复合材料十字梁结构的优化设计

基于数值仿真分析方法,针对某航天器结构中的十字梁结构进行了优化设计。依据结构承载特点,优化了传力路径,合理地设计了加强区域以及铺层顺序,并采用复合材料整体铺设成型工艺制备了试验件。试验结果表明,经过优化设计,十字梁结构重量由699 g降低到436 g,减重达37.6%,在6000 N压缩载荷作用下的最大变形由0.33 mm降低到0.19 mm,满足其刚度设计要求。

THE OPTIMAL DESIGN OF COMPOSITE CROSSED BEAM STRUCTURE

Based on the numerical method,the work of optimizing composite crossed beam structures in spacecraft was conducted in this paper.The load-transferred path was optimized depending upon the load-bearing structure components.Furthermore,the enhanced region and lay-up of T700 unidirectional carbon/epoxy prepregs were reasonably presented,while the specimen was fabricated integrally by manual molding technology.The experimental results demonstrate that the weight of this crossed beam is reduced from 966 g to 436 g,up to 37.5％;the maximum deformation is reduced from 0.33 mm to 0.19 mm under the 6000 N compressive load,which satisfied the stiffness demand.