自动机缓冲结构在后坐行程中的反应特性分析

Analysis of Response Characteristics of Buffer Structure of Automatic Gun in Recoil Stroke

自动机在后坐过程中,缓冲结构对冲击载荷的反应特性直接影响到系统安全;对缓冲结构进行动力学建模,通过数值模拟评估其反应特性,优化其参数.更好地匹配自动机使用环境;数值模拟对自动机实际工况的逼近程度直接影响评估的准确性;通过对自动机缓冲结构全载荷语分析,考虑到自动机后坐、复进、前冲、返回四个阶段的受力方向变化,准确构建自动机数学模型,对于膛压的时变规律(p-t曲线)、沿程变化(p-l曲线)、弹丸速度的时变规律(v-t曲线)及沿程变化(v-l曲线)进行了仿真计算,进而对后坐阻力的时变规律进行数值模拟,并把模拟结果与实际试验结果进行对比分析,结果表明,数值模拟与试验数据较为吻合,这对自动机缓冲结构的设计具有参考意义。

In the recoil process of automatic gun,the response characteristics of the buffer structure to the impact load directly affect system safety.The dynamic model of the buffer structure is established,and its response characteristics are evaluated by numerical simulation.The parameters are optimized to better match the use environment of the automatie gun Through the full load spectrum analysis of the buffer structure of the automatic gun,considering the variation in the force direction during the four stages of the automatic gun(i.e.recoil,re-entry,forward impact and returm)the mathematical model of the automatic gun is accurately constructed,and the variation of the chamber pressure(P-T curve),the variation along the path(P-L curve),the variation of the projectile velocity(V-T curve)and the variation along the path(v-l curve)are simulated.Then,the variation of recoil resistance is numerically simulated.The simulation results and the actual test results are consistent,which indicates reference value for the design of buffer structure of automatic gun.