针对储能钠硫电池中核心结构部件β″－Al2 O3陶瓷管容易失效的问题，利用柱壳理论建立陶瓷管数学模型，采用ANSYS软件进行实体建模与数值模拟，并给出了陶瓷管壁厚、直径、长度与其机械强度的定量关系。结果表明：陶瓷管最大应力发生于根部，最大应力随壁厚的减小而增大，随直径的增大而增大，但与长度基本无关，陶瓷管关于壁厚和直径临界曲线基本呈线性关系，这为陶瓷管机械强度的优化设计提供量化依据。
Aiming at the problem of easy failure of theβ″-Al2 O3 ceramic tube which is the core component of energy storage sodium sulfur battery, the mathematical model of ceramic tubes was built by using cylindrical shell theory, and the solid model and the numerical simulation were carried out by using ANSYS software. The quantitative relationships among the wall thickness, the diameter, the length for the ceramic tube and its mechanical strength were given. The results indicate that the maximum stress is located at the root of ceramic tubes, and increases with the decrease of the wall thickness or the increase of the diameter, but it is almost independent of the length, and the critical curve between the wall thickness and the diameter for ceramic tubes almost presents the linear trend, which provides quantitative guidance for optimal design of mechanical strength for ceramic tubes.
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