摘要
介绍了一种大口径主反射镜轻量化结构拓扑优化设计方法,该方法是一种理论性强、效率高的新型轻量化优化设计方法。采用变密度法建立连续体结构拓扑优化数学模型,利用OPTISTRUCT优化软件,以主反射镜光轴垂直时在自重作用下的镜面变形与第一阶自然频率作为约束,将主反射镜体积最小作为目标函数进行了连续体拓扑优化。依据优化的拓扑结构形式,结合结构力学及灵敏度分析得到了满足镜面面型、结构刚度及轻量化率要求的最佳主反射镜轻量化结构。
Using topology optimization,a new method of lightweight mirror is put forward,with strong theory and high efficiency.The continuum structure topological optimization mathematical model is created with the variable-density method.By means of OPTISTRUCT software,the maximum deformation of the surface of primary mirror under the gravity and the first model frequency are assigned to response variable,the entire volume of mirror is converted to object function.According to the topological structure,the optimum lightweight mirror is built satisfying the wave front error and the structural stiffness and the ratio of weight,considering structural mechanics and sensitivity analysis.
出处
《光学技术》
CAS
CSCD
北大核心
2008年第2期236-238,共3页
Optical Technique
关键词
主反射镜
拓扑优化
变密度法
灵敏度
primary mirror
topology optimization
variable-density method
sensitivity analysis
