平板网架结构分析的三角形超级元法

A Triangular Super Element for Analyzing ofBuilt-up Structure with Truss Member System

对平板网架结构采用二维三角形超级单元的分析方法 .将大型平板网架结构离散成一系列三角形超级单元 ,考虑弯曲、剪切、挤压、翘曲等多种非经典变形效应 ,通过自由度的转换 ,变为二维问题的求解 .此法与一般有限元法相比 ,减少了未知量 。

This paper presents a two-dimensional triangular super element for analyzing thebuild-up structure with the truss member system. Considered to sustain bend, shear, extrusion and warp, the structure is partitioned into many triangular super elements and is analyzed with the FEM. It makes the problem to solve the complex build-up structure with many member system which is changed into the two-dimensional problem. The results indicate that the super element can decrease the number of the unknowing varies, the accuracy of the proposed method is well.