约束空间内壳装炸药殉爆及防护

To investigate the sympathetic detonation (SD) response and protection method of shell explosive in the packaging box, the sympathetic detonation experiment of JHL-2 (RDX/Al/binder = 65.5/30/4.5) explosive charges in the packaging box was carried out. The response of the acceptor charges was characterized by the residual of explosive and the breakage of the shell. A calculation model for the sympathetic detonation of shell explosives in packaging box is established, and the numerical simulation of the sympathetic detonation experiment is carried out by using the nonlinear finite element method. The calculation model is verified to be reliable according to the test results. The results of the simulation study show that the main cause for SD of charges in packaging box is the impact of high-speed fragments. According to the experiment result, simulation result and the fragmentation impact initiation criteria of explosive charge, the anti-sympathetic detonation design is implemented for the packaging box. The anti-sympathetic detonation design considering weight and price is as follows: 20 mm wooden partition is set in the adjacent explosive charge, and 2 mm aluminum partition is set on the bottom of the packaging box. A new sympathetic detonation experiment was performed with anti-sympathetic detonation modifications on the packaging box included. The results show that under the unprotected condition, two acceptor charges in the same packaging box with the donor charge and one acceptor charge in the packaging box below the donor charge detonated, and one acceptor charge in the lower packaging box didn’t react; when 20 mm wooden partition was set between adjacent charges and a 2 mm aluminum plate was set on the bottom of the packaging box, only one of the acceptor charges adjacent to the donor charge had a reaction from deflagration to explosion level, and the other three acceptor charges did not react. The research result proves that the installation of partitions inside the packaging box can effectively reduce the possibility of sympathetic detonation, so as to avoid the disastrous consequences caused by sympathetic detonation.