Finite element numerical analysis and experimental verification of anti explosion performance of inclined explosion proof wall

DOI:	10.11809/bqzbgcxb2024.07.009
Keywords:	inclined explosion proof wall; 70° explosion proof wall; antiknock performance; numerical analysis; ground explosion; shock wave pressure
Abstract:	The anti explosion performance of inclined explosion proof wall was studied by numerical simulation and experimental research. Firstly, the finite element numerical analysis model of different inclined explosion proof walls was established based on LS DYNA software, and the influence of different inclined angles on the propagation law of explosion shock wave and the peak pressure of explosion shock reflection wave and diffraction wave behind the wall was analyzed. Finally, 70° inclined explosion proof wall was selected as a typical inclined explosion proof wall to carry out experimental research. The numerical analysis results show that for every 10° reduction in the inclination angle of the explosion proof wall, the time for the explosion shock wave to reach the vertical explosion proof wall under the same explosion distance is extended by 0.1~0.5 ms, and the peak value of the reflected pressure on the front explosion surface is reduced by 0.5~1MPa. The experiment shows that the measured time history curve of the reflected pressure of the explosion shock wave on the 70° inclined explosion proof wall is basically consistent with the numerical simulation time history curve when the 5 kg pellet explodes. The maximum reflected pressure peak on the detonation surface is 2.04 MPa, and the measured wave attenuation coefficient is 80.6%, which is 13.7% higher than the numerical simulation value. The 70° inclined explosion proof wall can block the cumulative explosion impact of 3 times with 5kg drug ball spacing of 2 m.
Published:	2024-07-26
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