Numerical simulation of applying shaped charge cutting technology to Explosive Switch

摘要

Existing Explosive Switches available on market have the shortcomings of high production costs and low work reliability. In view of this, the authors put forward a new structure of Explosive Switch by applying the shaped charge cutting technology. Firstly, by using multi-material ALE Finite Element Method and penalty function method of ANSYS/LS-DYNA explicit procedure to achieve fluid-solid coupling, the authors succeed in representing the dynamic process of the formation of shaped charge jet after the charge is ignited, the subsequent breaking-up of electrical conductors, and the final taking shape. Correspondingly, the time needed for the whole process is obtained. After this, the authors carry out experimental study, with special emphasis laid on testing cut-off time of Explosive Switch. Numerical simulation results agree perfectly with experimental results, indicating that the new Explosive Switch can accurately take shape within a specified time, and predicting that the shaped charge cutting technology can be successfully applied to Explosive Switch, which points a direction to the research of Explosive Switch with regard to working reliability and cost savings.