汽轮发电机组轴系扭振引起的叶片响应计算

Response Calculation of Blade Subjected to Shaft Torsional Vibration in Turbine-Generator Sets

提出了汽轮发电机组轴系扭振及叶片切向振动的连续质量模型 ,在此基础上分析了叶片运动的轴系扭振的影响 ,给出了由轴系扭振引起叶片响应的计算方法 ,并对实际机组在两相短路时进行了数值计算。结果表明 :由轴系扭振引起的叶片应力对叶片的安全性分析是不可忽视的。图 3参

This paper provides continuum models for shaft torsional vibration and blade tangential vibration in turbine generator sets. The effect of blade motion on shaft torsional vibration is discussed, and the method of response calculation for blades subjected to shaft torsional vibration is given. The result of digital calculation for an actual 300MW turbine generator unit under two phase short circuit shows that the blade stress of shaft torsional vibration is an important part to the safety analysis of blade. Figs 3 and refs 4.