超音速飞行器光学窗口气动压力载荷分析  

Analysis of aerodynamic pressure loading for supersonic aircraft optical window

作　　者：罗传伟[1] 常伟军[1] 强华[1] 焦明印[1] 

机构地区：[1]西安应用光学研究所,陕西西安710065

出　　处：《红外与激光工程》2011年第4期664-667,共4页Infrared and Laser Engineering

基　　金："十一五"兵器预研支撑基金(62301110101)

摘　　要：为了提高光学窗口设计的可靠性与使用性能,对超音速飞行器进行了计算流体力学分析,得到27种飞行状态下光学窗口的气动压力载荷分布。通过有限元建模仿真,计算了窗口在各压力载荷状态下的应力和变形。通过分析变形对光学成像的影响可知,ZnS平板的两个变形面在光学上具有相互补偿的作用,因此,压力载荷下的变形对光学成像的影响可以忽略。为了使窗口设计满足使用强度要求,在最严酷的一种飞行状态下,分析了不同厚度ZnS窗口玻璃的变形和应力,当平板厚度为10mm时,能够在结构强度和质量之间达到设计的平衡。此分析结果对高速载体的光学窗口设计具有一定的指导作用。To improve the reliability and performance of optical window,aerodynamic pressure loading data in 27 flight states was obtained by computational fluid dynamics（CFD） analysis of the supersonic aircraft.Through the finite element analyzing,stress and deformation of optical window were calculated and analyzed under each pressure loading.It is shown that the two deformed surfaces of ZnS plate glass can compensate each other in optical imaging,so that the influence of deformation due to pressure loading on optical imaging can be ignored.In order to make the window design satisfy structural strength demand,ZnS plate glass with different thickness was analyzed in the most severe flight state.According to the data of stress and deformation,plate of 10 mm thickness is the best design which reaches the balance between structural strength and weight.This result will play a guiding role in optical window design of high speed aircraft.

关 键 词：光学窗口 超音速 有限元分析 压力载荷 

分 类 号：TN214[电子电信—物理电子学]