Multi-objective Global Optimization for Deformation Near a Hole in an Oxide Forming Alloy Foil Subjected to Thermal Cycling
Multi-objective Global Optimization for Deformation Near a Hole in an Oxide Forming Alloy Foil Subjected to Thermal Cycling
复制标题
热循环下氧化物形成合金箔孔附近变形的多目标全局优化
DOI：
10.1007/s40684-018-0027-4
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发表时间：
2018-04-01
影响因子：
4.2
通讯作者：
Li, Zhen-Zhe
中科院分区：
文献类型：
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作者：
Li, Feng-Xun;Li, Zhen-Zhe
TBC(热障涂层)系统可为燃气轮机发动机中的高温合金衬底提供高温腐蚀保护。然而，TGO(热生长氧化物)的侧向生长以及TGO和BC(粘结层)之间的热膨胀失配引起的内应力足以激活TGO的塑性变形或屈曲。本文采用解析和优化相结合的方法来提高TBC系统的耐久性。首先，应用解析法获得了TBC系统的变形结果。在接下来的步骤中，对D-最优DOE方法选择的实验点进行分析，得到分析结果。在这些分析数据的基础上，利用响应面法构造了反映TBC体系变形的拟合函数。最后，提出了一种提高TBC系统耐久性的多目标全局优化方法。所开发的解析和优化方法可广泛应用于改善燃气轮机TBC系统的性能。
The TBC (thermal barrier coating) systems provide protection against high temperature corrosion of the superalloy substrates in the gas turbine engines. However, the lateral growth of TGO (thermally-grown oxide) and the thermal expansion misfit between TGO and BC (bond coat) induce internal stress which can be sufficient to activate plastic deformation or buckling in TGO. In this paper, the analytic and optimization methods were applied for improving durability of the TBC system. First, an analytic method for obtaining the deformation results of TBC system was applied. In the following step, the analysis results were obtained for the experimental points selected by the D-optimal DOE method. Based on these analysis data, the fitting functions for showing the deformation of the TBC system were constructed using the response surface method. Finally, a multi-objective global optimization method was developed for upgrading durability of the TBC system. The developed analytic and optimization methods can be widely used to improve the performance of the TBC system for the gas turbine engines.