For the efficient vibration fault diagnosis of large gas turbine symptoms of rotor imbalance, rub, oil whirl, thermal bend, steam induced whirl, rotor misalignment are analyzed and summarized.

• 总结了燃气轮机发电机组振动故障机理、特征、影响因素和诊断方法,包括转子不平衡,动静摩擦,油膜振荡、热变形、汽流激振、转子不对中、喘振等,阐述了振动测试技术。