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作 者:陈龙 张宇[1] 谢康 刘治 周慎敏 Chen Long;Zhang Yu;Xie Kang;Liu Zhi;Zhou Shenmin(Faculty of Mechanical and Electrical Engineering,Kunming University of Science and Technology,Kunming 650500,Yunnan,China)
机构地区:[1]昆明理工大学机电工程学院,云南昆明650500
出 处:《激光与光电子学进展》2023年第23期259-265,共7页Laser & Optoelectronics Progress
摘 要:红外光学镜头的工作环境复杂,常受到外部载荷冲击。针对某款长波红外光学镜头建立了ANSYS有限元分析模型,对其进行峰值加速度为100g、持续时间为6 ms的半正弦冲击仿真分析。对提取的数据进行刚体位移、峰谷值(PV)和均方根值(RMS)的计算,并运用泽尼克多项式对冲击之后的透镜面形进行拟合,求解泽尼克多项式系数,分析冲击对红外光学镜头性能的影响。基于响应面法对红外光学镜头进行优化,对优化之后的模型进行冲击仿真,并进行对比分析。分析结果表明:对红外光学镜头进行优化,冲击之后透镜的最大变形量与最大等效应力有所降低,表征透镜面形变化的PV、RMS也有所下降;对结构进行优化,能够在一定程度上降低冲击对其造成的影响。The working environment of an infrared optical lens is complicated and often affected by external loads.A finite element analysis model is established in ANSYS for a long-wave infrared optical lens,and half-sine impact simulation analysis with a peak acceleration of 100g and duration of 6 ms is conducted.The rigid-body displacement,peak to valley(PV),and root mean square(RMS)values of the extracted data are calculated,and the Zernike polynomial is used to fit the lens surface shape after impact to estimate the Zernike coefficient.Correspondingly,the impact on the performance of the infrared optical lens is analyzed.Based on the response surface method,the infrared optical lens is optimized,simulations on the impact of the optimized model are conducted,and comparative analysis is performed.The results show that the maximum deformation and the maximum equivalent stress of the lens after impact are reduced due to the optimization of the infrared optical lens;additionally,the PV and RMS values,which represent the changes in the surface shape of the lens,decrease.Thus,optimizing the structure can reduce the impact to a certain extent.
关 键 词:长波红外光学镜头 半正弦冲击 泽尼克多项式 响应面优化
分 类 号:TH164[机械工程—机械制造及自动化]
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