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针对弹载测控装置因承受高g值冲击而发生失效的问题,将不同厚度铝壳和不同密度的泡沫铝填充结构用于其缓冲保护,采用含有偏心率因子的直链塑性铰模型分析了铝壳在轴向高g值冲击加速度作用下的压溃特性,通过ANSYS/LS-DYNA有限元软件模拟了结构在轴向冲击下的动力屈曲行为,讨论了铝壳厚度以及泡沫铝密度对泡沫铝填充铝壳结构力学性能的影响。仿真结果表明:在铝壳内填充泡沫铝,提高了结构的平均压溃力,改善了轴向压溃载荷波形。铝壳的偏心率因子不随铝壳厚度变化而变化。
Aiming at the failure of the on-board measurement and control device due to the high g-value impact, the aluminum foil with different thickness and different density was used for its cushioning protection. The linear plastic hinge model with eccentricity factor was used to analyze the aluminum The dynamic buckling behavior of the shell under axial impact was simulated by ANSYS / LS-DYNA finite element software. The effects of aluminum shell thickness and aluminum foam density on the properties of aluminum foam Influence of Mechanical Properties of Aluminum Filled Structure. The simulation results show that the aluminum foam filled aluminum foam to improve the structure of the average crushing force and improve the axial crush load waveform. The eccentricity factor of the aluminum shell does not change with the thickness of the aluminum shell.