中国电机工程学报2011，Vol.31Issue(2)：62-66,5.
加载速率对汽轮机转子钢低周疲劳损伤的影响
Effect of Loading Rate on Low-cycle Fatigue Damage of Turbine Rotor Steel
摘要
Abstract
Loading rate is associated with high thermo-mechanical loads change rate of the turbine rotors during start-up and shut-down procedures. Low-cycle fatigue damage of power plant turbine rotor 30CrlMolV steel was studied at 538 ℃, and the effect on the actual low-cycle fatigue damage and the predicted low-cycle fatigue damage of the loading rate were also studied. The results show that higher strain loading rate leads to the smaller low-cycle fatigue damage in the same cycle life fraction. The greater total strain amplitude brings the greater low-cycle fatigue damage in the same loading rate. While in the same strain amplitude condition,the predicted low-cycle fatigue damage of the rotor steel is larger than the actual one, the low-cycle fatigue predicted damage is greater in the lower loading rate test process. The loading rate range which has significant effect to the material damage is 0.1％·s-1 ≤ ε≤ 0.2％·s-1.关键词
低周疲劳损伤/寿命/汽轮机转子/加载速率/30Cr1Mo1V钢分类
机械制造引用本文复制引用
何建军,陈荐,孙清民,邱玮,周鹏展..加载速率对汽轮机转子钢低周疲劳损伤的影响[J].中国电机工程学报,2011,31(2):62-66,5.基金项目
国家自然科学基金项目(50775015) （50775015）
湖南省教育厅重点科研项目(06A002) （06A002）
湖南省重点学科青年创新基金项目(d10903). （d10903）
