EXPERIMENTAL AND NUMERICAL STUDY OF TUNNEL VARIATIONS EFFECTS ON BLAST WAVE TRANSMISSION MECHANISM

Cheng-Wei  Hung; Sheng-Jung Pi; Pen-Chou Chen

doi:10.5937/jaes0-62333

Cheng-Wei Hung Minghsin University of Science and Technology, Department of Civil Engineering and Environmental Informatics, Taiwan https://orcid.org/0000-0003-1243-7333
Sheng-Jung Pi National Defense University, Chung Cheng Institute of Technology, School of National Defense Science, Taiwan https://orcid.org/0009-0007-6440-2876
Pen-Chou Chen National Chung Hsing University, College of Engineering, Department of Civil Engineering, Taichung, Taiwan https://orcid.org/0000-0002-5760-4521

DOI: https://doi.org/10.5937/jaes0-62333

Keywords: blast wave transmission, tunnel geometry, near-field explosion, fluid–structure interaction, ALE method, experimental and numerical analysis

Abstract

This study investigates the effects of tunnel configuration changes on blast pressure transmission under near-field explosion conditions using both experimental and numerical approaches. Small-scale models were employed to conduct explosion tests, including near-surface detonations and variations in tunnel patterns. Numerical simulations utilizing ALE (Arbitrary Lagrangian-Eulerian) fluid-structure interaction were performed to evaluate blast pressure transmission. The analysis revealed that elbow-type, T-type, and branched tunnels exhibited varying effects on blast pressure transmission, with significant differences in pressure between the inner and outer walls of the tunnels' bend sections. In elbow-type tunnels, the inner wall experienced greater blast pressure than the outer wall, whereas the opposite was observed in T-type and branched tunnels. The findings demonstrate that the numerical model accurately reflects experimental blast pressure transmission patterns.

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