林旭文,高博,易法军,杨强,疏浩

• 1:哈尔滨工业大学特种环境复合材料技术国家级重点实验室

摘要(Abstract)：

烧蚀炭化材料热导率对热防护结构的温度分布、进入材料内部的净热流以及热应力分布具有重要影响，提出了一种基于动态贝叶斯网络（DBNs）的炭化材料热解过程热导率的辨识方法。在该方法中，利用全局敏感性分析方法获取各参数在整个升温过程的主要影响区间，在各区间内仅求解相应敏感参数，减少同时辨识的参数个数。将该方法用于TACOT材料热导率辨识，数值算例结果表明，稀疏化后的DBNs使最大辨识误差降低为5.68%，温度复现的均方根误差降低了45.01%，且算法具有较好的稳定性，在考虑观测温度0.8%的高斯噪声下，变异系数仅为0.16。该方法可以进一步应用于求解烧蚀炭化热防护材料的其他参数、辨识结构边界所受气动热环境。

关键词(KeyWords)： 烧蚀炭化材料;参数辨识;动态贝叶斯网络;全局敏感性分析;热导率;热解过程

Abstract:

Keywords:

基金项目(Foundation):

作者(Author): 林旭文,高博,易法军,杨强,疏浩

DOI: 10.16338/j.issn.2097-0714.20220063

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