Abstract: The mechanism and characteristic of subsynchronous vibration about turbopump rotor system are explained.The reasons for inducing subsynchronous vibration,which are internal friction,dry friction,and gas dynamic excitation force between turbine blade tip and seal clearance,are discussed.The method reducing subsynchronous vibration is discussed

Key words: Turbine pump;Flexible rotor;Subsynchronous vibration +

摘要： 阐明次同步进动的发生机理和特征，讨论内阻尼（材料内阻尼、结构阻尼）、干摩擦、气弹效应、动压密封等诱发次同步进动的因素和消除次同步进动的措施。

关键词: 涡轮泵;柔性转子;次同步进动