网壳结构分析的超级元法

A Super Finite Element Method of Analyzing Shell Type Truss Structure

提出了一种分析大型网壳结构的二维矩形超级元，给出了超级元分析的基本公式，其做法是将大型网壳结构离散成一系列矩形超级板元，考虑弯曲、剪切、挤压、翘曲等多种变形效应，采用构件自由度向超级元自由度的转换把大型多构件问题变为二维问题求解，并通过算例验证了在各种变形及几何形状情况下计算结果的可靠性和精确性。

This paper presents a two-dimensional rectangular super el ement for analyzing the larger shell type truss structure,gives the fu ndamental formulas of super element analysis.The structure, being part itional into many rectangular super element,and being considered to su stain bending, shearing, tension and compression, extrusion and warp, is analyzed with the FEM,this makes the problem of solving the complex built-up shell structure with many member system is changed into a tw o-dimensional problem.The reliability and accuracy of the results ,und er every conditions of deformation and geometric shape, are verified b y the numeral examples.