Numerical Simulation and Parametric Analysis of High-Pressure Gas-Driven Shock Tube

It has great importance for the blast-resistant design of the structures to study the dynamic response and damage failure of structural components under explosion loads. This work focused on analyzing the influences of the shock tube’s parameters on the loads at the end of the driven section. Based on the ANSYS/LS-DYNA, the numerical simulation of the shock tube is conducted. The accuracy of the finite element model, parameters values, and the numerical simulation method are verified by comparing the numerical simulation results, such as overpressure-time histories and the deflection response of the reinforced concrete slabs, with the experimental results. Furthermore, a shock tube with a size of 3 m×3 m at the end of the driven section is designed. The influences of the shock tube’s geometric parameters and its inner overpressure on the loads at the end of the driven section are analyzed. The results show that the peak overpressure and positive time duration increased with the increase of the length, diameter, and pressure of the driver section. The results also show that the peak overpressure and positive time duration increased with the decrease of the angle of the expansion section. Finally, the design method of the shock tube based on peak overpressure and positive time duration is given, which was verified by the designed examples.