Numerical simulation of rescue cabin under blasting in the tunnel

Based on Hypermesh and LS-DYNA, the dynamic response of a rescue capsule of simple steel structure under blasting was simulated by numerical method. The maximum displacement on the cabin diminishes exponentially with the pressure rise time, and increases as the overpressure affecting time, the numerical simulation of detection can not ignore the effects of time-parameters. The maximum displacement of cabin unit decreases 3 mm while the thickness of circumferential ribs increass from 8 mm to 14 mm, and it decreases only 0.9 mm as the thickness of axial ribs increases from 8 mm to 14 mm. Circumferential ribs plays an important role on reducing surface displacement and increasing the strength of the cabin. Certain theoretical basis about designing and testing is provided by the results of numerical simulation.