Journal of Northeastern University(Natural Science) ›› 2025, Vol. 46 ›› Issue (1): 119-126.DOI: 10.12068/j.issn.1005-3026.2025.20230212

• Resources & Civil Engineering • Previous Articles    

Study on Overpressure and Disaster Distance of Wood Dust Explosion Based on TNT Equivalent Method

Hao-nan ZHANG, Qi YUAN, Chun-miao YUAN, Gang LI   

  1. School of Resources & Civil Engineering,Northeastern University,Shenyang 110819,China. Corresponding author:YUAN Chun-miao,professor,E-mail: yuanchunmiao@mail. neu. edu. cn
  • Received:2023-07-20 Online:2025-01-15 Published:2025-03-25

Abstract:

To quickly assess the overpressure and disaster distance of wood dust explosion, the TNT equivalent method was used to predict the overpressure value of wood dust explosion. The explosion pressure maximum of wood dust was simulated using ANSYS/LS-DYNA. The experimental results show that when the initial pressure is 0 MPa and the dust concentration is 750 g/m3, the error between simulated values and experimental values is within 10%; When the initial pressure is 0.101 MPa and the dust concentration is 730 g/m3, the error between the calculated value and the experimental value is 2.44%, the error between the simulated value and the experimental value is within 7%, and the error between the simulated value and the calculated value is within 8%. It proves that the TNT equivalent method is applicable for predicting the overpressure of wood dust explosion with or without standard atmospheric pressure. Based on the TNT equivalent method, the distribution of dust explosion overpressure in buildings was estimated, and the thresholds for casualties and building damage were analyzed. The research conclusion provides a reference basis for disaster prevention and mitigation measures such as the safe distance determination of hazardous areas for wood dust explosion.

Key words: TNT equivalent method, explosion overpressure, wood dust, ANSYS/LS-DYNA, safe distance

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