ABSTRACT The principal objective of work was to develop fast and accurate method for online creep life monitoring of steam turbine rotors. For this purpose, a characteristic strain model of creep was investigated and validated using test data of 2%CrMoV rotor steel. The model was then used to determine creep damage functions which are introduced to compute creep damage at a constant temperature based on the Robinson time fraction rule. Finite element (FE) creep calculations of a turbine rotor were performed using the same creep model to obtain reference damage results for validating the proposed method. Comparisons of the results obtained using both methods showed a very good accuracy of the online creep damage predictions.

中文翻译：

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汽轮机转子在线监测蠕变寿命评估方法

摘要 工作的主要目标是开发快速、准确的汽轮机转子蠕变寿命在线监测方法。为此，使用 2%CrMoV 转子钢的测试数据研究并验证了蠕变的特征应变模型。然后使用该模型确定蠕变损伤函数，该函数被引入以根据罗宾逊时间分数规则计算恒定温度下的蠕变损伤。使用相同的蠕变模型对涡轮转子进行有限元 (FE) 蠕变计算，以获得用于验证所提出方法的参考损坏结果。使用两种方法获得的结果的比较表明，在线蠕变损伤预测具有非常好的准确性。