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开口圆柱薄壳结构的轴向承载能力和稳定性分析是空间薄壁管式伸展机构(STEM,Storable Tubular Extendable Member)设计的关键问题之一.基于特征值屈曲分析方法,研究了轴压铍青铜开口圆柱薄壳结构在两端固支条件下的屈曲载荷与设计参数间的关系,利用幂函数拟合的方法建立了一种轴压开口圆柱薄壳屈曲载荷模型.通过铍青铜开口圆柱薄壳轴向压缩试验对特征值屈曲分析和所建立的轴压开口圆柱薄壳屈曲载荷模型进行了验证.结果表明:特征值屈曲分析方法可用于各向同性材料开口圆柱薄壳结构在两端固支条件下的轴向承载能力与稳定性分析;使用轴压开口圆柱薄壳屈曲载荷模型计算各向同性材料的开口圆柱薄壳在两端固支条件下受轴压作用时的屈曲载荷,最大误差为21%.
The analysis of the axial bearing capacity and stability of the open cylindrical thin shell structure is one of the key issues in the design of the Storable Tubular Extendable Member (STEM). Based on the eigenvalue buckling analysis, The relationship between the buckling load and the design parameters of the open cylindrical thin shell structure under the condition of both ends clamped is established by using the power function fitting method. A buckling load model of a thin cylindrical shell with axial compression is established. The axial compression test verifies the eigenvalue buckling analysis and the established buckling load model of cylindrical shell under axial compression. The results show that the eigenvalue buckling analysis method can be applied to the cylindrical shell structure with isotropic opening at both ends Under axial compressive load and stability analysis. Using the buckling load model of cylindrical shell with axial compression, the buckling load of cylindrical shell with isotropic material subjected to axial compression at both ends is calculated. The maximum error 21%.