【作者】 李嫒； 利凤祥； 李越森； 王锟； 胡春波；

【Author】 LI Yuan~1 LI Feng-xiang~(12) LI Yue-sen~1 WANG Kunt~1 HUChun-bo~21.Design Department of The Fourth Academy of CASC,Xi’an 710025;2.Northwestern Polytechnical University,Xi’an 710072

【机构】 中国航天科技集团公司四院设计部； 西北工业大学；

【摘要】 利用有限元结构分析法,对某固体火箭发动机纤维缠绕复合材料壳体在均布外压作用下的稳定性进行了分析。计算分别采用线性及非线性屈曲理论,求出了壳体的外压屈曲临界载荷并与试验结果进行对比,结果表明初始几何缺陷对壳体外压临界载荷有很大的影响,给结构加入适当的缺陷可以更好的模拟实际中含有缺陷的壳体,预示真实壳体的外压临界载荷,为固体发动机复合材料壳体的稳定性工程设计提供参考。更多还原

【Abstract】 Stability behavior of a laminated cylinderical composite shell of solid rocket motor under external pressure isinvestigated by the finite element method.The stability theories for the composite structure analysis are both linear basedon the classical shell theory and nonlinear by means of arc method.It calculates the external buckling load of shell andcompares calculation results with testing results.The outcome shows that initial geometrical limitations affect bucklingload greatly.Adding proper limitations to structures can make the finite element model well simulate geometricalimperfection of structure and expect buckling load of actual shell better.So primary estimation of shell buckling loads mayoffer referrence for the stability engineering design of solid motor composite shell.更多还原