摘要
采用尺度关联的一体化设计方法开展了旋转周期圆环结构的拓扑优化设计研究,以宏观结构的最大刚度为目标,研究了材料表征体胞尺度、构型以及不同载荷作用形式对蜂窝夹芯圆环结构优化结果的影响.所提出的无量纲结构构型因子实现了优化结构的结构效率量化评估.结合SIMP材料模型和周长控制方法,实现了宏观结构和细观表征体胞的优化设计,获得清晰的材料分布.数值算例表明,尺度关联的一体化设计方法能有效地完成圆环结构的拓扑优化设计,设计结果充分反映体胞尺度效应对旋转周期圆环结构夹芯构型的影响.
A scale-related optimization method is proposed for the topology design of cyclic symmetry structures. With the objective of maximizing the structural rigidity, the influences of the scale and topology of representative volume element （RVE） as well as different loading cases upon the optimal configurations are studied. A dimensionless structure topology factor is proposed to quantify the structure optimization efficiency. By means of the model of solid isotropic material with penalization （SIMP） and the perimeter control method, the macro material layout and RVE are optimized. A clear topology configuration is obtained without checkerboard. The results demonstrate that the scale-related topology optimization method is valid for optimal design of cyclic symmetry structure and that the scale effect of RVE can be well revealed in the optimal configuration of the structure.
出处
《力学学报》
EI
CSCD
北大核心
2007年第6期788-795,共8页
Chinese Journal of Theoretical and Applied Mechanics
基金
国家自然科学基金(10676028
90405016)
航空科学基金(04853080
2006ZA53006)
973计划(2006CB601205)
博士点基金(20060699006)
南昌航空大学科研启动基金(EA200703093)
863计划(2006AA042122)
高等学校学科创新引智计划(B07050)资助项目.~~
关键词
拓扑优化
尺度效应
结构构型因子
旋转周期结构
表征体胞
topology optimization, scale effect, structure topology factor, cyclic symmetry structure, representative volume element
