空间薄膜结构粘接缝模型的建立与验证  

Modeling and Verification of Adhesive Bonded Joint of Space Membrane Structure

作　　者：操安博 林秋红[1] 邱慧[1] 李潇[1] 刘志全[1] CAO Anbo;LIN Qiuhong;QIU Hui;LI Xiao;LIU Zhiquan(Beijing Institute of Spacecraft System Engineering,Beijing 100094,China)

机构地区：[1]北京空间飞行器总体设计部,北京100094

出　　处：《宇航学报》2023年第11期1777-1784,共8页Journal of Astronautics

基　　金：国家自然科学基金(U1937202)。

摘　　要：针对Hart-Smith板壳粘接缝模型不适用于空间薄膜结构粘接缝的问题及空间薄膜结构高精度设计中粘接缝二维模型缺失的问题,开展了空间薄膜结构粘接缝模型的建立与验证工作。首先基于Kirchhoff板理论建立了空间薄膜结构粘接缝的三维模型,计算了粘接缝内部剪应力和剥离应力分布;其次,将三维模型映射到二维,建立了薄膜粘接缝二维等效模型,给出了二维等效模型的杨氏模量和强度的计算方法;最后,对薄膜粘接缝二维等效模型进行了仿真校验,仿真结果表明,根据二维等效模型求得的杨氏模量误差为4.5%~11.8%,且该误差与粘接缝宽度正相关。仿真校验证实了粘接缝的主要失效模式为剪切,且粘接缝的等效强度不受粘接缝宽度影响。当粘接缝宽度为5 mm时,二维等效模型比Hart-Smith模型求得的等效强度误差减小了29.2%。薄膜粘接缝二维等效模型为空间薄膜结构高精度设计提供了参考。To solve the inadequacy of Hart-Smith shell adhesive bonded joint model when applied to space membrane structure and the lack of two-dimensional model in high-precision space membrane structure design,membrane adhesive bonded joint models are built and verified.Firstly,a three-dimensional model is built based on Kirchhoff plate theory,and the shear stress and peel stress distribution in the joint are calculated.Secondly,the three-dimensional model is mapped to build a two-dimensional model,and the Young’s modulus and strength of the joint are obtained.Finally,the equivalent model is verified by simulation.The difference of Young’s modulus between the equivalent model and the simulation is 4.5%~11.8%,and this difference is positively correlated to the width of the joint.The difference of strength of the equivalent model is 29.2%smaller than the difference of Hart-Smith model when the width is 5 mm.The two-dimensional model of membrane adhesive bonded joint provides a foundation for high-precision space membrane structure design.

关 键 词：空间薄膜 粘接缝 Kirchhoff板 Hart-Smith模型 

分 类 号：V414[航空宇航科学与技术—航空宇航推进理论与工程]