Experimental study and numerical simulation of gas blast shock loading

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Journal of Vibration and Shock ›› 2015, Vol. 34 ›› Issue (10) : 142-146.

ZHANG Xiu-hua1,2，DUAN Zhong-dong2，LI Yu-shun3

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Abstract

Based on a large nuclear explosion simulator—Gas Blast Shock (GBS) loading system, acetylene-air flammable gas explosion experiment is performed .The feasibility is explored by using acetylene-air gaseous mixture as an explosive source to perform the anti-explosion experiment of structures. Through the blast pressure time-history curves are analyzed, laws of the blast loading on structure under gas explosion are studied. The propagation processes of gas explosion shock wave are simulated using finite element program LS-DYNA. The numerical calculation results are compared with the experiment results, and the calculating results of peak pressure are in good agreement with the experiment results. The results show that the explosion shock wave pressure is the biggest when acetylene concentration reaches 9.45%. The positive reflection overpressure peak value on the inner wall of the large nuclear explosion simulator can reach 0.815MPa. The results can provide the basis that explosion shock experiment loading control is carried out by acetylene-air gaseous mixture.

Key words

mechanics of explosion / gas blast shock loading / propagation law / explosion experiment / numerical simulation

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ZHANG Xiu-hua1,2，DUAN Zhong-dong2，LI Yu-shun3. Experimental study and numerical simulation of gas blast shock loading[J]. Journal of Vibration and Shock, 2015, 34(10): 142-146

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