复合材料扁双曲壳的几何非线性分析

板壳结构主要采用有限单元法进行结构设计分析,由于有限单元法设计变量较多,计算复杂,采用Bezier曲面多项式为壳体中面位移和转动分量的试解函数,用半解析法分析了复合材料扁双曲壳在外载荷作用下的变形.结果表明,挠度从中心点到横截面边缘逐渐减少且变化的趋势逐渐增大,半解析解和解析解的分析结果吻合良好,可在工程中借鉴应用.

Geometrically Non-linear Analysis of Composite Shallow Double Curved Shells

The finite element method is the main method to analysis of the the plate shell structural design.Because many variables are used in the finite element method and the computation is complex,this research has used Bezier surface patches as the admissible displacement fields to represent the shell's middle surface displacement and rotation components,the deformation of the shallow double curved shells under the loads are studied with a Semi-analytical procedure.The results show that the amount of deflection reduces the tendency from the central point to the lateral section edge,the change tendency increases gradually,semi-analytical and analytical procedure are in good agreement with the results of the analysis,which can be applied in the project.