汽轮机末级叶片振动特性分析

末级叶片多工作在湿蒸汽区,工况十分恶劣,如果叶片在工作转速下发生共振,会产生很大的危害,甚至出现叶片断裂,导致机组故障停机等问题。因此,设计频率避开工作转速共振区域成为末级叶片开发中的重中之重。通过有限元计算叶片振动特性与试验结果之间对比,得出理论计算数据与试验结果之间的联系,进而正确指导设计,缩短末级叶片的开发周期。

The Vibration Analysis of Steam Turbine Last Stage Blade

Last stage blade is working in wet steam area,its working condition is very bad.If the blade is resonance with its working frequency,the blade will be in danger,it probably direct to blade failure,and turbine may be shut down.So in the development of last stage blade,making sure the frequency of last stage blade has no resonance with its working frequency is the most important thing.Comparing calculated data and the result from experimentation to find the relationship between them,it will make the developme...