舰炮检验弹由于结构不同于实弹，入膛时反弹速度过大，造成相关零部件断裂和关闩故障。故设计采用差动胶泥缓冲器吸收过大的动能以保证检验弹的入膛可靠性。为评估差动胶泥缓冲器在检验弹上的缓冲效能，以及分析检验弹的入膛运动规律，提出一种结合缓冲器流体数值分析（computational fluid dynamics，CFD）和入膛多体动力学分析(multi-body dynamic，MBD)的仿真分析方法。计算结果表明：此方法能够准确计算和预测缓冲器的缓冲效能，检验弹的缓冲器满足设计技术要求；静压过程在活塞后方形成多个涡旋，而冲击过程流线平稳无涡旋；黏性阻抗分力随压缩速率降低先增大后减小。研究不仅为胶泥缓冲器在舰炮检验弹上的应用提供理论支撑，还为胶泥缓冲器本身的研究提供新的分析方法。
Abstract
Because the structure of naval gun test projectile is different from that of the real projectile, its rebound speed is excessively high when loading in bore to cause the fracture of related parts and latch failure. Here, a differential clay buffer was designed to absorb excessive kinetic energy to ensure the reliability of the test projectile. In order to evaluate the buffering efficiency of differential mastic buffer on the test projectile and analyze the projectile loading motion law, a simulation analysis method combining buffer fluid numerical analysis with computational fluid dynamics (CFD) and multi-body dynamic analysis (MBD) was proposed. The computation results showed that the proposed method can accurately compute and predict the buffer efficiency of the buffer, and the buffer meets design technical requirements; in process of static pressure, multiple vortices are formed behind piston, while in process of impact, streamline is stable without vortices; the viscous impedance component increases firstly and then decreases with decrease in compression rate; the study can not only provide a theoretical support for application of clay buffer in naval gun test projectile, but also provide a new analysis method for studying clay buffer.
关键词
舰炮 /
差动 /
胶泥缓冲器 /
计算流体动力学(CFD) /
仿真
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Key words
naval gun /
differential /
clay damper /
computational fluid dynamics (CFD) /
simulation
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