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.
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.
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