Application of link-interface technology in numerical testing of rescue cabin

While testing the strength of a rescue cabin under blasting, the door and other special structures of the underground coal mine rescue cabin are usually simplified to shorten the time of calculation. When the rescue cabin is attacked by blasting, the large deformation or failure frequently occurred in those structures. In order to simulate the dynamic response of these special structures without increasing the calculation time, a numerical method based on LS-DYNA named Link-Interface is studied. The cabin door and reinforced ribs are calculated in detail by this method. The results show that as the peak pressure of blast loading is 1.5 MPa, the largest deformation appears at the middle of cabin door, and its maximum displacement diminishes exponentially with pressure rise time. Circumferential ribs play more important role in reducing the surface displacement and increasing the strength of the cabin than axial ribs. The results can provide a certain theoretical basis for designing and testing an underground coal mine rescue cabin.