Analysis of shock wave pressure in tunnels with variable cross-section using Ansys Autodyn 3D software

In the study of the effects of explosions, including bomb detonations, the analysis of shock wave propagation within tunnels is of critical importance. As shock waves traverse tunnel sections with varying cross-sectional geometries whether expanding or contracting the pressure distribution undergoes significant changes. This paper systematically investigates the distribution of shock wave pressure in tunnels and regions with cross-sectional variations through numerical simulations conducted using ANSYS Autodyn 3D software. The obtained simulation results are compared with calculations derived from empirical formulas. Numerical analyses reveal that the discrepancy between the two approaches ranges from 3% to 33%, which is considered an acceptable margin of error in the study of shock wave propagation.