认为突发性振动原因是运行中转子的油膜涡动和匝间短路、线圈膨胀受阻等引起的热不平衡。
It is concluded that the causes of sudden vibration are oil film whirl and thermal unbalance of generator rotor resulting from interturn short-circuit and hindered winding expansion etc.
热不平衡是汽轮发电机常见，且较难消除的振动故障之一。
Thermal unbalance is one of frequently and difficultly to treat vibration on turbogenerators.
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