尺寸高稳定性复合材料桁架结构的研制

Development of a high dimensional stable composite truss

介绍了某卫星复合材料桁架结构的研制情况,通过材料选择、铺层设计、材料的热膨胀系数测试与分析,制造了高精度的复合材料桁架,并测量了结构的热变形。测量结果表明:采用高模量碳纤维复合材料能够制造出热变形只有微米级的高稳定结构。这是针对超稳卫星平台所需的尺寸高稳定性结构的首次成功探索。文章最后对进一步降低结构热变形、提高尺寸稳定性和测量精度提出了建议。

A high dimensional stable composite truss used for a certain satellite is discussed in this paper. Through the material selection, the ply design, and the CTE test & analysis, a high precision composite truss is manufactured, and the thermal deformation of the truss is measured. It is shown that the high dimensional stable structure made of high modulus CFRP with micrometer level accuracy can be obtained through an appropriate ply design. Some suggestions are made for reducing the thermal deformation and improving the dimensional stability & measurement accuracy. It is the first successful practice of the high dimensional stable composite structure being used for the ultra-stable satellite platform.