高超声速飞行器防热瓦结构的变厚度轻量化设计方法

针对非均匀气动加热条件下三维复杂防热瓦结构的轻量化需求，基于变厚度设计理念，发展了一种基于网格变形技术（ASD）和热固耦合分析相结合的防热瓦结构优化方法。优化结果表明，基于网格变形技术能够快速有效地解决优化过程中的网格自动更新问题，避免了网格重新划分的耗费及复杂结构网格重构的困难，并得到了光滑柔顺的厚度形状曲线；相比等厚设计，变厚度设计可以有效考虑载荷的非均匀效应，并极大地减轻结构重量；优化后可以更充分发挥防热瓦结构各层材料的承载能力。

Lightweight Design Method of Thermal Protection Tile for Hypersonic Vehicle Based on Variable Thickness

Based on the idea of variable thickness, a new method using arbitrary shape deformation (ASD) technique is proposed in this paper to minimize the weight of the thermal protection tile with non-uniform aero-thermal loads. The result shows that the presented method by the ASD technique can automatically and rapidly update the finite elements meshes without any change of the mesh topology, the optimized smooth profile of the thickness is obtained. Compared to the consistent thickness method, the effect of the non-uniform loads can be effectively considered and the lighter weight can be obtained by the variable thickness design. Moreover, the load bearing capacity of the multi-layer insulation can be used more fully after optimization.