挤压油膜阻尼器失效分析方法

Methods of Analysis Failure of Squeeze Film Damper

着重论述分析挤压油膜阻尼器失效的方法．首先介绍了国际上主要的航空发动机制造厂家对挤压油膜阻尼器的研究，那些厂家是ＧｅｎｅｒａｌＥｌｅｃｔｒｉｃ公司、Ｐｒａｔ＆Ｗｈｉｔｎｅｙ公司和ＲｏｌｓＲｏｙｃｅ公司．这不仅有助于我国研制挤压油膜阻尼器的工作，同时也提出一种启示，研究挤压油膜阻尼器的失效，应基于综合性参数的选配．因此，用了轴承参数Ｂ和质量偏心率Ｕ为基本参数，来说明分析失效的方法．并定义了两种失效的情况，一是转子系统过不了临界转速，二是出现双稳态特性．作出了过不了临界转速的特性图，并带有数据，还提供了３种典型的双稳态特性曲线和产生双稳态特性的数据点．

The methods of analysis failures of squeeze film damper are emphasis on expounded.First, the studies of squeeze film damper of the principal aeroengine manufacture factories in the international have been introduced. It is not only to help the envelopment of squeeze film damper for China but also it raises an inspiration that is to research the failure of squeeze film damper should be based on the collocations of synthetical parameters. Thus the bearing parameter B and unbalance eccentricity ratio U are used as the elementary parameters to detail the methods of analysis failures. There are two cases to define the failure . One is the rotor system can not to strit over the critical speed ,and the other is arising the bistable characteristic. The data and character diagram of unable to strid over critical speed ,and three typical bistable curves have been presented.