微光夜视仪空间棱镜架有限元热分析  

Finite Element Thermal-stress Analysis of the Space Prism Holder of Low-light Night Vision Goggles

作　　者：高明[1] 王占军[1] 

机构地区：[1]西安工业大学光电工程学院,西安710032

出　　处：《西安工业大学学报》2011年第1期18-23,共6页Journal of Xi’an Technological University

基　　金：国防科工委基础科研资助项目(B2220XXXX84)

摘　　要：空间棱镜架是单管双目微光夜视仪机械结构重要组成部分,其设计的好坏直接影响夜视仪系统成像质量和整机性能.文中基于有限元分析理论,利用ANSYS研究了单管双目微光夜视仪空间棱镜架的温度场及热应力.通过建立结构三维有限元分析模型,计算棱镜架温度场分布,对热应变和热应力进行求解,完成空间棱镜架有限元热分析.在满足工作环境从-30℃到50℃变化条件下,对比有限元热分析求解结果,选取改性聚苯醚作为结构最终材料,改进初始结构,完成夜视仪空间棱镜架设计.The space prism holder is a vital mechanical component of a low-light night vision goggle with single objective and two oculars.Its design has a direst impact on the imaging quality and the performance of a low-light night vision goggle.Based on the finite element analysis theory,the thermal temperature field and the thermal stress of the space prism holder＇s mechanical structure are studied by ANSYS.The thermal analysis of the space prism holder is made by means of creating a finite element model of mechanical structure,calculating the distribution field and analyzing the distribution and the location of thermal stress.In order to meet the need that the working temperature ranges from-30 ℃ to 50 ℃,the modified polypheylene oxid is chosen as the material of the space prism holder.The design of its mechnical structure is accomplished after the improvement in primary designed structure.

关 键 词：夜视仪 有限元 温度场 热应力 

分 类 号：TN223[电子电信—物理电子学]