摘要
蜂窝夹芯板是飞行器中一种常见的热结构,在服役过程中其面板表面容易形成不同形状的凹坑。为了研究不同形状凹坑对蜂窝夹芯板屈曲性能的影响,基于Python语言构建了含圆形凹坑缺陷、含正方形凹坑缺陷、含正三角形凹坑缺陷蜂窝夹芯板参数化有限元模型,分析了恒温和变温下凹坑缺陷关键参数对蜂窝夹芯板特征值屈曲性能影响规律,结果表明不管是恒温环境还是变温环境,随着凹坑缺陷直径(边长)或者凹坑深度的增大,蜂窝夹芯板临界失稳载荷降低;对比分析了等面积缺陷和等周长缺陷下3种典型缺陷对结构特征值屈曲性能的影响,结果表明等面积缺陷下,含圆形凹坑缺陷蜂窝夹芯板的临界失稳载荷略大于其余两者,等周长缺陷下,含正三角形凹坑缺陷蜂窝夹芯板的临界失稳载荷略大于其余两者。
Honeycomb sandwich panel is a common hot structure in aircraft,and pits of different shapes are easily formed on its surface during service.In order to study the effect of different shapes of pits on the eigenvalue buckling performance of the honeycomb sandwich panel,three kinds of parametric finite element model for honeycomb sandwich panel with pit defects were built,namely circular pit,quadrate pit,and equilateral pit.Influence of key parameters on the eigenvalue buckling performance of the honeycomb sandwich panel was analyzed under both constant temperature and variable temperature environment.The results show that with the increasing of diameter or dopth of the pit defect,the critical buckling load increases under both the two temperatures environment.By using contrastive analysis method,the influence of the three kinds of pit defects on the structure was obtained when the pit defects have the same area or the same perimeter.When the pit defects have the same area,the structure with circular pit has the largest critical buckling load and when the pit defects have the same perimeter,the structure with equilateral pit has the largest critical buckling load,and both the differences among them are negligible.
作者
蒋国庆
陈万华
马斌
赖欢
JIANG Guo-qing;CHEN Wan-hua;MA Bin;LAI Huan(Facility Design and Instrumentation Institute,China Aerodynamics Research and Development Center,Mianyang 621000,China)
出处
《科学技术与工程》
北大核心
2024年第14期5797-5803,共7页
Science Technology and Engineering
基金
军内科研项目。
关键词
凹坑缺陷
蜂窝夹芯板
特征值屈曲
参数化
pit defect
honeycomb sandwich panel
eigenvalue buckling
parameterization
