复合材料壳体轴压稳定性分析  

Stability analysis of composite case under axial pressure

作　　者：李媛[1] 利凤祥[1] 李越森[1] 王锟[1] 胡春波[2] 

机构地区：[1]中国航天科技集团公司四院,西安710025 [2]西北工业大学,西安710072

出　　处：《固体火箭技术》2004年第4期280-283,共4页Journal of Solid Rocket Technology

摘　　要：利用有限元结构分析法,引入线性屈曲模态作为结构的初始几何缺陷,对复合材料壳体的轴压稳定性进行了非线性分析。将计算结果与线性屈曲分析及实验结果进行了对比,结果表明,由于初始缺陷等非线性因素的影响,结构的线性临界载荷高于非线性临界载荷,进行非线性分析是必要的。文中对壳体承受轴压能力进行了初步估计,可为复合材料壳体的稳定性工程设计提供参考。Regarding the linear buckling mode as the initial geometrical defect of the structure, the stability nonlinear analysis of composite case under axial pressure was made by means of the finite element method. The comparison between the nonlinear buckling analysis and linear buckling analysis and the test results show that the linear critical load is higher than the nonlinear critical load because of the influence of the nonlinear factors such as the initial geometrical defect, so nonlinear analysis is necessary. The load bearing capacity of the composites case, which can provide a reference to the stability engineering design of the composites case, is preliminarily estimated.

关 键 词：复合材料壳体 模态 轴压 非线性分析 估计 临界载荷 稳定性分析 结构分析法 有限元 实验结果 

分 类 号：V435[航空宇航科学与技术—航空宇航推进理论与工程]