水轮发电机组主轴弯曲振动基频研究

Study on the bend vibration base-frequency of the principal axis of hydro-generating sets

对反击式水轮发电机组主轴弯曲振动机理进行的研究,将机组的主轴径向弯曲振动分解成:①两端铰支,中部加集中转子质量;②两端铰支,中间为均匀主轴;③一端铰支,另一端加集中的转轮质量等3个系统来考虑。经过简化后,用数学方法分别推导出3个系统主轴弯曲振动方程并解出振动方程解。

This paper discusses the bend vibration of principal axis of hydrogenerating sets. In the study, it's divided into three vibration systems of two hinge system consisted by the rotator, the two hinge system consisted by axis and one hinge system consisted by the runner. The mathematical equation solutions of the bend vibration of such three systems have been separately got.