纯弯曲载荷下变刚度圆柱壳屈曲结构优化设计  

Buckling Analysis and Optimization of Variable Stiffness Cylindrical Shell Under Pure Bending

作　　者：吉增香 宋明伟 谢丽婷 陈春露 马春花 JI Zengxiang;SONG Mingwei;XIE Liting;CHEN Chunlu;MA Chunhua(Sinoma Science&Technology(Su Zhou)Co.,Ltd.,SuZhou 215021)

机构地区：[1]中材科技(苏州)有限公司,苏州215021

出　　处：《纤维复合材料》2022年第4期31-38,共8页Fiber Composites

基　　金：中国建材集团攻关专项资助(2021YCJS02)。

摘　　要：纤维铺放成型技术极大的提高了复合材料结构的可设计性。本文采用MATLAB遗传算法与ANSYS有限元分析分别对在有强度约束和没有强度约束的弯曲载荷下的变刚度圆柱壳临界屈曲载荷进行优化设计。优化结果显示直线纤维铺层的最大屈曲载荷分别为1511N·m和2189N·m,而优化后得到的变刚度铺层结构的最大屈曲载荷分别为2017N·m和2800N·m,分别增加了33.48%和27.93%。这是因为纤维曲线铺放改变了面内刚度,使拉伸区域纤维能承载更大的拉力,压缩区域能承受更大的屈曲载荷。Fiber placement technology endow powerful designability of composite structure. With the Genetic Algorithm of Matlab and ANSYS,the maximum buckling load of the variable stiffness cylindrical shell under pure bending with and without the strength constraints are studied. It was shown that the maximum buckling moment of straight line cylinder is 1511N·m and 2189N·m in each of the two strength constraints, while the variable stiffness cylinder is 2017N·m and 2800N·m,improve 33.48% and 27.93% compared with the constant stiffness cylinder. The change of in-plane stiffness with variable angle can carry more tensile force and buckling moment.

关 键 词：复合材料 变刚度 圆柱壳 遗传算法 临界屈曲载荷 纤维铺放 

分 类 号：TB33[一般工业技术—材料科学与工程]