【摘要】 针对弹丸侵彻硬目标过程中应力突变导致引信可靠性降低的问题,基于应力波传播理论,建立引信受力模型,研究冲击载荷与引信介质间的耦合动力特性,揭示引信受冲击载荷变化规律,推导出应力突变最大值关系式。在此基础上,采用理论分析结合软件仿真的方法,研究垫片厚度与垫片结构对引信抗冲击防护性能的影响,提出采用调整垫片厚度与结构化垫片相结合的引信防护优化设计方案,并基于迫炮试验平台进行回收试验验证。结果表明,该优化方案合理可行,能有效衰减冲击载荷,提高侵彻引信的工作可靠性。更多还原

【Abstract】 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.更多还原