In order to obtain a light weight, optimized and high-stiffness mirror body, the application of topology optimization is undisputed. By means of ansys software, evolutionary structure optimization method (ESO) is modified to superintend the spatial material distribution among the body. Various parameters in ESO and finite element modal are took into consideration to post the difference effect in the loop. Subsequently both perpendicular and horizontal load case analysis are carried out respectively, and the intersection of result is the non-effective section which will be deleted, complex conditions load-carrying path is the residual. A 3-D modal in multi-point support style is construed based on smoothed elements contour. There is some diversity combined with consistent in compared to regular topology outcome. Finally some advice can be drawn from above which provides a certain value of reference for later design.%针对目前反射镜拓扑优化存在的局限性和渐进结构优化的优点,提出了用渐进结构优化的方法对镜体进行拓扑寻优.分析了渐进结构优化的原理并进行了改进,同时对比了不同模型和删除参数的影响,对镜体在竖直和水平两种工况下分别进行分析,得到了在复合工况下材料的最佳分布(载荷传递路径),分析了这个结果与现有镜体结构形式的异同,给出了改进建议,根据上述最佳材料分布加以整理,提出了一种多点支撑下的镜体结构形式,对以后相关设计具有一定的参考价值.
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