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数学分析的方法难于求解复杂几何形状和多样化的边界条件的热应力问题。特别是在非定常的情况下,温度变化范围比较大,物性系数随温度的变化是显著的。如果考虑这种情况,则问题更难以解决。该文用有限元法来求解非定常热传导和热应力的轴对称问题,求解过程中考虑了物性系数随温度的变化,并将问题作为拟静态来处理,边界条件下受限制。
The mathematical analysis method is difficult to solve the thermal stress problem of complex geometry and diverse boundary conditions. Especially in the case of unsteady conditions, the temperature range is relatively large, and the change of the physical property coefficient with temperature is significant. If you consider this situation, the problem is more difficult to solve. In this paper, the finite element method is used to solve the axisymmetric problem of unsteady heat conduction and thermal stress. During the solving process, the change of physical property coefficient with temperature is considered. The problem is treated as quasi-static and the boundary conditions are limited.