Dynamics Analysis of Vibration Stability for Large Hydraulic Generator Unit

With the development of hydra electric power enterprise,the capacity,dimension and special speed of large hydraulic generator unit improve constantly,so as the strength of material,but the decline.So it's very necessary to know well the character of dynamic.The unit rotor system's wind vibration and the systematic dynamic analyzing can be described by mathematics mode.A nonlinear dynamics model of the rotor-bearing system was established.Calculating of the critical speed of the unit rotor system,by using the Riccati transfer matrix method,the author calculated and analyzed the rotor-bearing system nonlinear dynamics of the large hydraulic generating unit,and the calculating result and discussion are given,which supports the research on the characteristic analysis rotor-bearing system dynamics of large hydroelectric machines.The computer technology develop constantly,and the theory of dynamic will be perfect,the dynamic emulation of large rotor system is more and more important to the generator unit's safety work.