摘要
碳纤维增强复合材料(CFRP)制作的复合薄壁透镜管(CTLT)是一种在卫星通信中常用的空间展开机构,具有收纳比高、质轻、功耗低等优势,常用于太阳帆的卷曲收纳。该结构在完全展开时易因刚度不高而引发屈曲失效。提出一种基于近似模型的CFRP薄壁透镜管承载性能分析及优化设计方法。利用Python语言实现CTLT几何结构的参数化建模,通过近似模型分析方法建立几何参数和承载性能之间的映射关系。以一阶屈曲特征值最大为优化目标,采用多岛遗传算法对结构的几何参数进行优化。结果表明,神经网络近似模型的拟合精度最高,预测相对误差为1.096%。相比传统的有限元方法,该方法的设计效率提升了约59.63%,优化后的结构一阶屈曲特征值提高了97.6%。研究结果可为CFRP大型空间展开结构设计提供有效的技术支持。
Composite thin-walled lenticular tubes(CTLT)made of carbon fiber reinforced polymer(CFRP)are deployable structure,which are usually used in satellite communications.They have very prominent advantages such as high stowage ratio,lightweight,low power consumption,and are commonly used for the stowage of solar panels.However,the structure is prone to buckling failure due to low stiffness when fully expanded.Therefore,a CTLT load-bearing performance analysis and optimization design method based on approximate model method was proposed in this paper.The parametric modeling of the CTLT geometry was completed by using Python language and the mapping relationship between the geometric parameters and the load-bearing performance were established by the approximate model analysis method.With the maximum first-order buckling eigenvalue as the optimization objective,the geometric parameters of the structure were optimized using a multi-island genetic algorithm.The results show that the neural network approximation model has the highest fitting accuracy and the relative error of prediction is 1.096%.Compared with the traditional finite element method,the design efficiency of this method is improved by about 59.63%,and the first-order buckling eigenvalue of the optimised structure is increased by 97.6%.The results of the study provide effective technical support for the design of large space deployable structures.
作者
张文强
闫莉雪
朱姝
高宇
ZHANG Wenqiang;YAN Lixue;ZHU Shu;GAO Yu(College of Materials Science and Engineering,Donghua Urversity,Shanghai,China;Center for Civil Aviation Composites,Donghua Urversity,Shanghai,China;State Key Laboratory of Advanced Fiber Materials,Donghua Urversity,Shanghai,China)
出处
《东华大学学报(自然科学版)》
北大核心
2025年第2期83-93,共11页
Journal of Donghua University(Natural Science)
基金
中央高校基本科研业务费专项资金(2232024D-10)
国家自然科学基金(52173247)。
关键词
结构稳定性
优化设计
复合薄壁透镜管
可展开结构
structural stability
optimal design
composite thin-walled lenticular tube(CTLT)
deployable structure
