挤压油膜阻尼器失效的判据  

Bases of Judging the Failure of Squeeze Film Damper

作　　者：刘方杰[1] 

机构地区：[1]北京航空航天大学动力系

出　　处：《北京航空航天大学学报》2000年第2期167-170,共4页Journal of Beijing University of Aeronautics and Astronautics

基　　金：航空科学基金资助项目!(94B51089)

摘　　要：挤压油膜阻尼器 (简称SFD)设计不当 ,会导致功能失效 .对弹支 挤压油膜阻尼器来说 ,失效有 2种形式 :一是过不了临界 ,即转子系统的振幅随转速的上升而一直增大 ;二是出现双稳态特性 .2帧失效判据图已经作出 :一是双稳态区域图 ,只要轴承参数和质量偏心率数组不选在双稳态区域内 ,便不致产生双稳态特性 ;二是减振失效边界图 ,只要前述数据组不在失效边界的一侧 ,便不致产生过不了临界的现象 .经实验证明 ,上述结论从正反 2个方面看都是正确的 .If the design of squeeze film damper is not properly,it will be causing the failure of its functions. There are two cases of failure of the elastic support squeeze film damper:one is the bistable character being take place,the other is unable to stride over the critical state,i.e.,the amplitude of the rotor system has been increasing with the rotating speed increasing. Two diagrams of judging the failures have been established. One is the bistable region diagram. Provided the data of the bearing parameter cooperated with the unbalance ratio do not be selected in that region,the bistable character will not be arising. The other is the failure boundaries diagram of attenuating vibration. Provided the above mentioned data do not be selected at the side of failure boundaries,that will not be causing the phenomenon of unable to stride over the critical state. The result of experiment proves that the above conclusions are correct. This is observed from both positive and negative respect. By experiment, the excellent functions of attenuating vibration of squeeze film damper have also been affirmed still further.

关 键 词：失效分析 转子系统 挤压油膜阻尼器 双稳态区域 

分 类 号：V231.96[航空宇航科学与技术—航空宇航推进理论与工程]