摩擦热冲击问题的建模、仿真与振动特性分析  

MODELING SIMULATION AND VIBRATION ANALYSIS OF RUB INDUCED THERMAL IMPACT PROBLEM

作　　者：杨建刚[1] 黄葆华[1] 高伟[1] 

机构地区：[1]东南大学国家火电机组振动工程研究中心

出　　处：《中国电机工程学报》1999年第6期68-73,共6页Proceedings of the CSEE

摘　　要：摩擦是大型汽轮机发电机组常见故障。在摩擦力的作用下，摩擦面温度分布变得不均匀，转子会因此而产生热弯曲，导致异常振动。文章对该问题进行了深入研究，建立了摩擦热冲击问题的数学模型，结合实际汽轮发电机组仿真了不同情况下摩擦面温度分布和热弯曲情况，分析了摩擦热冲击作用对机组振动的影响，得出了一些有用结论。Rub is a kind of fault occurring in large turbo generator units usually.Temperature distribution around rotor's rub cross section turns to be uneven under the influence of rub force.Rotor turns to be bend in this case.It will cause large vibration.This problem is analyzed in the paper in detail.Rub induced thermal impact model is set up.Temperature distribution and thermal bend is simulated for large turbo generator unit by using this model.Influence of rub induced thermal impact on vibration is analyzed.Some useful results are obtained.

关 键 词：汽轮发电机组 摩擦热冲击 建模 仿真 振动 故障 

分 类 号：TM311.071[电气工程—电机]