大型汽轮发电机组轴系扭振的动频研究  

Dynamic Frequency Study of the Shafting Torsional Vibrations of a Large sized Turbogenerator

作　　者：刘峻华[1] 黄树红[1] 陆继东[1] 

机构地区：[1]华中科技大学能源与动力工程学院,湖北武汉430074

出　　处：《热能动力工程》2005年第3期234-238,共5页Journal of Engineering for Thermal Energy and Power

摘　　要：在考虑轴系动态条件的基础上,推导了动频问题的轴系扭振模型,并在有限元方法的基础上研究了轴系的几何结构和工作转速的高低等因素对轴系扭振的影响,进而给出了多盘转子扭振动频的判定准则。还对某300MW汽轮发电机组轴系扭振的动频问题进行了研究,得出了现有转速下的汽轮发电机组轴系扭振可以不考虑动频影响的结论。On the basis of taking into account the dynamic conditions of a shafting derived was a model of shafting torsional vibrations in connection with dynamic frequency problems. Based on a finite element method the authors have studied the impact of such factors as shafting geometric structure and operating speeds, etc on the shafting torsional vibrations, and thereby developed the criteria for determining the dynamic frequency of multi-disc rotor torsional vibrations. In addition, an investigation was conducted of dynamic frequency problems involved in the shafting torsional vibrations of a 300 MW turbogenerator. As a result of the investigation, it is concluded that under the condition of existing rotation speeds one can ignore the influence of dynamic frequency for the turbogenerator shafting torsional vibrations.

关 键 词：汽轮发电机组 轴系 扭转振动 动频 

分 类 号：TH113[机械工程—机械设计及理论]