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数值研究锥段角度与高度及膜片厚度这3个典型结构特征对顶部凹陷锥柱形膜片翻转行为的影响,得出膜片在不同情况下的翻转效率及屈曲与后屈曲状态。分析结果表明:膜片屈曲载荷随锥段角度与高度的增加而呈线性化减小趋势,随膜片厚度增加呈指数化增长趋势;膜片翻转效率随锥段角度与膜片厚度增加而增加,随锥段高度增加而显著降低;膜片后屈曲阶段均出现平台效应,翻转比较稳定,仅锥段高度大于80 mm时波动显著;大锥段高度膜片翻转过程中易出现折叠、坍塌等严重失效情况。
The influence of cone angle and height and diaphragm thickness on the turnover behavior of the top hollow cylindrical cone was studied numerically. The turnover efficiency, flexion and post-buckling of the diaphragm under different conditions were obtained. The analysis results show that the buckling load decreases linearly with the increase of the cone angle and height, and increases exponentially with the increase of the thickness of the diaphragm. The turnover efficiency of the diaphragm increases with the increase of the cone angle and the thickness of the diaphragm , With the cone height increases and significantly reduced; plate post-buckling stage appeared platform effect, flip relatively stable, only when the cone section height greater than 80 mm, significant fluctuations; large cone section of the membrane prone to collapse during collapse, collapse, etc. Serious failure situation.