The Analysis Of Dynamics Response Of The Blindage Gate Under Explosive Impact

With the development of the world situation, many countries enhance their condition to blindage vitality, more and more attentions have been paid to the ability of blindage anti-explosive. In the course of blindage design, some methods have been introduced to improve the ability of blindage anti-explosive. The methods used in the design of blindage, such as changing the form of panels frame, instalingl local safety establishment, employing high quality steel and some other high strength material, had improved the battle effectiveness of the blindages.The finite element method is used in the practice of simulating the wreck condition and impact condition of the designing blindage and researching the method to improve the blindage vitality.The damage of blindage door under contact explosion is studied mainly in this paper. The major research areas of blindage door damage under contact explosion include four sectors, namely, (1) the characteristics of fluid field disturbed by a contact explosion and loadings of contact explosion; (2) the analysis of transient fluid-structure interactions, and the corresponding dynamic responses of the blindage door; (3) propagation of shock wave in the structure; (4) the dynamical plastic deformation response and damage analysis of blindage door subjected to contact explosion.Detonation products and blast shock wave destroy the blindage door together in conditions of contact explosion. Primary theories of detonation wave and plane shock wave are introduced. Approximately calculation formulation, calculational methods of initial parameters under the contact explosion and equation of solid status under shock wave are presented. The necessary preparation is done for the analysis of blindage door damage under contact explosion.The blindage door is mainly made up of girder and plate. The dynamic response of the board under contact explosion is emphasis of the vitality of blindage door. Dynamic response of the blindage door under the missile explosion was analyzed based on the ANSYS/LS-DYNA software, thecalculation gets the preferable emulate results, which can provide the foundation for blindage door's anti-explosive design.