摘要
讨论了大型水轮发电机组主轴系统的建模问题，建立了一个具有局部非线性的多自由度轴系模型。各个导轴承的油膜作为非线性元件，并考虑回转效应、摆动惯性、剪切效应、发电机的电磁拉力、水的附加惯性等因素以及作用在轴上任意形式的机械、电磁和水动的激励力。瞬态响应的计算综合采用了Ｒｉｃｃａｔｉ传递矩阵法和Ｎｅｗｍａｒｋ－β数值积分法。推导了求解瞬态响应的公式，编制了通用的计算软件。以湖南凌源五强溪电厂的２４０ＭＷ大型水轮发电机组轴系为实例，给出了计算结果和讨论，为大型水轮发电机组的稳定性研究提供参考和技术支持。
The modeling strategy of the rotorbearing system of large hydroelectric machines is discussed and a multidegrees of freedom system with local nonlinearity is developed. The oilfilms of the guide bearings are treated as nonlinear elements. Taking into account the gyroscopic effect, angular inertia, shear deformation and inertia of the water in the runner etc., the various mechanical, electrical and hydraulic forces acting on rotor externally can be considered in the calculating model. The transient responses of the system are calculated by combined using the Riccati transfer matrix method and the Newmarkβ method, and a general software is compiled. The rotorbearing system of a 240MW Francis hydraulic generator set is used as an example, and the calculating result and discussion are given, which supports the research on the stability of large hydroelectric machines.
出处
《清华大学学报（自然科学版）》
EI
CAS
CSCD
北大核心
1998年第6期123-128,共6页
Journal of Tsinghua University(Science and Technology)
基金
国家自然科学基金
机械部技术发展基金
关键词
水轮发电机组
转子轴承系统
非线性瞬态响应
hydroelectric machines
rotorbearing system
modeling
nonlinear transient response
transfer matrix method
