平板阵列隔热瓦几何参数的分析与优化

Optimization of geometric parameters for planar array thermal insulation tiles

为了研究缝隙参数对高超声速飞行器表面平板阵列隔热瓦变形的影响,在面积为1 m^2的平板上布置不同尺寸的隔热瓦,通过自编的Python语言实现平板阵列隔热瓦缝隙的参数化建模,并利用ISIGHT软件集成ABAQUS对平板阵列隔热瓦的近似模型进行仿真分析,得到缝隙参数的最优设计方案。结果显示:缝隙宽度相较于缝隙间距对隔热瓦间的接触应力影响更大,缝隙宽度越小接触应力越大;缝隙宽度要结合蒙皮温度上限考虑选取,缝隙间距选取隔热瓦边长的1/2即可。

This paper studies the effect of the gap parameters on the deformation of the thermal insulation tiles on the surface of a hypersonic flight vehicle. Different sizes of insulating tiles are laid on the floor of a planner board of 1 m^2. A parameterized model is established in the Python language. Simulation is performed with an approximate model of the planar array thermal insulation tiles using the ISIGHT and ABAQUS, to obtain the optimal layout scheme of the gap parameters. It is shown that the gap width has a greater effect on the contact stress than the gap spacing. The smaller the gap width, the greater the contact stress will be. To determine the gap width involves a balancing between the temperature limit of the aluminum skin and the contact stress of the tiles;while the gap spacing can be simply selected as a half of the side length of one single tile.