摘要
大口径反射镜一般工作在上仰状态或者竖直状态,这两种状态下的支撑方式都比较成熟;而在工作于下倾状态时,底支撑结构与前两种状态相比要复杂的多。在分析比较了多种结构方案的基础上,提出了较为可行的两种支撑方案,滑轮重锤方案和杠杆重锤方案;并对两种方案进行比较,选择了最适合的杠杆重锤方案应用在口径1.5m球面反射镜的支撑系统中。通过ansys有限元分析软件对支撑点进行优化,采用拟合方法计算镜面不同支撑状态受力变形条件下的PV值和RMS值,满足设计要求,达到了较高精度。实际应用状态下镜面检验结果满足设计要求,验证了设计方案的合理性和可行性。
Generally,the large- aperture mirrors work in upward sloping or vertical status and these support structures are maturely researched.However,if it＇s downward sloping,the support structure will be more complex.Base on a variety of structure analysis programs ,we now offer two suitable solutions,and through the comparison between them,the lever hammer is selected to use in the support structure of 1.Sm sphere mirror.The support points are optimized through the FEA.It meets the design requirements and gets a high accuracy by calculating the PV value of the deformation and the RMS value. The actual practices prove the solution is reasonable and feasible.
出处
《机械设计与制造》
北大核心
2012年第3期113-115,共3页
Machinery Design & Manufacture
关键词
大口径
反射镜
支撑结构
优化
下倾
Large-aperture
Mirror
Support structure
Optimization
Downward sloping
