NUMERICAL SIMULATION OF BLAST PRESSURE ON ACCESS BLAST DOOR USING ABAQUS SOFTWARE

Abstract

This article presents the investigation results of reflected blast pressure acting on access blast doors using a numerical simulation method with Abaqus software. The study employs Sadovskii's empirical formula as the theoretical basis for determining shock wave overpressure. Simulations were conducted with parametric variations including: TNT explosive mass ranging from 50 kg to 200 kg, standoff distance from explosion center to protective door (R₀) from 10m to 25m, and incident angle α between shock wave propagation direction and door surface normal from 0° to 60°, under the assumption that the protective door is perfectly rigid and immobile. Results show that the error between Abaqus simulation and empirical formula ranges from 1.123% to 13.65%, demonstrating high reliability of the simulation method. Reflected pressure decreases with increasing standoff distance R₀ and varies complexly with angle α due to the curved surface characteristics of the protective door. The study confirms that Abaqus software is an effective tool for predicting and analyzing blast pressure on protective door structures, contributing to improved efficiency and safety in the design and construction of access tunnel protective doors in practice. Moreover, the influence of the curvature radius of the door surface on the reflected pressure value is complex. When calculating the load acting on the protective door, it is necessary to consider the average reflected pressure on the curved surface to ensure accurate calculations.