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为了揭示碳化烧蚀材料的详细热响应,运用有限元数值模拟方法建立了高温环境下碳化烧蚀材料性能分析的数值计算模型,并通过阿伦尼乌斯定律对材料的内部热解进行了分析。碳化烧蚀材料热响应计算过程中,建立了材料变物性参数计算的数学函数,并对某高硅氧酚醛复合材料的碳化烧蚀过程进行了数值模拟。结果表明:碳化烧蚀材料的热响应是多种因素综合作用的结果,随着材料内部热解,材料出现碳化层、原材料层的分层现象,材料内部发生质量损失。材料的热物理性质与碳化过程中材料温度和热解状态相关。研究方法对计算任意的碳化烧蚀具有适应性。
In order to reveal the detailed thermal response of carbonized ablation material, a numerical calculation model for the performance analysis of carbonized ablation material under high temperature was established by using the finite element numerical simulation method. The internal pyrolysis of the material was analyzed by Arrhenius law . During the calculation of the thermal response of carbonized ablative material, the mathematical function of material parameter calculation was established, and the carbonization ablation process of a high-silicon oxynitride composite was numerically simulated. The results show that the thermal response of the carbonized ablated material is the result of a combination of factors. With the internal pyrolysis of the material, the layers of the carbonized material and the raw material layer delaminate, and the mass loss occurs in the material. The thermophysical properties of the material are related to the material temperature and pyrolysis state in the carbonization process. The research methods are adaptable to calculate any carbonation ablation.