摘要
大型真空球罐的承压方式为承受均布外压,其主要失效模式为薄壳屈曲失稳。以容积为18000m~3的大型真空球罐为例,对比分析了标准法、公式法和有限元法在计算真空球罐极限外压时的差别,并利用ANSYS有限元分析软件计算了含加强筋结构大型真空球罐的屈曲极限外压。从分析结果可以看出,加强筋结构可以有效提高大型真空球罐的抗失稳能力。
The pressure mode of large vacuum spherical tanks is to withstand the uniform external pressure,and the main failure mode is the thin shell buckling instability. Taking the large vacuum spherical tank with capacity of 18 000 m3 as an example, the difference between the standard method, the formula method and the finite element method in calculating the ultimate external pressure of the vacuum spherical tank were compared and analyzed.The finite element analysis software ANSYS was used to calculate the buckling ultimate external pressure of large vacuum spherical tank with reinforced structure. It could be seen from the analysis results that the reinforced structure could effectively improve the instability resistance of the large vacuum spherical tank.
引文
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