  2. Zhongxian Li  (李忠献)
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  3. Hong Hao  (郝 洪)
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Corresponding author

Correspondence to Zhongxian Li  (李忠献).

Additional information

Supported by National Natural Science Foundation of China (No.50638030, 50528808), the National Key Technologies R&D Program of China (No.2006BAJ13B02), and the Australian Research Council (No.DP0774061).

SHI Yanchao, born in 1982, male, doctorate student.

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Shi, Y., Li, Z. & Hao, H. Mesh size effect in numerical simulation of blast wave propagation and interaction with structures. Trans. Tianjin Univ. 14, 396–402 (2008). https://doi.org/10.1007/s12209-008-0068-9

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  • DOI: https://doi.org/10.1007/s12209-008-0068-9

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