Power plants production’s growth capacity has led to increased concerns about efficiency and reliability of steam turbines. Its components are prone to cracking and failure caused by creep and fatigue. The present work used Ansys® and nCode GlyphWorks® package to predict tensions and deformations. The methodology used allows calculate the level of structural damage caused to each work cycle. Analysis of the application of a chemical process on the rotor to improve failure resistance influenced the component life, avoiding corrosion fatigue. To create residual stresses on the surface of material was used Shot peening process. Thermal analysis results show that the rotor supports approximately 3.18 × 10⁴ cycles, obtaining a maximum error of 12.5% compared to experimental reference. The shot peening process increased the rotor life by about 3000 h (10.5%) and changes in the heat treatment microstructure increased by 9.6% in number of cycles.

中文翻译：

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汽轮机转子的ε-N法疲劳寿命计算与提高与腐蚀疲劳

发电厂生产能力的增长导致人们对蒸汽轮机的效率和可靠性的担忧增加。其部件容易因蠕变和疲劳而开裂和失效。目前的工作使用 Ansys® 和 nCode GlyphWorks® 包来预测张力和变形。使用的方法允许计算对每个工作周期造成的结构损坏程度。分析在转子上应用化学工艺以提高抗故障能力会影响部件寿命，避免腐蚀疲劳。为了在材料表面产生残余应力，使用了喷丸强化工艺。热分析结果表明，转子支撑约 3.18 × 10 ⁴循环，与实验参考相比，最大误差为 12.5%。喷丸处理将转子寿命提高了约 3000 小时（10.5%），热处理微观结构的变化增加了 9.6% 的循环次数。