通过对启动过程中转子受力情况的分析，得到了控制转子破坏的主要应力；从转子表面热应力集中的方向性角度，利用Ｍｉｓｅｓ准则，建立了转子表面应力集中部位的合成应力公式，给出了计算实例。该公式和目前沿用的公式相比，理论上更为合理，在转子实际运行状态监测、检测方面更加准确。 The main stress of controlling the rotor failure is obtained through the analysis of the rotor stress during the start-up process. The synthetic stress formula of the stress concentration point on the rotor surface is established by using the Mises criterion from the direction of the thermal stress concentration on the rotor surface. The calculation example. Compared with the formulas used at present, the formula is more reasonable in theory and more accurate in the monitoring and testing of the actual running state of the rotor.