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针对记录仪在高强度、高速撞击挤压等恶劣环境下出现损坏的现象,为了防止弹载记录仪的外壳被挤压变形,对记录仪的机械结构设计进行了优化改进。将记录仪外壳材料由优化前的45#钢更换为高强度钢35Cr Mn Si A,并将靠近内层保护壳的外壳壁厚由8mm增加到17mm,内层核心电路保护壳也采用高强度钢35Cr Mn Si A,壳体内部采用环氧树脂灌封。通过ANSYS/LS-DYNA软件仿真计算,结合高冲击下能量吸收理论分析得出:优化改进前和改进后外壳所能承受的极限强度分别为1.490GPa和4.973GPa;外壳吸收能量与整体吸收能量的比值由58.63%提高到75.52%。由此证明该方案是可行的,能够防止记录仪在配重模块质量为20kg、初速度为200m/s的高强度撞击下出现外壳破损,能够很好地保护记录仪核心模块。本文结果对弹上产品的机械结构设计以及核心电路保护具有一定的参考价值。
In view of the phenomenon of recorder damaging in harsh environments such as high-intensity, high-speed impact and squeezing, in order to prevent the housing of the missile recorder from being crushed and deformed, the mechanical structure design of the recorder is optimized and improved. The recorder housing material from the optimization of the 45 # steel to high-strength steel 35Cr Mn Si A, and will close the inner shell of the shell thickness increased from 8mm to 17mm, the inner core of the circuit protection shell also uses high-strength steel 35Cr Mn Si A, epoxy resin encapsulation inside the housing. Through ANSYS / LS-DYNA software simulation and theoretical analysis of energy absorption under high impact, the ultimate strength of the shell before and after the optimization is 1.490GPa and 4.973GPa respectively. The absorption energy of the shell and the total absorbed energy Ratio increased from 58.63% to 75.52%. This proves that the scheme is feasible and can prevent the recorder from damaging the housing under the impact of high intensity with a mass of the weighting module of 20kg and an initial velocity of 200m / s, which can well protect the core module of the recorder. The result of this paper is of certain reference value to the mechanical structure design and core circuit protection of the product on the bomb.