【摘 要】
：
为了使得某2m望远镜消旋K镜在重力环境温度变化的影响下镜面面形和结构刚度满足要求,设计了一种柔性支撑结构。KM1支撑方式采用背部三点支撑,通过有限元软件ANSYS对支撑位置
【机 构】
：
中国科学院长春光学精密机械与物理研究所,中国科学院大学,吉林工商大学图书馆,
论文部分内容阅读
为了使得某2m望远镜消旋K镜在重力环境温度变化的影响下镜面面形和结构刚度满足要求,设计了一种柔性支撑结构。KM1支撑方式采用背部三点支撑,通过有限元软件ANSYS对支撑位置进行优化。并基于伴随变换建立了柔性支撑杆的柔度矩阵,对柔性铰链的厚度、长度和宽度进行优化,使反射镜支撑刚度满足需求,并减轻热应力和装配应力面形的影响。KM2采用周边三点支撑,间隔120°均匀分布,支撑杆结构与KM1相同。在重力和均匀温降的联合工况下,KM1和KM2的有限元仿真结果达到了设计要求,KM1镜面面形RMS低于λ/40,KM2镜面面形RMS低于λ/60,一阶谐振频率均高于100Hz。
In order to make the mirrored profile and structural rigidity meet the requirements of a 2m telescope K-mirror under the influence of the temperature change of gravity environment, a flexible supporting structure is designed. KM1 support using the back three-point support, through the finite element software ANSYS to optimize the support position. And based on the concomitant transformation, the flexibility matrix of flexible support rods is established to optimize the thickness, length and width of the flexible hinge so that the support stiffness of the mirror meets the requirements and the effects of thermal stress and assembly stress profile are reduced. KM2 using three peripheral support, evenly spaced 120 °, support rod structure and KM1 the same. Under the combined conditions of gravity and uniform temperature drop, the simulation results of KM1 and KM2 meet the design requirements. The RMS of the mirror surface of KM1 is less than λ / 40 and the RMS of mirror surface of KM2 is less than λ / 60. The first-order resonance The frequency is higher than 100Hz.
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