자폭신관의 자폭시간 연장 및 최적화 연구

Abstract

A point-detonating self-destruct (PD-SD) fuze equipped with a shell is a mechanical fuze designed to initiate the main charge upon target impact and self-destruct over a regular distance if the impact fails to prevent the risk associated with a blind shell. By adjusting the component requirements without altering the shell’s configuration, the self-destruct time can be prolonged, which consequently increases the effective range within the maximum range limit. This study focuses on modifying and optimizing the component requirements of a PD-SD fuze to prolong its self-destruct time and increase its effective range. Initially, the operational principle of an impact-initiated, self-destruct fuze is analyzed. The self-destruct timing appear to be governed by the kinetics of an inertia ball, which is affected by the angular velocity of the projectile. A theoretical review of the mechanical kinetics of the inertia ball confirms that the spring load and inclination angle of the housing, which guide the trajectory of the ball, are critical parameters affecting the self-destruct time. Subsequently, existing flight [firing] test data are utilized to derive the parameters for application in theoretical calculations. The PRODAS program is employed to compute the variations in the self-destruct time by iteratively modifying the spring load and inclination angle. The results of these theoretical computations are validated experimentally using an Oerlikon test device in a laboratory, which guides the selection of optimal design conditions for the spring load and housing inclination angle. Acknowledging the inherent disparity between limited laboratory test conditions and actual firing environments, the factorial-design method, which is a design-of-experiments approach, is designed using Minitab. This design provides guidance for subsequent live firing tests to ascertain and optimize the improved self-destruct time under realistic operational conditions. The effectiveness of the derived optimization is empirically verified through two distinct firing trials. Based on the results of this study, the optimal self-destruct time is 17.6 s, which extends the effective range by approximately 41% compared with that afforded by the existing self-destruct time requirement.