基于等几何分析方法的复合材料加筋板屈曲分析

doi:10.19936/j.cnki.2096-8000.20220528.003

复合材料科学与工程 ›› 2022, Vol. 0 ›› Issue (5): 21-27.DOI: 10.19936/j.cnki.2096-8000.20220528.003

基于等几何分析方法的复合材料加筋板屈曲分析

秦晓陈, 李晨, 陈程, 高丽敏

中国商飞北京民用飞机技术研究中心民用飞机结构与复合材料北京市重点实验室,北京 102211

收稿日期:2021-01-24 出版日期:2022-05-28 发布日期:2022-07-19
作者简介:秦晓陈(1993-),女,博士研究生,工程师,主要从事飞机结构强度设计与分析方面的研究,qinxiaochen@comac.cc。

Buckling analysis of composite stiffened plates based on IGA method

QIN Xiao-chen, LI Chen, CHEN Cheng, GAO Li-min

Beijing Key Laboratory of Commercial Aircraft Structures and Composite Materials, Comac Beijing Aircraft Technology Research Institute, Beijing 102211, China

Received:2021-01-24 Online:2022-05-28 Published:2022-07-19

摘要/Abstract

摘要： 采用基于层次T网格上的多项式样条(PHT样条)的等几何分析(IGA)方法对复合材料层合加筋板进行屈曲分析,实现了加筋板的精确几何建模以及加强筋和层合板衔接区域的网格局部细化,避免了几何误差,简化了细化过程,节省了计算时间,提高了计算效率。通过数值计算,验证了计算方法的正确性和收敛性,得到了加强筋的铺层数和铺层角度对层合加筋板屈曲特性的影响情况。计算结果表明,层合加筋板的屈曲载荷随着铺层数的增加逐渐增大,且基本呈现线性增大的趋势;当0°方向铺层固定时,屈曲载荷基本保持一定;随着0°方向铺层数的增加,±45°或90°方向铺层数减少,屈曲载荷逐渐增大。

关键词: PHT样条, 等几何分析, 加筋板, 屈曲, 复合材料

Abstract: The Polynomial splines over Hierarchical T-meshes (PHT-splines) based Isogeometric Analysis (IGA) method is used to analyze the buckling characteristics of composite stiffened plates. The method realizes the accurate geometric modeling of the stiffened plates and the local refinement of the connection area between stiffeners and plates, as well as avoiding geometric errors, simplifying the refinement process, saving calculation time and promoting calculation efficiency. The correctness and convergence of the method are verified by numerical calculations. The effects of the ply number and ply angle of the stiffeners on the buckling characteristics of laminated stiffened plates are obtained. The results show that the buckling load of the laminated stiffened plates raises linearly along with the ply number. When the 0°-direction ply is fixed, the buckling load remains basically unchanged. When the ply number increases in 0°-direction and decreases in ±45°-direction or 90°-direction, the buckling load raises gradually.

Key words: PHT-splines, IGA, stiffened plates, buckling, composite

中图分类号:

TB332

秦晓陈, 李晨, 陈程, 高丽敏. 基于等几何分析方法的复合材料加筋板屈曲分析[J]. 复合材料科学与工程, 2022, 0(5): 21-27.

QIN Xiao-chen, LI Chen, CHEN Cheng, GAO Li-min. Buckling analysis of composite stiffened plates based on IGA method[J]. COMPOSITES SCIENCE AND ENGINEERING, 2022, 0(5): 21-27.

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基于等几何分析方法的复合材料加筋板屈曲分析

Buckling analysis of composite stiffened plates based on IGA method

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