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变形镜的结构参数对其疲劳寿命的影响

Influence of Structural Parameters of Deformable Mirror on Its Fatigue Life

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摘要

在自适应波前校正过程中, 变形镜(DM)受驱动器循环机械驱动作用会产生疲劳累积损伤。利用DM的影响函数和最小二乘法对波前校正过程进行模拟, 采用有限元方法分析了DM在波前校正过程中的应力分布, 并结合Miner疲劳累积损伤理论, 计算了DM的疲劳寿命。在此基础上, 重点讨论了DM结构参数对影响函数和DM疲劳寿命的影响。研究结果表明, 对于给定的畸变波前, 当DM极头数相同时, 极头采用三角形排布方式时DM的交连值最小, 疲劳寿命最长; 极头采用正方形排布方式时DM的交连值最大, 疲劳寿命最短。此外, 当极头间距增大时, DM交连值会随之减小, 致使DM的疲劳寿命变长。当极头间距相同时, 增大极头半径和缩短极头长度会使DM的交连值变小, DM的疲劳寿命也会变短。极头间距变化对DM疲劳寿命的影响程度大于极头半径和长度;当极头间距一定时, 不同的排布方式对应的极头数目不同, DM的极头数越多, 疲劳寿命就越短。

Abstract

The cumulative fatigue damage of deformable mirrors (DMs) is generated due to the action of the circular mechanical drive of the actuators in the process of adaptive wavefront correction. The wavefront correction process of the DM has been simulated by the least squares method and the influence function of the DM, and the corresponding stress distribution of the DM in the wavefront correction process has also been analyzed by the finite element method. Additionally, the fatigue life of the DM has further been calculated with the Miner cumulative fatigue damage theory. On this basis, the influences of the structural parameters of the DM on the influence function and the fatigue life of the DM have been discussed. The results show that the coupling coefficient of the DM is minimal and the fatigue life is the longest when the poles are distributed in the triangular arrangement for the given distorted wavefront and the equal number of poles of the DM. However, the coupling coefficient of the DM is maximal and the fatigue life is the shortest when the poles are distributed in the square arrangement. Furthermore, the coupling coefficient of the DM decreases with the increasing pole spacing, resulting in the increasing fatigue life of the DM. Meanwhile, the coupling coefficient and the fatigue life of the DM decrease with the increasing pole radius and the decreasing pole length when the pole spacing is fixed. On the whole, the influence of the pole spacing on the fatigue life of the DM is more significant than that of the pole radius and length. Furthermore, for the given pole spacing, the number of the poles varies with pole distribution manners and the fatigue life of the DM decreases with the increasing number of poles.

Newport宣传-MKS新实验室计划
补充资料

中图分类号:TP273.2;O439

DOI:10.3788/AOS201737.1001003

所属栏目:大气与海洋光学

基金项目:科技部创新人才推进计划(2014RA4051)、苏州大学省级重点实验室开放课题(KSJ1404)

收稿日期:2017-03-29

修改稿日期:2017-06-09

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作者单位    点击查看

罗 帅:四川大学电子信息学院, 四川 成都 610064
陈丽霞:四川大学电子信息学院, 四川 成都 610064
张 彬:四川大学电子信息学院, 四川 成都 610064

联系人作者:罗帅(529951343@qq.com)

备注:罗 帅(1992-), 男, 硕士研究生, 主要从事变形镜疲劳损伤等方面的研究。

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引用该论文

Luo Shuai,Chen Lixia,Zhang Bin. Influence of Structural Parameters of Deformable Mirror on Its Fatigue Life[J]. Acta Optica Sinica, 2017, 37(10): 1001003

罗 帅,陈丽霞,张 彬. 变形镜的结构参数对其疲劳寿命的影响[J]. 光学学报, 2017, 37(10): 1001003

被引情况

【1】张建平,宗雨,朱文清,易勐. 光电产品的新型寿命预测模型及其应用. 光学学报, 2018, 38(2): 223001--1

【2】王玺,胡昌华,裴洪,庞哲楠,熊薇. 新研发光电产品的剩余寿命自适应预测方法. 光学学报, 2019, 39(12): 1223003--1

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