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NUMERICAL SIMULATION ANALYSIS ON PROPAGATION VELOCITY LAW OF INTERNAL EXPLOSION BLAST WAVE AT THE TUNNEL ENTRANCE

Ren Xin-jian

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Abstract

The accurate calculation of shock wave propagation velocity changes caused by internal explosion at the tunnel entrance is critical for the time response index of wave absorption facilities in the tunnel.Therefore,five internal explosion calculations in different conditions have been conducted based on AutoDyn,and engineering experience model of shock wave propagation velocity has been constructed by using dimensional analysis and its coefficient has been determined through the fitting of numerical results.Compared with results of the tunnel chemical explosion experiment,the results showed that the maximum error being 15%,thus indicated that this model as an engineering method is quite applicable.

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What this paper is about

The accurate calculation of shock wave propagation velocity changes caused by internal explosion at the tunnel entrance is critical for the time response index of wave absorption facilities in the tunnel.Therefore,five internal explosion calculations in different conditions have been conducted based on AutoDyn,and engineering experience model of shock wave propagation velocity has been constructed by using dimensional analysis and its coefficient has been determined through the fitting of numerical results.Compared with results of the tunnel chemical explosion experiment,the results showed that the maximum error being 15%,thus indicated that this model as an engineering method is quite applicable.

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Available abstract

The accurate calculation of shock wave propagation velocity changes caused by internal explosion at the tunnel entrance is critical for the time response index of wave absorption facilities in the tunnel.Therefore,five internal explosion calculations in different conditions have been conducted based on AutoDyn,and engineering experience model of shock wave propagation velocity has been constructed by using dimensional analysis and its coefficient has been determined through the fitting of numerical results.Compared with results of the tunnel chemical explosion experiment,the results showed that the maximum error being 15%,thus indicated that this model as an engineering method is quite applicable.

Key concepts: Shock wave, Rock blasting, Computer simulation, Blast wave, Shock (circulatory), Engineering, Mechanics, Wave velocity

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NUMERICAL SIMULATION ANALYSIS ON PROPAGATION VELOCITY LAW OF INTERNAL EXPLOSION BLAST WAVE AT THE TUNNEL ENTRANCE — Research Paper | ScholarLens