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采用有限元法计算拱型围带的刚度并识别其与叶片连接处的边界条件，沿用叶片弯扭耦合振动和整圈连接传递矩阵理论，建立了拱型围带和拱型围带加松拉筋结构整圈连接叶片组固有频率计算模型方法。并比较了实物动、静频的计算和实测结果，表明二者吻合较好。对此类结构叶片的调频作了深入的研究，提出了调频方法
The stiffness of arcuate shrouds was calculated by finite element method and the boundary conditions of the arcuate shrouds were identified. The bending and torsional coupled vibration of the blades and the whole circle connection transfer matrix theory were used to establish the arcuate shrouds and arcuate shrouds of Casson The Method of Calculating the Natural Frequencies of the Whole Circle Connection Vane Group with Rib Structure. Comparing the calculation of real moving and static frequency and the measured results show that the two agree well. In this paper, the structure of the blade frequency modulation made in-depth study, proposed FM method