Optimization of isolated protection for the hard-target penetration fuze

In the process of projectile penetrating hard targets, the fuze reliability may be reduced due to the stress abrupt change. Based on the stress wave propagation theory, a fuze force model was established, and the coupling action between impact load and fuze media was investigated. Moreover, the variation of impact load acting on the fuze was explored and a mathematical expression for the maximum value of stress abrupt change was deduced. On this basis, the influences of gasket thickness and gasket structure on the shock resistance performance of fuze was analysed by the method of theoretical analysis combined with software simulation. An optimum design scheme for fuze protection was proposed, which was achieved by adjusting the gasket thickness and modifying the structured gasket. Whereafter, the optimization scheme was verified by the recovery experiment on a mortar platform. The simulation and experiment results show that the optimization scheme is reasonable and feasible, which can effectively attenuate impact load and improve the fuze reliability.