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A local--global FE model for nonlinear analysis of column- supported shells of revolution

机译:局部-全局有限元模型,用于圆柱支承的旋转壳的非线性分析

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A local--global finite element model suitable for the analysis of col- umn--supported shells is presented. The model combines, in a sin- gle analysis, axisymmetric shell elements, general shell elements, and column elements. Axisymmetric or rotational shell elements are employed in the axisymmetric portion of the tower in which the nonaxisymmetric behavior in loading and deformation is accounted for by including appropriate Fourier harmonics. The col- umn-supported area is modeled using individual column elements. The local zone is identified as the region consisting of the column elements and the general shell elements inserted between the col- umn--support area and the axisymmetric shell portion. In addition any deviation from the axisymmetric geometry of the shell, such as imperfections or Cut-outs, can be easily included in the local zone. An example which uses the proposed procedure as well as a commercial program is presented.
机译:提出了适用于柱支撑壳分析的局部全局有限元模型。该模型在一次分析中将轴对称壳单元,通用壳单元和圆柱单元组合在一起。塔的轴对称部分采用轴对称或旋转壳单元,其中通过包含适当的傅立叶谐波来说明载荷和变形中的非轴对称行为。列支持的区域是使用单个列元素建模的。局部区域被标识为由柱元素和插入到柱支撑区域和轴对称壳部分之间的普通壳元素组成的区域。另外,与壳体的轴对称几何形状的任何偏差(例如瑕疵或切口)都可以轻松地包含在局部区域中。给出了使用所建议的程序以及商业程序的示例。

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