Dynamic Analysis and Experimental Study of Blades
Linked with Arch Shroud
Ni Zhenhua  Xie Zhuangning  (Shantou University)
Zhang Yingzhong (Oriental Steam Turbine Factory)

Abstract: Dynamic analysis of the blades linked with the arch shroud is carried out by the component modal synthesis, and the natural vibration of the blades shroud combination is tested using the pulse excitation and other methods. The features of the proposed analysis is that the effect of the higher truncated modes is taken into the consideration, and the arch shroud and components of blades are coupled on at the interface displacement coordinates. The work of the paper offers an effective approach to analyze vibrations of arch shroud linked long blades of steam turbines.
Keywords: blades linked with arch shrouds, component modal synthesis, dynamic characters, mode analysis.