面向空间天线的TWF复合材料性能研究  

Research on performance of TWF composites for space antenna

作　　者：李怡晨 宋燕平[1] 胡飞 LI Yichen;SONG Yanping;HU Fei(China Academy of Space Technology(Xi′an),Xi′an 710000,China)

机构地区：[1]中国空间技术研究院西安分院,西安710000

出　　处：《中国空间科学技术》2020年第3期25-35,共11页Chinese Space Science and Technology

基　　金：国家自然科学基金(11290154,U1537213)。

摘　　要：利用碳纤维三向编织物(triaxial woven fabric,TWF)作为增强材料,与柔性基体材料硅橡胶复合,制成兼具一定柔性和刚性的复合材料壳膜结构,用于卫星天线反射器,是一种新型的高精度可展开天线实现方案。采用复合材料细观方法,对碳纤维增强硅橡胶TWF复合材料进行了力学性能的研究。首先由纤维和基体的材料特性得到均质纤维束的材料特性;接下来考虑纤维束交织情况(起伏波动)建立由纤维束组成的单胞实体有限元模型;然后对单胞实体有限元模型进行均匀化分析,施加周期性边界条件,最终得到等效的均质材料特性;为满足天线反射器高性能需求,分析了碳纤维种类、纤维体积分数对单胞等效性能的影响规律。对该材料力学性能的研究,可以为其未来应用于大型高精度可展开天线反射器提供一定的理论依据。Using a carbon fiber triaxial woven fabric(TWF) as a reinforcing material and compounding it with a suitable flexible matrix material, a carbon fiber three-directional woven composite shell film structure is formed,featuring both flexibility and rigidity. As a satellite antenna reflector, it is a new type of high precision deployable antenna implementation. The mechanical properties of silicone matrix TWF composites were studied. Using the composite mesoscopic method, the material properties of the homogeneous fiber bundle were obtained from the material properties of the fiber and the matrix. Then, considering the fiber bundle interlacing(undulation fluctuation), a unit cell finite element model composed of the fiber bundle was established. Homogenization analysis of the unit cell finite element model was carried out, applying periodic boundary conditions, and finally obtaining equivalent homogeneous material properties. In order to meet the high performance requirements of antenna reflectors, the influence of carbon fiber type and fiber volume content on the equivalent performance of unit cell was analyzed. The mechanical properties of the material were studied, which provides a theoretical basis for its application to large deployable high-precision antenna reflectors in the future.

关 键 词：高精度可展开天线 硅橡胶基TWF复合材料 细观建模 周期性边界条件 参数性能分析 

分 类 号：V554.3[航空宇航科学与技术—人机与环境工程]