(1. 华中科技大学 力学系，武汉 430074；
2. 贵阳铝镁设计研究院有限公司，贵阳 550081)
摘 要: 利用ANSYS Workbench仿真平台建立铝电解槽热应力-钠膨胀耦合计算的有限元模型，提出利用非稳态质量扩散和瞬态热传导的相似性模拟钠扩散的方法，得到了钠在阴极炭块中的浓度分布。根据钠浓度的分布将钠膨胀系数转化为热膨胀系数，实现钠膨胀和热膨胀的间接耦合，模型还考虑钢的塑性变形和摩擦接触，计算结果与实际情况吻合较好。
关键字: 铝电解槽；钠扩散；热应力；钠膨胀；有限元
（1. Faculty of Mechanics, Huazhong University of Science and Technology, Wuhan 430074, China;
2. Guiyang Aluminum-Magnesium Design and Research Institute Co., Ltd., Guiyang 550081, China）
Abstract:The finite element model of the thermal stress and sodium expansion coupling in the aluminum reduction cell was established by using workbench ANSYS simulation platform. The sodium diffusion of the cathode carbon block was obtained by using the similarity between non steady state mass diffusion and the transient heat conduction. The sodium expansion coefficient was converted into the thermal expansion coefficient according to the distribution of sodium concentration, which can realize the indirect coupling between sodium expansion and thermal expansion. The plastic deformation and friction contact of steel were considered, the calculation results agree well with the actual situation.
Key words: aluminum reduction cell; sodium diffusion; thermal stress; sodium expansion; finite element method
