针对机组停机后强制冷却过程中汽轮机高压转子的热应力问题进行了三维轴对称有限单元计算 ,以此为基础分析了冷却空气温度和流量等控制参数对冷却过程的影响 ,从热应力角度出发提出了最优冷却曲线。文中阐述了汽轮机转子物理模型的选择、数学建模以及计算初始条件等问题 Aiming at the finite element calculation of the thermal stress of the high-pressure steam turbine rotor during forced cooling after the unit shutdown, the influence of the control parameters such as cooling air temperature and flow rate on the cooling process is analyzed based on this. From the thermal stress point of view, The optimal cooling curve. In this paper, the selection of turbine rotor physical model, mathematical modeling and calculation of initial conditions and other issues