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本文在对汽轮机叶片组进行动力分析时，针对结构旋转周期性的特点，采用复约束法有效地减缩了系统自由度；在考虑离心力对旋转结构动力特性的影响时，引入了非线性的几何关系，并用有限元的方法计算了结构的动频；对于带鳍状结构的叶片，本文给出了对叶片间特殊约束的处理方法，并计算了额定转速下叶片间约束对叶片扭转角及叶片组动频的影响
In the dynamic analysis of steam turbine blade group, the complex constraint method is used to reduce the degree of freedom of the system effectively. Considering the influence of centrifugal force on the dynamic characteristics of the rotating structure, a nonlinear geometric relationship is introduced , And the dynamic frequency of the structure is calculated by the finite element method. For the blade with fin structure, this paper gives a method to deal with the special constraint between the blades and calculates the relationship between the blade twist angle and the blade group Effect of moving frequency