某变转速汽轮机叶片组的高周疲劳寿命分析

Analysis on High Cycle Fatigue Life for Turbine Blades with Variable Speed

文章对某变转速汽轮机的透平叶片组进行有限元强度分析,对叶片组的静应力水平进行评估,并对叶片组的振动特性进行分析,重点考虑变转速范围内的成组叶片B型振动对叶片的影响。还对叶片组进行高周疲劳寿命分析,重点考察叶根、叶身以及叶轮等关键部位的动应力水平,以及腐蚀特性对动应力的影响。

In this paper,the finite element strength analysis is carried out for the blade group of a variable speed turbine,and the static stress level of the blade group is evaluated;the vibration characteristics of the blade group are analyzed,and the influence of B-type vibration of the group blades in the range of variable speed on the blades is mainly considered.the high cycle fatigue life of the blade group is analyzed,focusing on the dynamic stress level of the blade root,blade body,impeller and other key parts,and the effect of corrosion characteristics on the dynamic stress is studied.