中文摘要：

为了有效增强陶瓷管的可靠性，达到大幅度提高钠硫电池使用寿命的目的，根据有限元理论，采用ANSYS软件对钠硫电池关键部件β-A1203陶瓷管的机械强度进行了数值仿真，得出了陶瓷管最大应力随着其几何参数变化的规律。数值仿真结果表明：内外壁施压时陶瓷管最大应力随其长度与壁厚比的同比例缩小而增大，但随长度与直径比的同比例缩小而减小，而此时直径与壁厚比的同比例缩小对应力变化几乎没有影响，这为陶瓷管尺寸缩小时机械强度的优化设计提供指导。

英文摘要：

In order to improve the life of Na-S battery by enhancing the reliability of ceramic tubes, a numerical simulation on the mechanical strength ofβ-Al203 ceramics tube as the key components of Na-S battery was carried out by using a software named ANSYS based on the finite element theory. The variation of maximum stress for the ceramic tube with its size was obtained. The simulated results indicate that the maximum stress of the ceramic tube subjected to inner or outer pressure increases with decreasing the wall thickness and the length, but decreases with the reduction of the length and the diameter. The shrinking of the diameter and the wall thickness has little impact on the stress change. The simulation method provides a guideline for the optmaization design of mechanical strength when the size of ceramic tube reduces.