摘要
根据水下火箭弹使用环境,易出现低速大着角碰撞,此时弹体轴向加速度与弹道水流阻力下加速度大小会较为接近,导致发引信误发火问题,但未见相关研究成果发表。针对水下火箭弹弹道和碰撞时的加速度特点问题,运用ANSYS 14.0中的LS DYNA和FLUENT模块进行了仿真分析,结果表明在低速大倾角碰撞时轴向加速度信号小于弹道上的最大加速度信号,但此时弹体法向加速度差别较明显。根据仿真结果特点提出了一种加速度触发复合的发火控制方法,分析表明该软件仿真方法成熟、结果可信度较高,数据中存在的问题有合理的解释,该方法可以实现水下火箭弹碰撞信号和弹道信号的区别,且准确度较高,可以在设计中应用。
In the operating environment, underwater rockets are prone to low-speed large angle-of-fall collisions. At this time the rocket body axial acceleration is close to the ballistic flow resistance acceleration, which leads to fuze false ignition. However, no relevant research has been published. In this paper, the ballistic and collision process of underwater rockets were simulated by LS-DYNA and FLUENT of ANSYS 14.0 for the acceleration characteristics. The results show that the low-speed col- lision axial acceleration is less than ballistic maximum acceleration, but the differences of the rocket body normal acceleration between these two situations are obvious. An acceleration-triggered composite detonation control method was presented based on the simulation results. The analysis shows that the simulation method is mature and highly reliable, and the problems existing in the data have reasonable explanation. The detonation control method can recognize the underwater rocket＇s collision signal and ballistic signal, and has high accuracy and can be applied in the design.
出处
《现代电子技术》
2013年第3期8-11,共4页
Modern Electronics Technique
基金
十二五"兵器支撑项目(62201040603)
江苏省普通高校研究生科研创新计划资助项目(CXZZ11_0269)
关键词
水下火箭弹
引信
大着角碰撞
数值仿真
underwater rocket
fuze
large angle-of-fall collision
numerical simulation
