Damping Vibration Characteristics of Frictional Damping Structure in Steam Turbine Integrally Shrouded Blades
The principium of damping vibration and the effects of damping vibration in damping structure of steam turbine integrally shrouded blades are investigated in this paper. Firstly, according to the characteristics of dry friction damping structure local-connection being nonlinear element and damping shroud contact interface being unparallel to the direction of blade vibration. The physical and kinetic models of the damping structure of integrally shrouded blades were established. Then, qualitative and quantitative analysis of the characteristics of damping vibration is explored by means of equivalent linearization and harmonic balance method. The research findings show that the contact tangential rigidity and normal force influence the vibration characteristics of blade, but the angle of shroud interface and direction of blade vibration and friction coefficient have no impacts on the vibratory characteristics of blade, only affect the optimal normal force and its distribution interval, the amplitude and frequency of external excitation force impact complexly on the vibratory characteristics of the damping structure. The results of this paper might provide theoretical guidance and suggestions for reasonable design in the damping structure of steam turbine integrally shrouded blades.
Steam turbine Integrally shrouded blades Damping structure Dry friction Characteristics of damping vibration
Xuxiang LU Wenjun HUANG Luping LI Shuhong HUANG
School of Energy and Power Engineering , Huazhong University of Science and Technology, Wuhan, 43007 School of Energy and Power Engineering , Changsha University of Science and Technology, Changsha, 41 School of Energy and Power Engineering , Huazhong University of Science and Technology, Wuhan, 43007
国际会议
2007杭州国际动力工程会议(The International Conference on Power Engineering 2007)
杭州
英文
2007-10-23（万方平台首次上网日期，不代表论文的发表时间）